Distribution Agreement, dated December 14, 2022, among Alliant Energy Corporation, Barclays Capital Inc., Mizuho Securities USA LLC and Wells Fargo Securities, LLC

Exhibit 1.1

DISTRIBUTION AGREEMENT

December 14, 2022

Barclays Capital Inc.

745 7th Avenue

New York, NY 10019

Mizuho Securities USA LLC

1271 Avenue of the Americas, 3rd Floor

New York, NY 10020

Wells Fargo Securities, LLC

30 Hudson Yards, 14th Floor

New York, NY 10001

Ladies and Gentlemen:

Alliant Energy Corporation, a Wisconsin corporation (the “Company”), confirms its agreement with Barclays Capital Inc., Mizuho Securities USA LLC and Wells Fargo Securities, LLC (as agents and/or principals under any Terms Agreement (as defined in Section 1(a) below), each, an “Agent” and together, the “Agents”), with respect to the issuance and sale from time to time by the Company, in the manner and subject to the terms and conditions described below in this Distribution Agreement (this “Agreement”), of Common Stock, $0.01 par value per share (the “Common Stock”), of the Company having an aggregate Gross Sales Price (as defined in Section 2(b) below) of up to $225,000,000 (the “Maximum Amount”) on the terms set forth in Section 1 of this Agreement. Such shares are hereinafter collectively referred to as the “Shares” and are described in the Prospectus referred to below.

The Company has filed with the Securities and Exchange Commission (the “Commission”) a registration statement on Form S-3 (No. 333-251353) (the “registration statement”) for the registration of the Shares and other securities of the Company under the Securities Act of 1933, as amended, and the rules and regulations of the Commission thereunder (collectively, the “Act”); and such registration statement sets forth the terms of the offering, sale and plan of distribution of the Shares and contains additional information concerning the Company and its business. Except where the context otherwise requires, “Registration Statement,” as used herein, means the registration statement, as amended at the time of such registration statement’s effectiveness for purposes of Section 11 of the Act, as such section applies to the Agents, including (1) all documents filed as a part thereof or incorporated or deemed to be incorporated by reference therein and (2) any information contained or incorporated by reference in a prospectus filed with the Commission pursuant to Rule 424(b) under the Act, to the extent such information is deemed, pursuant to Rule 430B or Rule 430C under the Act, to be part of the registration statement at the effective time. “Basic Prospectus” means the prospectus dated December 15, 2020 filed as part of the Registration Statement, including the documents incorporated by reference therein as of the date of such prospectus;

“Prospectus Supplement” means the most recent prospectus supplement relating to the Shares, to be filed by the Company with the Commission pursuant to Rule 424(b) under the Act on or before the second business day after the date of its first use in connection with a public offering or sale of Shares pursuant hereto (or such earlier time as may be required under the Act), in the form furnished by the Company to the Agents in connection with the offering of the Shares; “Prospectus” means the Prospectus Supplement (and any additional prospectus supplement prepared in accordance with the provision of Section 4(h) of this Agreement and filed in accordance with the provisions of Rule 424(b)) together with the Basic Prospectus attached to or used with the Prospectus Supplement; and “Permitted Free Writing Prospectus” has the meaning set forth in Section 3(c). Any reference herein to the Registration Statement, the Basic Prospectus, the Prospectus Supplement, the Prospectus or any Permitted Free Writing Prospectus shall, unless otherwise stated, be deemed to refer to and include the documents, if any, incorporated by reference, or deemed to be incorporated by reference, therein (the “Incorporated Documents”), including, unless the context otherwise requires, the documents, if any, filed as exhibits to such Incorporated Documents. Any reference herein to the terms “amend,” “amendment” or “supplement” with respect to the Registration Statement, the Basic Prospectus, the Prospectus Supplement, the Prospectus or any Permitted Free Writing Prospectus shall, unless stated otherwise, be deemed to refer to and include the filing of any document under the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (collectively, the “Exchange Act”) on or after the initial effective date of the Registration Statement, or the date of the Basic Prospectus, the Prospectus Supplement, the Prospectus or such Permitted Free Writing Prospectus, as the case may be, and deemed to be incorporated therein by reference. References in this Agreement to financial statements or other information that is “contained,” “included,” “described,” “set forth” or “provided” in the Registration Statement, the Basic Prospectus, the Prospectus Supplement, the Prospectus or any Permitted Free Writing Prospectus and any similar references shall, unless stated otherwise, include any information incorporated or deemed to be incorporated by reference therein.

The Company and the Agents agree as follows:

1. Issuance and Sale.

(a) Upon the basis of the representations, warranties and agreements and subject to the terms and conditions set forth herein and provided the Company provides the Agents with any due diligence materials and information reasonably requested by the Agents necessary for the Agents to satisfy their due diligence obligations, on any Exchange Business Day (as defined below) selected by the Company, the Company and any one Agent shall enter into an agreement in accordance with Section 2 hereof regarding the number of Shares to be placed by such Agent, as an agent, and the manner in which and other terms upon which such placement is to occur (each such transaction being referred to as an “Agency Transaction”). For the avoidance of doubt, any Agency Transaction must be between the Company and a single Agent, and the Company may be party to only one Agency Transaction at any given time during the term of the Distribution Agreement. The Company may also offer to sell the Shares directly to any Agent, as principal, in which event such parties shall enter into a separate agreement (each, a “Terms Agreement”) in substantially the form of Exhibit A hereto (with such changes thereto as may be agreed upon by the Company and such Agent to accommodate a transaction involving additional underwriters), relating to such sale in accordance with Section 2(g) of this Agreement (each such

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transaction being referred to as a “Principal Transaction”). As used herein, (i) the “Term” shall be the period commencing on the date hereof and ending on the earlier of (x) the date on which the aggregate Gross Sales Price of Shares issued and sold pursuant to this Agreement and any Terms Agreements equals the Maximum Amount and (y) any termination of this Agreement pursuant to Section 8; (ii) an “Exchange Business Day” means any day during the Term that is a trading day for the Exchange other than a day on which trading on the Exchange is scheduled to close prior to its regular weekday closing time; and (iii) “Exchange” means the Nasdaq Global Select Market.

(b) Subject to the terms and conditions set forth below, the Company appoints the Agents, as agents, in connection with the offer and sale of Shares in any Agency Transactions entered into hereunder. The Agents will use commercially reasonable efforts, consistent with their normal trading and sales practices, to sell such Shares in accordance with the terms and subject to the conditions hereof and of the applicable Transaction Acceptance (as defined below). Neither the Company nor the Agents shall have any obligation to enter into an Agency Transaction. The Company shall be obligated to issue and sell through any Agent, and such Agent shall be obligated to use commercially reasonable efforts, consistent with its normal trading and sales practices and as provided herein and in the applicable Transaction Acceptance, to place Shares only if and when the Company makes a Transaction Proposal to such Agent related to such an Agency Transaction and a Transaction Acceptance related to such Agency Transaction has been delivered to the Company by such Agent as provided in Section 2 below.

(c) Each Agent, as agent in any Agency Transaction, hereby covenants and agrees not to make any sales of the Shares on behalf of the Company pursuant to this Agreement other than (A) by means of ordinary brokers’ transactions that qualify for delivery of a Prospectus in accordance with Rule 153 under the Act and meet the definition of an “at the market offering” under Rule 415(a)(4) under the Act (such transactions are hereinafter referred to as “At the Market Offerings”), which may include transactions directly on or through the Exchange or any other national securities exchange or facility thereof, a trading facility of a national securities association or an alternative trading system, and (B) such other sales of the Shares on behalf of the Company in its capacity as agent of the Company as shall be agreed by the Company and such Agent in writing.

(d) If Shares are to be sold in an Agency Transaction in an At the Market Offering, the respective Agent will confirm in writing to the Company the number of Shares sold on any Exchange Business Day and the related Gross Sales Price and Net Sales Price (as each of such terms is defined in Section 2(b) below) no later than the opening of trading on the immediately following Exchange Business Day.

(e) If the Company shall default on its obligation to deliver Shares to any Agent pursuant to the terms of any Agency Transaction or Terms Agreement, the Company shall (i) indemnify and hold harmless such Agent and its successors and assigns from and against any and all losses, claims, damages, liabilities and expenses arising from or as a result of such default by the Company and (ii) notwithstanding any such default, pay to such Agent the commission to which it would otherwise be entitled in connection with such sale in accordance with Section 2(b) below.

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(f) The Company acknowledges and agrees that (i) there can be no assurance that any Agent will be successful in selling the Shares; (ii) no Agent shall incur any liability or obligation to the Company or any other person or entity if it does not sell Shares for any reason other than a failure by such Agent to use its commercially reasonable efforts consistent with its normal trading and sales practices and applicable law and regulations to sell such Shares in accordance with the terms of this Agreement; and (iii) no Agent shall be under any obligation to purchase Shares on a principal basis pursuant to this Agreement, except as may otherwise be specifically agreed by such Agent and the Company in a Terms Agreement.

2. Transaction Acceptances and Terms Agreements.

(a) The Company may, from time to time during the Term, propose to any Agent that they enter into an Agency Transaction to be executed on a specified Exchange Business Day or over a specified period of Exchange Business Days, which proposal shall be made to such Agent by telephone or by email from any of the individuals listed as an authorized representative of the Company on Schedule A hereto (which may be updated from time to time by certificate of the Company) and shall set forth the information specified below (each, a “Transaction Proposal”). If such Agent agrees to the terms of such proposed Agency Transaction or if the Company and such Agent mutually agree to modified terms for such proposed Agency Transaction, then such Agent shall promptly deliver to the Company by email a notice (each, a “Transaction Acceptance”) confirming the terms of such proposed Agency Transaction as set forth in such Transaction Proposal or setting forth the modified terms for such proposed Agency Transaction as agreed by the Company and such Agent, as the case may be, whereupon such Agency Transaction shall become a binding agreement between the Company and such Agent. Each Transaction Proposal shall specify:

A Transaction Proposal shall not set forth a Specified Number of Shares that, when added to the aggregate number or aggregate Gross Sales Price of Shares previously purchased and to be purchased pursuant to pending Transaction Acceptances (if any) hereunder and any Terms Agreements, results or could result in a total aggregate Gross Sales Price that exceeds the

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Maximum Amount nor shall it set forth a Floor Price which is lower than the minimum price authorized from time to time by the Company’s board of directors or, if permitted by applicable law and the Company’s charter and bylaws, a duly authorized committee thereof. The Company shall have responsibility for maintaining records with respect to the aggregate number and aggregate Gross Sales Price of Shares sold and for otherwise monitoring the availability of Shares for sale under the Registration Statement and for insuring that the aggregate number and aggregate Gross Sales Price of Shares offered and sold does not exceed, and the price at which any Shares are offered or sold is not lower than, the aggregate number and aggregate Gross Sales Price of Shares and the minimum price authorized from time to time by the Company’s board of directors or, if permitted by applicable law and the Company’s charter and bylaws, a duly authorized committee thereof. In the event that more than one Transaction Acceptance with respect to any Purchase Date(s) is delivered by such Agent to the Company, the latest Transaction Acceptance shall govern any sales of Shares for the relevant Purchase Date(s), except to the extent of any action occurring pursuant to a prior Transaction Acceptance and prior to the delivery to the Company of the latest Transaction Acceptance. The Company or an Agent may, upon notice to the other parties by telephone (confirmed promptly by e-mail), suspend or terminate the offering of the Shares pursuant to Agency Transactions for any reason; provided, however, that such suspension or termination shall not affect or impair the parties’ respective obligations with respect to the Shares sold hereunder prior to the giving of such notice or their respective obligations under any Terms Agreement. Notwithstanding the foregoing, if the terms of any Agency Transaction contemplate that Shares shall be sold on more than one Purchase Date, then the Company and such Agent shall mutually agree to such additional terms and conditions as they deem reasonably necessary in respect of such multiple Purchase Dates, and such additional terms and conditions shall be set forth in or confirmed by, as the case may be, the relevant Transaction Acceptance and be binding to the same extent as any other terms contained therein. During any term of suspension, the Company shall not be obligated to deliver (or cause to be delivered) any of the documents referred to in Section 6(b) through (d), be deemed to affirm any of the representations and warranties contained in this Agreement pursuant to Section 3 or 6(a) hereof, or be obligated to conduct any due diligence session referred to in Section 6(f), until the termination of the suspension and the recommencement of the offering of the Shares pursuant to this Agreement (which recommencement shall constitute a Bring Down Delivery Date, as defined in Section 6(b) below).

(b) The Purchase Date(s) in respect of the Shares deliverable pursuant to any Transaction Acceptance shall be set forth in or confirmed by, as the case may be, the applicable Transaction Acceptance. Except as otherwise agreed between the Company and any Agent, such Agent’s commission for any Shares sold through such Agent pursuant to this Agreement shall be a percentage equal to 1.00%, of the actual sales price of such Shares (the “Gross Sales Price”), which commission shall be as set forth in or confirmed by, as the case may be, the applicable Transaction Acceptance; provided, however, that such commission shall not apply when such Agent acts as principal, in which case such commission or a discount shall be set forth in the applicable Terms Agreement. Notwithstanding the foregoing, in the event the Company engages any Agent for a sale of Shares in an Agency Transaction that would constitute a “distribution,” within the meaning of Rule 100 of Regulation M under the Exchange Act, the Company will provide such Agent, at such Agent’s request and upon reasonable advance notice to the Company, on or prior to the Settlement Date, the opinions of counsel, accountants’ letters and officers’ certificates pursuant to Section 5 hereof, each dated the Settlement Date, and such other

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documents and information as such Agent shall reasonably request, and the Company and such Agent will agree to compensation that is customary for the Agent with respect to such transaction. The Gross Sales Price less the applicable Agent’s commission and after deduction for any transaction fees, transfer taxes or similar taxes or fees imposed by any governmental, regulatory or self-regulatory organization in respect of the sale of the applicable Shares is referred to herein as the “Net Sales Price.”

(c) Payment of the Net Sales Price for Shares sold by the Company on any Purchase Date pursuant to a Transaction Acceptance shall be made to the Company by wire transfer of immediately available funds to the account of the Company (which the Company shall provide to the applicable Agent at least one Exchange Business Day prior to the applicable Agency Settlement Date (as defined below)) against delivery of such Shares to such Agent’s account, or an account of such Agent’s designee, at The Depository Trust Company through its Deposit and Withdrawal at Custodian System (“DWAC”) or by such other means of delivery as may be agreed to by the Company and such Agent. Such payment and delivery shall be made at or about 10:00 a.m. (New York City time) on the second Exchange Business Day (or such other day as may, from time to time, become standard industry practice for settlement of such a securities issuance or as agreed to by the Company and the applicable Agent) following each Purchase Date (each, an “Agency Settlement Date”).

(d) If, as set forth in or confirmed by, as the case may be, the related Transaction Acceptance, a Floor Price has been agreed to by the parties with respect to a Purchase Date, and the applicable Agent thereafter determines and notifies the Company that the Gross Sales Price for such Agency Transaction would not be at least equal to such Floor Price, then the Company shall not be obligated to issue and sell through such Agent, and such Agent shall not be obligated to place, the Shares proposed to be sold pursuant to such Agency Transaction on such Purchase Date, unless the Company and such Agent otherwise agree in writing.

(e) If either party has reason to believe that the exemptive provisions set forth in Rule 101(c)(1) of Regulation M under the Exchange Act are not satisfied with respect to the Shares, it shall promptly notify the other party and sales of the Shares under this Agreement, any Transaction Acceptance or any Terms Agreement shall be suspended until that or other exemptive provisions have been satisfied in the judgment of each party. On or prior to the delivery of a prospectus that is required (whether physically or through compliance with Rule 172 under the Act or any similar rule) in connection with the offering or sale of the Shares, the Company shall calculate the average daily trading volume (as defined under “ADTV” by Rule 100 of Regulation M under the Exchange Act) of the Common Stock based on market data provided by Bloomberg L.P. or such other sources as agreed upon by the Company and the applicable Agent.

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(ii) The terms set forth in a Terms Agreement shall not be binding on the Company or the applicable Agent unless and until the Company and such Agent have each executed and delivered such Terms Agreement accepting all of the terms of such Terms Agreement. In the event of a conflict between the terms of this Agreement and the terms of a Terms Agreement, the terms of such Terms Agreement shall control.

(g) Each sale of the Shares to any Agent in a Principal Transaction shall be made in accordance with the terms of this Agreement and a Terms Agreement, which shall provide for the sale of such Shares to, and the purchase thereof by, such Agent. A Terms Agreement may also specify certain provisions relating to the reoffering of such Shares by such Agent. The commitment of any Agent to purchase the Shares pursuant to any Terms Agreement shall be deemed to have been made on the basis of the representations, warranties and agreements of the Company contained, and shall be subject to the terms and conditions set forth, in this Agreement and such Terms Agreement. Any such Terms Agreement shall specify the number of the Shares to be purchased by the applicable Agent pursuant thereto, the price to be paid to the Company for such Shares, any provisions relating to rights of, and default by, underwriters, if any, acting together with such Agent in the reoffering of the Shares, and the time and date (each such time and date being referred to herein as a “Principal Settlement Date”; and, together with any Agency Settlement Date, a “Settlement Date”) and place of delivery of and payment for such Shares.

(ii) Notwithstanding clause (i) of Section 2(h) hereof, if the Company wishes to offer or sell Shares to an Agent as sales agent at any time during the period from and including an Earnings Announcement through and including the corresponding Filing Time, the Company shall first (A) prepare and deliver to such Agent (with a copy to counsel for the Agents) a Current Report on Form 8-K that includes substantially the same financial and related information (together

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with management’s discussion and analysis thereof) that was included in such Earnings Announcement (other than any earnings projections and similar forward-looking data and officers’ quotations) (each, an “Earnings 8-K”), in form and substance reasonably satisfactory to such Agent, and, prior to its filing, obtain the written consent of such Agent to such filing (which consent shall not be unreasonably withheld), (B) provide such Agent with the officers’ certificate, accountants’ letter and opinion and letter of counsel called for by Section 6(b), 6(c) and 6(d) hereof, (C) afford such Agent the opportunity to conduct a due diligence review in accordance with Section 6(f) hereof prior to filing such Earnings 8-K, and (D) file such Earnings 8-K with the Commission. For purposes of clarity, the parties hereto agree that (x) the delivery of any officers’ certificate, accountants’ letter or opinion and letter of counsel pursuant to this Section 2(h)(ii) shall not relieve the Company from any of its obligations under this Agreement with respect to any Quarterly Report on Form 10-Q or Annual Report on Form 10-K, as the case may be, including, without limitation, the obligation to deliver officers’ certificates, accountants’ letters and opinions and letters of counsel as provided in Sections 6(b), 6(c) and 6(d) hereof, and (y) this Section 2(h)(ii) shall in no way affect or limit the operation of clause (i) of Section 2(h)(i) hereof, which shall have independent application.

(i) The Company agrees that any offer to sell, any solicitation of an offer to buy, or any sales of Shares by the Company shall be effected only by or through the Agents.

(j) Anything in this Agreement to the contrary notwithstanding, the Company shall not authorize the issuance and sale of, and the Agents, as sales agents, shall not be obligated to use their commercially reasonable efforts, consistent with their normal trading and sales practices, to sell, any Shares at a price lower than the minimum price, or in a number or with an aggregate gross or net sales price in excess of the number or aggregate gross or net sales price, as the case may be, authorized from time to time to be issued and sold under this Agreement and any Terms Agreement, in each case by the Company’s board of directors or, if permitted by applicable law and the Company’s charter and by-laws, a duly authorized committee thereof, or in a number in excess of the number of Shares approved for listing on the Exchange, or in excess of the number or amount of Shares available for issuance on the Registration Statement or as to which the Company has paid the applicable registration fee, it being understood and agreed by the parties hereto that compliance with any such limitations shall be the sole responsibility of the Company.

3. Representations, Warranties and Agreements of the Company. The Company represents and warrants to, and agrees with, the Agents, on and as of (i) the date hereof; (ii) each date on which the Company receives a Transaction Acceptance (the “Time of Acceptance”); (iii) each date on which the Company executes and delivers a Terms Agreement; (iv) each Time of Sale (as defined in Section 3(a)); (v) each Settlement Date; and (vi) each Bring-Down Delivery Date (as defined in Section 6(b)) (each such date listed in (i) through (vi), a “Representation Date”), as follows:

(a) The Company meets the requirements for use of Form S-3 under the Act. The Registration Statement is an “automatic shelf registration statement” as defined under Rule 405 of the Act that automatically became effective not more than three years prior to the date hereof. No stop order suspending the use of the Registration Statement, the Prospectus or any Permitted Free Writing

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Prospectus has been issued under the Act and no proceedings for that purpose have been instituted or are pending or, to the knowledge of the Company, are contemplated by the Commission, and any request on the part of the Commission for additional information has been complied with. The Company has not received from the Commission any notice pursuant to Rule 401(g)(2) under the Act objecting to the use of the automatic shelf registration statement form and the Company has not otherwise ceased to be eligible to use the automatic shelf registration form.

At the respective times the Registration Statement became effective (including without limitation any effective dates of any amendments thereto and each deemed effective date with respect to the Agents pursuant to Rule 430B(f)(2) of the Act) and at each Representation Date, the Registration Statement and any amendments and supplements thereto complied or will comply, as the case may be, in all material respects with the requirements of the Act, and did not or will not, as the case may be, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading. Neither the Prospectus nor any amendments or supplements thereto, at the time the Prospectus or any such amendment or supplement was issued and at any Representation Date, included or will include an untrue statement of a material fact or omitted or will omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. The representations and warranties in this subsection shall not apply to statements in or omissions from the Registration Statement or Prospectus made in reliance upon and in conformity with information furnished to the Company in writing by the Agents expressly for use in the Registration Statement (or any amendment thereto) or Prospectus (or any amendment thereto), it being understood and agreed that the only such information consists of the information appearing in the fifth paragraph under the caption “Plan of Distribution” in the Prospectus Supplement.

Each of the Basic Prospectus and the Prospectus Supplement filed as part of the Registration Statement as originally filed or as part of any amendment thereto, or filed pursuant to Rule 424 under the Act, complied when so filed in all material respects with the Act and each preliminary prospectus and the Prospectus delivered to the Agents for use in connection with this offering was identical to the electronically transmitted copies thereof filed on the Commission’s Electronic Data Gathering, Analysis and Retrieval system or any successor system thereto (collectively, “EDGAR”), except to the extent permitted by Regulation S-T.

Each Permitted Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Shares or until any earlier date that the Company notified or notifies the Agents as described in the next sentence, did not, does not and will not include any information that conflicted, conflicts or will conflict with the information contained in the Registration Statement or the Prospectus, including any document incorporated by reference therein and any preliminary or other prospectus deemed to be a part thereof that has not been superseded or modified. If at any time following issuance of a Permitted Free Writing Prospectus there occurred or occurs an event or development as a result of which such Permitted Free Writing Prospectus included or would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein,

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in the light of the circumstances, not misleading, the Company has notified or will notify promptly the Agents so that any use of such Permitted Free Writing Prospectus may cease until it is amended or supplemented. The foregoing two sentences do not apply to statements in or omissions from any Permitted Free Writing Prospectus based upon and in conformity with written information furnished to the Company by the Agents expressly for use therein.

As used herein, “Time of Sale” means (i) with respect to each offering of Shares pursuant to this Agreement, the time of any Agent’s initial entry into contracts with investors for the sale of such Shares and (ii) with respect to each offering of Shares pursuant to any relevant Terms Agreement, the time of sale of such Shares.

(b) At the time of filing the Registration Statement, at the time of the most recent amendment thereto for purposes of complying with Section 10(a)(3) of the Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the Exchange Act, or form of prospectus) and as of the date hereof, the Company was and is a “well known seasoned issuer” as defined in Rule 405 of the Act.

(c) Prior to the execution of this Agreement, the Company has not, directly or indirectly, offered or sold any of the Shares by means of any “prospectus” (within the meaning of the Act) or used any “prospectus” (within the meaning of the Act) in connection with the offer or sale of the Shares, in each case other than the Basic Prospectus. The Company represents and agrees that, unless it obtains the prior consent of the Agents, until the termination of this Agreement, it has not made and will not make any offer relating to the Shares that would constitute an “issuer free writing prospectus” (as defined in Rule 433 under the Act) or that would otherwise constitute a “free writing prospectus” (as defined in Rule 405 under the Act) other than any Permitted Free Writing Prospectus. Any such free writing prospectus relating to the Shares consented to by the Agents (including any Free Writing Prospectus prepared by the Company solely for use in connection with the offering contemplated by a particular Terms Agreement) is herein referred to as a “Permitted Free Writing Prospectus”. The Company has complied and will comply in all material respects with the requirements of Rule 433 under the Act applicable to any Permitted Free Writing Prospectus, including timely filing with the Commission where required, legending and record keeping. The conditions set forth in one or more of subclauses (i) through (iv), inclusive, of Rule 433(b)(1) under the Act are satisfied, and the registration statement relating to the offering of the Shares contemplated hereby, as initially filed with the Commission, includes a prospectus that, other than by reason of Rule 433 under the Act, satisfies the requirements of Section 10 of the Act; the Company is not disqualified, by reason of Rule 164(f) or (g) under the Act, from using, in connection with the offer and sale of the Shares, “free writing prospectuses” (as defined in Rule 405 under the Act) pursuant to Rules 164 and 433 under the Act; the Company was not as of each eligibility determination date for purposes of Rules 164 and 433 under the Act with respect to the offering of the Shares contemplated by the Registration Statement and this Agreement and is not an “ineligible issuer”. The Company has paid or, no later than the business day after the date of this Agreement, will pay the registration fee for the offering of the Maximum Amount of Shares pursuant to Rule 457 under the Act.

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(d) The Incorporated Documents, at the time they were or hereafter are filed with the Commission, complied or will comply, as the case may be, in all material respects with the requirements of the Exchange Act, and, when read together with the other information in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, did not or will not, as the case may be, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading. The description of regulatory matters to which the Company is subject, as disclosed in the Company’s filings with the Commission under the Exchange Act and as incorporated by reference into the Registration Statement, is true and correct in all material respects, except to the extent such description in any specific filing has been superseded, updated or supplemented by such description in a subsequent filing under the Exchange Act made prior to the date hereof and incorporated by reference into the Registration Statement or by such description in the Prospectus or any Permitted Free Writing Prospectus.

(e) The historical consolidated financial statements of the Company and its consolidated subsidiaries and the related notes thereto included or incorporated by reference in the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus present fairly in all material respects the consolidated financial position of the Company and its consolidated subsidiaries at the dates indicated and the consolidated statements of income, changes in common equity and cash flows of the Company and its consolidated subsidiaries for the periods specified. Said financial statements have been prepared in conformity with generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods presented. The supporting schedules included in the Registration Statement, if any, present fairly in all material respects in accordance with GAAP the information required to be stated therein. The selected consolidated financial data and the summary consolidated financial information included in the Prospectus and any Permitted Free Writing Prospectus present fairly in all material respects the information shown therein and have been compiled on a basis consistent with that of the audited financial statements incorporated by reference in the Registration Statement. The other financial and statistical information and data included or incorporated by reference in the Registration Statement and the Prospectus are accurate and fairly presented in all material respects, and prepared on a basis consistent with such financial statements and the books and records of the Company and its consolidated subsidiaries. No other financial statements are required by the Act or the Exchange Act to be included or incorporated by reference in the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus.

(f) Since the respective dates as of which information is given in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, except as otherwise stated therein, (i) there has not been any change in the capital stock (other than shares of Common Stock issued or delivered pursuant to equity incentive, compensation and/or employee benefit plans of the Company and its consolidated subsidiaries (the “Company Stock Plans”) referred to in the Registration Statement and the Prospectus or upon the conversion, vesting or exercise of options, rights and other securities granted thereunder, the issuance of Shares pursuant to this Agreement or any Terms Agreement, and the issuance of shares of Common Stock pursuant to the Company’s Shareowner Direct Plan or other dividend reinvestment plan referred to in the Registration Statement and the Prospectus) or short-term or long-term debt (except for borrowings and the repayment of borrowings in the ordinary course of business); (ii) there has been no material adverse change in the condition, financial or otherwise, earnings or business affairs of the Company and its consolidated subsidiaries considered as one enterprise or on the

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performance by the Company of its obligations under this Agreement or any Terms Agreement, whether or not arising in the ordinary course of business, nor have there been any developments involving a prospective material adverse change of the Company and its consolidated subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business (a “Material Adverse Effect”); (iii) there have been no transactions entered into by the Company or any of its consolidated subsidiaries, other than those in the ordinary course of business, which are material with respect to the Company and its consolidated subsidiaries considered as one enterprise, and (iv) except for regular dividends on the Common Stock, there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock.

(g) The Company has been duly organized and is validly existing as a corporation under the laws of the State of Wisconsin and has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus and to enter into and perform its obligations under this Agreement; and the Company is duly qualified as a foreign corporation to transact business and is in good standing in each other jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not result in a Material Adverse Effect.

(h) Each “significant subsidiary” of the Company (as such term is defined in Rule 1-02 of Regulation S-X) is listed on Exhibit 21.1 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (each such subsidiary shall be referred to herein as a “Significant Subsidiary” and, collectively, the “Significant Subsidiaries”). Each Significant Subsidiary has been duly organized and is validly existing as a corporation or a limited liability company under the laws of the jurisdiction of its formation, has corporate or other power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus and is duly qualified to transact business and is in good standing in each foreign jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure so to qualify or to be in good standing would not result in a Material Adverse Effect; except as otherwise disclosed in the Registration Statement, all of the outstanding equity interests of each such Significant Subsidiary have been duly authorized and validly issued and all of the issued and outstanding shares of the capital stock of each such Significant Subsidiary are owned by the Company, free and clear of any security interest, mortgage, pledge or lien that reasonably would be expected to result in a Material Adverse Effect. None of the outstanding equity interests of any Significant Subsidiary was issued in violation of the preemptive or similar rights of any other holder of equity interests of such Significant Subsidiary that reasonably would be expected to result in a Material Adverse Effect. The only subsidiaries of the Company are (i) the Significant Subsidiaries and (ii) certain other subsidiaries which do not constitute a “significant subsidiary” of the Company as defined in Rule 1-02 of Regulation S-X.

(i) The Company has an authorized capitalization as set forth in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus. All the outstanding shares of capital stock of the Company have been duly and validly authorized and issued and are fully paid and non-assessable and were not issued in violation of any preemptive or similar rights; except (i) as described in or expressly contemplated by the Registration Statement, the

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Prospectus and any Permitted Free Writing Prospectus and (ii) for options, restricted stock and performance shares and other awards granted pursuant to the Company Stock Plans, there are no outstanding rights (including, without limitation, preemptive or similar rights), warrants or options to acquire, or instruments convertible into or exchangeable for, any shares of capital stock or other equity interests of the Company or any of its consolidated subsidiaries, nor any contracts, commitments, agreements, understandings or arrangements of any kind relating to the issuance of any capital stock or other equity interest of the Company or any such subsidiary, any such convertible or exchangeable securities or any such rights, warrants or options; and the capital stock of the Company and the Company’s charter and bylaws conform in all material respects to the descriptions thereof contained in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus; and all the outstanding shares of capital stock or other equity interests of each consolidated subsidiary owned, directly or indirectly, by the Company have been duly and validly authorized and issued, are fully paid and non-assessable and are owned directly or indirectly by the Company, free and clear of any lien, charge, encumbrance, security interest, restriction on voting or transfer or any other claim of any third party (each, a “Lien”), other than Liens that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. The Company is a “holding company” as defined under the Public Utility Holding Company Act of 2005.

(j) With respect to the stock options, if any (the “Stock Options”), granted pursuant to the stock-based compensation plans of the Company and its subsidiaries (the “Company Stock Plans”), (i) each Stock Option intended to qualify as an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”), so qualifies; (ii) each grant of a Stock Option was duly authorized no later than the date on which the grant of such Stock Option was by its terms to be effective (the “Grant Date”) by all necessary corporate action, including, as applicable, approval by the board of directors of the Company (or a duly constituted and authorized committee thereof) and any required stockholder approval by the necessary number of votes or written consents, and the award agreement governing such grant (if any) was duly executed and delivered by each party thereto; (iii) each such grant was made in accordance in all material respects with the terms of the Company Stock Plans, the Exchange Act and all other applicable laws and regulatory rules or requirements, including the rules of the Exchange and any other exchange on which Company securities are traded, and (iv) each such grant was properly accounted for in accordance with GAAP in the financial statements (including the related notes) of the Company and disclosed in the Company’s filings with the Commission in accordance with the Exchange Act and all other applicable laws. The Company has not knowingly granted, and there is no and has been no policy or practice of the Company of granting, Stock Options prior to, or otherwise coordinating the grant of Stock Options with, the release or other public announcement of material information regarding the Company or its subsidiaries or their results of operations or prospects.

(k) The Company has all requisite corporate power and authority to execute and deliver this Agreement and any Terms Agreement and to perform its obligations hereunder and thereunder; and all action required to be taken for the due and proper authorization, execution and delivery by the Company of this Agreement and any Terms Agreement and the consummation by it of the transactions contemplated hereby and thereby has been duly and validly taken (or, in the case of any Terms Agreement, such action will have been duly and validly authorized).

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(l) This Agreement has been duly authorized, executed and delivered by the Company and any Terms Agreement will have been duly authorized, executed and delivered by the Company.

(m) The Shares to be issued and sold by the Company hereunder or under any Terms Agreement have been duly authorized by the Company and, when issued and delivered and paid for in the manner provided for herein or in any Terms Agreement, as the case may be, will be duly and validly issued, will be fully paid and nonassessable and will conform to the description thereof in the Registration Statement, the Prospectus, and any Permitted Free Writing Prospectus. No holder of the Shares will be subject to personal liability by reason of being such a holder.

(n) This Agreement conforms and each Terms Agreement will conform in all material respects to the description thereof contained in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus.

(o) Neither the Company nor any of its consolidated subsidiaries is (i) in violation of its charter or by-laws; (ii) in default in the performance or observance of any obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease or other agreement or instrument to which the Company or any of its consolidated subsidiaries is a party or by which it or any of them may be bound, or to which any of the property or assets of the Company or any of its consolidated subsidiaries is subject (collectively, “Agreements and Instruments”) except for any such defaults with respect to this clause (ii) that would not result in a Material Adverse Effect; and the execution, delivery and performance by the Company of this Agreement and any Terms Agreement, the consummation of the transactions contemplated herein and in the Registration Statement (including the issuance and sale of the Shares and the use of proceeds from the sale of the Shares as described in the Prospectus), and compliance by the Company with its obligations hereunder do not and will not, whether with or without the giving of notice or passage of time or both, conflict with or constitute a breach of, or default or Repayment Event (as defined below) under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Company or any of its consolidated subsidiaries pursuant to, the Agreements and Instruments except for such conflicts, breaches or defaults or liens, charges or encumbrances that, singly or in the aggregate, would not result in a Material Adverse Effect, nor will such action result in any violation of the provisions of (A) the charter or bylaws of the Company or any of its consolidated subsidiaries or (B) any applicable law, statute, rule, regulation, judgment, order, writ or decree of any government, government instrumentality or court, domestic or foreign, having jurisdiction over the Company or any of its consolidated subsidiaries or any of their assets, properties or operations, except for any such violations with respect to this clause (B) as would not, individually or in the aggregate, result in a Material Adverse Effect. As used herein, a “Repayment Event” means any event or condition which gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company or any of its consolidated subsidiaries.

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(p) No filing with, or authorization, approval, consent, license, order, registration, qualification or decree of any court or governmental authority or agency is necessary or required for the performance by the Company of its obligations under this Agreement or any Terms Agreement, the consummation of the transactions contemplated by this Agreement or any Terms Agreement, except (i) such as have been already obtained, (ii) such as may be required under the Act or state securities laws, and (iii) such consents, approvals or authorizations as may be required under the rules of the Exchange or the rules of the Financial Industry Regulatory Authority (“FINRA”).

(q) Except as described in the Registration Statement and the Prospectus, there is no action, suit, proceeding, inquiry or investigation before or brought by any court or governmental agency or body, domestic or foreign, now pending, or, to the knowledge of the Company, threatened, against or affecting the Company or any of its consolidated subsidiaries which might reasonably be expected to result in a Material Adverse Effect, or which might reasonably be expected to materially and adversely affect (i) the properties or assets of the Company and its consolidated subsidiaries or (ii) the consummation of the transactions contemplated by this Agreement or any Terms Agreement, or the performance by the Company of its obligations hereunder or thereunder. The aggregate of all pending legal or governmental proceedings to which the Company or any of its consolidated subsidiaries is a party or of which any of their respective property or assets is the subject which are not described in the Prospectus, including ordinary routine litigation incidental to the business of the Company and its consolidated subsidiaries, could not reasonably be expected to result in a Material Adverse Effect. The Registration Statement is not the subject of a pending proceeding or examination under Section 8(d) or 8(e) of the Act, and the Company is not the subject of a pending proceeding under Section 8A of the Act in connection with the offering of the Shares.

(r) There are no contracts or documents which are required to be described in the Registration Statement or the Prospectus, or the documents incorporated by reference therein or to be filed as exhibits thereto, which have not been so described and filed as required, except for this Agreement and an opinion of Perkins Coie LLP with respect to the validity of the Shares, which shall be filed with the Commission as exhibits to a Current Report on Form 8-K, in accordance with the Exchange Act.

(s) Deloitte & Touche LLP, which has audited certain financial statements of the Company and its consolidated subsidiaries and delivered its report with respect to the audited financial statements of the Company and its consolidated subsidiaries and related schedules included or incorporated by reference in the Registration Statement and the Prospectus, is an independent registered public accounting firm with respect to the Company and its consolidated subsidiaries as required by the Act and by the rules of the Public Company Accounting Oversight Board.

(t) The Company and its consolidated subsidiaries have good and marketable title to all real property owned by the Company and its consolidated subsidiaries and good title to all other properties owned by them, in each case free and clear of all mortgages, pledges, liens, security interests, claims, restrictions or encumbrances of any kind except such as (i) are described in the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus or (ii) do not, singly or in the aggregate, materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company or any of its consolidated subsidiaries; and all of the leases and subleases material to the business of the Company and its consolidated subsidiaries, considered as one enterprise, and under which the

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Company or any of its consolidated subsidiaries holds properties described in the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus are in full force and effect, and neither the Company nor any of its consolidated subsidiaries has any notice of any claim of any sort that has been asserted by anyone adverse to the rights of the Company or any of its consolidated subsidiaries under any of the leases or subleases mentioned above, or affecting or questioning the rights of the Company or any of its consolidated subsidiaries to the continued possession of the leased or subleased premises under any such lease or sublease, except where such would not have a Material Adverse Effect.

(u) No relationship, direct or indirect, exists between or among the Company or any of its subsidiaries, on the one hand, and the directors, officers, security holders, customers or suppliers of the Company or any of its subsidiaries, on the other, that is required by the Act to be described in the Registration Statement and the Prospectus and that is not so described in such documents and in any Permitted Free Writing Prospectus.

(v) The Company is not and, upon the issuance and sale of the Shares as herein contemplated and the application of the net proceeds therefrom as described in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, will not be required to register as an “investment company” under the Investment Company Act of 1940, as amended, and the rules and regulations of the Commission thereunder (collectively, the “Investment Company Act”).

(w) The Company and its consolidated subsidiaries have paid all federal, state, local and foreign taxes (other than those (i) that are being contested in good faith and for which adequate reserves have been established in accordance with GAAP or (ii) that, if not paid, would not have a Material Adverse Effect) and filed (or obtained extensions with respect to) all tax returns required to be paid or filed; and except as otherwise disclosed in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, there is no tax deficiency that has been, or could reasonably be expected to be, asserted against the Company or any of its consolidated subsidiaries or any of their respective properties or assets that would have a Material Adverse Effect.

(x) The Company and its consolidated subsidiaries possess such permits, licenses, approvals, consents and other authorizations (collectively, “Governmental Licenses”) issued by the appropriate federal, state, local or foreign governmental or regulatory agencies or bodies necessary to conduct the businesses now operated by them in the manner described in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, except where the failure to possess any such Governmental Licenses would not have a Material Adverse Effect. The Company and its consolidated subsidiaries are in compliance with the terms and conditions of all such Governmental Licenses, except where the failure to so possess or comply would not, singly or in the aggregate, have a Material Adverse Effect. All of the Governmental Licenses are valid and in full force and effect, except where the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not have a Material Adverse Effect; and neither the Company nor any of its consolidated subsidiaries has received any notice of proceedings related to the revocation or modification of any such Governmental Licenses which, singly or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would result in a Material Adverse Effect.

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(y) No labor dispute with the employees of the Company or any of its consolidated subsidiaries exists or, to the knowledge of the Company, is imminent, and the Company is not aware of any existing or imminent labor disturbance by the employees of any of its or any of its consolidated subsidiaries’ respective principal suppliers, manufacturers, customers or contractors, which, in either case, would reasonably be expected to result in a Material Adverse Effect.

(z) Except as described in the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus and except as would not, singly or in the aggregate, result in a Material Adverse Effect, (i) neither the Company nor any of its consolidated subsidiaries is in violation of any federal, state, local or foreign statute, law, rule, regulation, ordinance, code, policy or rule of common law or any judicial or administrative interpretation thereof, including any judicial or administrative order, consent, decree or judgment, relating to pollution or protection of human health, the environment (including, without limitation, ambient air, surface water, groundwater, land surface or subsurface strata) or wildlife, including, without limitation, laws and regulations relating to the release or threatened release of chemicals, pollutants, contaminants, wastes, toxic substances, hazardous substances, petroleum or petroleum products (collectively, “Hazardous Materials”) or to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Hazardous Materials (collectively, “Environmental Laws”); (ii) the Company and its consolidated subsidiaries have all permits, authorizations and approvals required under any applicable Environmental Laws and are each in compliance with their requirements; (iii) there are no pending or, to the knowledge of the Company, threatened administrative, regulatory or judicial actions, suits, demands, demand letters, claims, liens, notices of noncompliance or violation, investigation or proceedings relating to any Environmental Law against the Company or any of its consolidated subsidiaries and (iv) there are no events or circumstances that might reasonably be expected to form the basis of an order for clean-up or remediation, or an action, suit or proceeding by any private party or governmental body or agency, against or affecting the Company or any of its consolidated subsidiaries relating to Hazardous Materials or any Environmental Laws.

(aa) Except for noncompliance that could not reasonably be expected to result in a Material Adverse Effect, (i) each employee benefit plan, within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), for which the Company or any member of its “Controlled Group” (defined as any organization which is a member of a controlled group of corporations within the meaning of Section 414 of the Internal Revenue Code of 1986, as amended (the “Code”)) would have any liability (each, a “Plan”) has been maintained in compliance with its terms and the requirements of any applicable statutes, orders, rules and regulations, including but not limited to ERISA and the Code; (ii) no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has occurred with respect to any Plan excluding transactions effected pursuant to a statutory or administrative exemption; (iii) for each Plan that is subject to the funding rules of Section 412 of the Code or Section 302 of ERISA, the minimum funding standard of Section 412 of the Code or Section 302 of ERISA, as applicable, has been satisfied (without taking into account any waiver thereof or extension of any amortization period) and is reasonably expected to be satisfied in the future (without taking into account any waiver thereof or extension of any amortization period); (iv) the fair value of the assets of each Plan and the benefit obligations accrued under such Plan have been properly accounted for in accordance with GAAP on the financial statements of the

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Company and its consolidated subsidiaries; (v) no “reportable event” (within the meaning of Section 4043(c) of ERISA) has occurred or is reasonably expected to occur; (vi) neither the Company nor any member of the Controlled Group has incurred, nor reasonably expects to incur, any liability under Title IV of ERISA (other than contributions to the Plan or premiums to the Pension Benefit Guaranty Corporation (“PBGC”), in the ordinary course and without default) in respect of a Plan (including a “multiemployer plan”, within the meaning of Section 4001(a)(3) of ERISA); and (vii) there is no pending audit or investigation by the Internal Revenue Service, the U.S. Department of Labor, the PBGC or any other governmental agency or any foreign regulatory agency with respect to any Plan. To the knowledge of the Company, none of the following events has occurred or is reasonably likely to occur: (x) a material increase in the aggregate amount of contributions required to be made to all Plans by the Company or its consolidated subsidiaries in the current fiscal year of the Company and its consolidated subsidiaries compared to the amount of such contributions made in the Company and its consolidated subsidiaries’ most recently completed fiscal year; or (y) a material increase in the Company and its consolidated subsidiaries’ “accumulated post-retirement benefit obligations” (within the meaning of Statement of Financial Accounting Standards 106) compared to the amount of such obligations in the Company and its consolidated subsidiaries’ most recently completed fiscal year.

(bb) The Company together with its consolidated subsidiaries maintains a system of internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences and (v) interactive data in eXtensible Business Reporting Language (“XBRL Data”) included or incorporated by reference in the Registration Statement fairly presents the information called for in all material respects and is prepared in accordance with the Commission’s rules and guidelines applicable thereto. Except as described in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, since the end of the Company’s most recent audited fiscal year, there has been no material weakness in the Company’s internal control over financial reporting (whether or not remediated) and no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

The Company together with its consolidated subsidiaries employs disclosure controls and procedures that are designed to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Commission’s rules and forms, and is accumulated and communicated to the Company’s management, including its principal executive officer or officers and principal financial officer or officers, as appropriate, to allow timely decisions regarding disclosure.

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(cc) The Company and its consolidated subsidiaries have insurance covering their respective properties, operations, personnel and businesses, which insurance is in amounts and insures against such losses and risks as are adequate to protect the Company and its consolidated subsidiaries and their respective businesses; and neither the Company nor any of its consolidated subsidiaries has (i) received notice from any insurer or agent of such insurer that capital improvements or other expenditures are required or necessary to be made in order to continue such insurance or (ii) any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage at reasonable cost from similar insurers as may be necessary to continue its business.

(dd) Neither the Company nor any of its consolidated subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or any of its consolidated subsidiaries, has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to domestic political activity; (ii) made or taken an act in furtherance of an offer, promise or authorization of any direct or indirect unlawful payment or benefit to any foreign or domestic government official or employee, including of any government-owned or controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of any of the foregoing, or any political party or party official or candidate for political office; (iii) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977, as amended (the “FCPA”), or any applicable law or regulation implementing the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions, or committed an offence under the Bribery Act 2010 of the United Kingdom or any other applicable anti-bribery or anti-corruption law; or (iv) made, offered, agreed to, requested or taken an act in furtherance of any unlawful bribe or other unlawful benefit, including, without limitation, any rebate, payoff, influence payment, kickback or other unlawful or improper payment or benefit. The Company and its subsidiaries have instituted and maintain policies and procedures to ensure compliance with all applicable anti-bribery and anti-corruption laws. Neither the Company nor its consolidated subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or its consolidated subsidiaries will use any part of the proceeds from the sale of the Shares, directly or indirectly, in violation of the FCPA or the rules or regulations thereunder.

(ee) The operations of the Company and its consolidated subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements, including those of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the applicable money laundering statutes of all jurisdictions where the Company or any of its consolidated subsidiaries conducts business, the rules and regulations thereunder and any related or similar rules or regulations issued, administered or enforced by any governmental agency (collectively, the “Anti-Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Anti-Money Laundering Laws is pending or, to the knowledge of the Company, threatened.

(ff) Neither the Company nor any of its consolidated subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or any of its consolidated subsidiaries is, or is controlled or 50% or more owned by or is acting on behalf of, an individual or entity that is, currently the subject or the target of any sanctions administered or enforced by the U.S. government, (including, without limitation, the Office of Foreign Assets Control of the U.S. Department of

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the Treasury (“OFAC”) or the U.S. Department of State and including, without limitation, the designation as a “specially designated national” or “blocked person”), the United Nations Security Council (“UNSC”), the European Union, His Majesty’s Treasury (“HMT”) or other relevant sanctions authority (collectively, “Sanctions”), nor is the Company or any of its consolidated subsidiaries located, organized or resident in a country or territory that is currently the subject or target of Sanctions, including, without limitation, the so-called Donetsk People’s Republic, the so-called Luhansk People’s Republic, and the Crimea regions of Ukraine, Cuba, Iran, North Korea and Syria (each, a “Sanctioned Country” and together, the “Sanctioned Countries”); and the Company will not directly or indirectly use the proceeds of the offering of the Shares hereunder, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity (i) to fund or facilitate any activities of or business with any person that, at the time of such funding or facilitation, is the subject or target of Sanctions; (ii) to fund or facilitate any activities of or business in any Sanctioned Country; or (iii) in any other manner that will result in a violation by any person (including any person participating in the transaction, whether as underwriter, advisor, investor or otherwise) of Sanctions. As of the date hereof, the Company and its consolidated subsidiaries have not knowingly engaged in, are not now knowingly engaged in and will not knowingly engage in any dealings or transactions with any person that at the time of the dealing or transaction is or was the subject or the target of Sanctions or with any of the Sanctioned Countries.

(gg) Except as described in or expressly contemplated by the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, no consolidated subsidiary of the Company is currently prohibited, directly or indirectly, under any agreement or other instrument to which it is a party or is subject, from paying any dividends to the Company, from making any other distribution on such subsidiary’s capital stock, from repaying to the Company any loans or advances to such subsidiary from the Company.

(hh) Neither the Company nor any of its consolidated subsidiaries is a party to any contract, agreement or understanding with any person (other than this Agreement or any Terms Agreement) that would give rise to a valid claim against the Company or any of its consolidated subsidiaries or the Agents for a brokerage commission, finder’s fee or like payment in connection with the offering and sale of the Shares.

(ii) No person has the right to require the Company or any of its consolidated subsidiaries to register any securities for sale under the Act by reason of the filing of the Registration Statement with the Commission or the offering, issuance or sale of the Shares.

(jj) Neither the Company nor any consolidated subsidiary or affiliate of the Company has taken nor will the Company or any consolidated subsidiary or affiliate of the Company take, directly or indirectly, any action which is designed to or which has constituted or which would reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares.

(kk) The application of the proceeds received by the Company from the issuance, sale and delivery of the Shares as described in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus will not violate Regulation T, U or X of the Board of Governors of the Federal Reserve System or any other regulation of such Board of Governors.

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(ll) There is and has been no failure on the part of the Company or, to the knowledge of the Company, any of the Company’s directors or officers, in their capacities as such, to comply with any provision of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated in connection therewith (the “Sarbanes Oxley Act”), including Section 402 related to loans and Sections 302 and 906 related to certifications.

(mm) Nothing has come to the attention of the Company that has caused the Company to believe that the statistical and market-related data included in the Registration Statement, any Permitted Free-Writing Prospectus and the Prospectus is not based on or derived from sources that are reliable and accurate in all material respects.

(nn) All of the Shares that have been or may be sold under this Agreement and any Terms Agreement have been approved for listing, subject only to official notice of issuance, on the Exchange.

(oo) The Common Stock is an “actively-traded security” excepted from the requirements of Rule 101 of Regulation M under the Exchange Act by Rule 101(c)(1) thereunder.

(pp) Any certificate signed by any officer of the Company or any of its subsidiaries delivered to any Agent or to counsel to such Agent pursuant to or in connection with this Agreement or any Terms Agreement shall be deemed a representation and warranty by the Company to such Agent as to the matters covered thereby.

(qq) The Company and its subsidiaries’ information technology assets and equipment, computers, systems, networks, hardware, software, websites, applications, and databases (collectively, “IT Systems”) are adequate for, and operate and perform in all material respects as required in connection with the operation of the business of the Company and its subsidiaries as currently conducted, free and clear of all material bugs, errors, defects, Trojan horses, time bombs, malware and other corruptants. The Company and its subsidiaries have implemented and maintained commercially reasonable controls, policies, procedures, and safeguards to maintain and protect their material confidential information and the integrity, continuous operation, redundancy and security of all IT Systems and data (including all personal, personally identifiable, sensitive, confidential or regulated data (“Personal Data”)) used in connection with their businesses, and there have been no breaches, violations, outages or unauthorized uses of or accesses to same, except for those that have been remedied without material cost or liability or the duty to notify any other person, nor any incidents under internal review or investigations relating to the same. The Company and its subsidiaries are presently in material compliance with all applicable laws or statutes and all judgments, orders, rules and regulations of any court or arbitrator or governmental or regulatory authority, internal policies and contractual obligations relating to the privacy and security of IT Systems and Personal Data and to the protection of such IT Systems and Personal Data from unauthorized use, access, misappropriation or modification.

(rr) The Company acknowledges and agrees that the Agents have informed the Company that any Agent may, to the extent permitted under the Act and the Exchange Act, purchase and sell Shares for its own account while this Agreement is in effect, and shall be under no obligation to purchase Shares on a principal basis pursuant to this Agreement, except as otherwise agreed by such Agent in the Transaction Proposal (as amended by the corresponding Transaction Acceptance, if applicable).

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4. Certain Covenants of the Company. The Company hereby agrees with the Agents:

(a) For so long as the delivery of a prospectus is required (whether physically or through compliance with Rule 172 under the Act or any similar rule) in connection with the offering or sale of Shares, before using or filing any Permitted Free Writing Prospectus and before using or filing any amendment or supplement to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus (in each case, other than due to the filing of an Incorporated Document), to furnish to the Agents a copy of each such proposed Permitted Free Writing Prospectus, amendment or supplement within a reasonable period of time before filing with the Commission or using any such Permitted Free Writing Prospectus, amendment or supplement and the Company will not use or file any such Permitted Free Writing Prospectus or any such proposed amendment or supplement to which any Agent reasonably objects, unless the Company’s legal counsel has advised the Company that use or filing of such document is required by law; and the Company will not use or file any such Permitted Free Writing Prospectus or proposed, amendment or supplement to which any Agent reasonably objects unless the Company’s legal counsel has advised the Company that use or filing of such document is required by law.

(b) To file the Prospectus, each Prospectus Supplement and any other amendments or supplements to the Prospectus pursuant to, and within the time period required by, Rule 424(b) under the Act (without reference to Rule 424(b)(8)) and to file any Permitted Free Writing Prospectus to the extent required by Rule 433 under the Act and to provide copies of the Prospectus, each Prospectus Supplement, any other amendments or supplements to the Prospectus and each Permitted Free Writing Prospectus (to the extent not previously delivered or filed on EDGAR) to the Agents via e-mail in “.pdf” format on such filing date to e-mail accounts designated by the Agents and, at any Agent’s request, to also furnish copies of the Prospectus, each Prospectus Supplement, any other amendments or supplements to the Prospectus and each Permitted Free Writing Prospectus to each exchange or market on which sales were effected as may be required by the rules or regulations of such exchange or market.

(c) To file timely all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act for so long as the delivery of a prospectus is required (whether physically or through compliance with Rule 172 under the Act or any similar rule) in connection with the offering or sale of the Shares, and during such same period to advise the Agents, promptly after the Company receives notice thereof, (i) of the time when any amendment to the Registration Statement has been filed or has become effective or any supplement to the Prospectus or any Permitted Free Writing Prospectus or any amended Prospectus has been filed with the Commission; (ii) of the issuance by the Commission of any stop order or any order preventing or suspending the use of any prospectus relating to the Shares or the initiation or threatening of any proceeding for that purpose, pursuant to Section 8A of the Act; (iii) of any objection by the Commission to the use of Form S-3ASR by the Company pursuant to Rule 401(g)(2) under the Act; (iv) of the suspension of the qualification of the Shares for offering or sale in any jurisdiction or of the initiation or threatening of any proceeding for any

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such purpose; (v) of any request by the Commission for the amendment of the Registration Statement or the amendment or supplementation of the Prospectus (in each case including any documents incorporated by reference therein) or for additional information; (vi) of the occurrence of any event as a result of which the Prospectus or any Permitted Free Writing Prospectus as then amended or supplemented includes any untrue statement of a material fact or omits to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances existing when the Prospectus or any such Permitted Free Writing Prospectus is delivered to a purchaser, not misleading; and (vii) of the receipt by the Company of any notice of objection of the Commission to the use of the Registration Statement or any post-effective amendment thereto.

(d) In the event of the issuance of any such stop order or of any such order preventing or suspending the use of any such prospectus or suspending any such qualification, or of any notice of objection pursuant to Rule 401(g)(2) under the Act, to use promptly its commercially reasonable efforts to obtain its withdrawal.

(e) To furnish such information as may be required and otherwise cooperate in qualifying the Shares for offering and sale under the securities or blue sky laws of such states or other jurisdictions as any Agent may reasonably designate and to maintain such qualifications in effect so long as required for the distribution of the Shares; provided that the Company shall not be required to qualify as a foreign corporation, become a dealer of securities, or become subject to taxation in, or to consent to the service of process under the laws of, any such state or other jurisdictions (except service of process with respect to the offering and sale of the Shares); and to promptly advise the Agents of the receipt by the Company of any notification with respect to the suspension of the qualification of the Shares for sale in any jurisdiction or the initiation of any proceeding for such purpose.

(f) To make available to the Agents, at their respective offices in New York City, without charge, as soon as reasonably practicable after the Registration Statement becomes effective, and thereafter from time to time to furnish to the Agents, as many copies of the Prospectus and the Prospectus Supplement (or of the Prospectus or Prospectus Supplement as amended or supplemented if the Company shall have made any amendments or supplements thereto and documents incorporated by reference therein after the effective date of the Registration Statement) and each Permitted Free Writing Prospectus as the Agents may reasonably request for so long as the delivery of a prospectus is required (whether physically or through compliance with Rule 172 under the Act or any similar rule); and for so long as this Agreement is in effect, the Company will prepare and file promptly such amendment or amendments to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus as may be necessary to comply with the requirements of Section 10(a)(3) of the Act.

(g) To furnish or make available to the Agents during the Term (i) copies of any reports or other communications which the Company shall send generally to its security holders or shall from time to time publish or publicly disseminate and, in each case, file with the Commission pursuant to the Exchange Act, and (ii) copies of all annual, quarterly and current reports filed with the Commission on Forms 10-K, 10-Q and 8-K, or such other similar form as may be designated by the Commission, and to furnish to any Agent from time to time during the Term such other information as such Agent may reasonably request regarding the Company or

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its subsidiaries, in each case as soon as reasonably practicable after such reports, communications, documents or information becomes available or promptly upon the request of such Agent, as applicable; provided, however, that the Company shall have no obligation to provide the Agents with any document filed on EDGAR or included on the Company’s Internet website.

(h) If, at any time during the Term, any event shall occur or condition shall exist as a result of which it is necessary in the reasonable opinion of counsel for the Agents or counsel for the Company, to further amend or supplement the Prospectus or any Permitted Free Writing Prospectus as then amended or supplemented in order that the Prospectus or any such Permitted Free Writing Prospectus will not include an untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading, in light of the circumstances existing at the time the Prospectus or any such Permitted Free Writing Prospectus is delivered to a purchaser, or if it shall be necessary, in the reasonable opinion of either such counsel, to amend or supplement the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus in order to comply with the requirements of the Act, in the case of such a determination by counsel to the Company, immediate notice shall be given, and confirmed in writing, to the Agents to cease the solicitation of offers to purchase the Shares in each Agent’s capacity as agent, and, in either case, the Company will, subject to Section 4(a) above, promptly prepare and file with the Commission such amendment or supplement, whether by filing documents pursuant to the Act, the Exchange Act or otherwise, as may be necessary to correct such untrue statement or omission or to make the Registration Statement, the Prospectus or any such Permitted Free Writing Prospectus comply with such requirements.

(i) To generally make available to its security holders as soon as reasonably practicable, but not later than 16 months after the first day of each fiscal quarter referred to below, an earnings statement (in form complying with the provisions of Section 11(a) under the Act and Rule 158 of the Commission promulgated thereunder) covering each twelve-month period beginning, in each case, not later than the first day of the Company’s fiscal quarter next following each “effective date” (as defined in such Rule 158) of the Registration Statement with respect to each sale of Shares.

(j) To apply the net proceeds from the sale of the Shares in the manner described in the Prospectus Supplement under the caption “Use of Proceeds.”

(k) Not to, and to cause its subsidiaries not to, take, directly or indirectly, any action designed to cause or result in, or that constitutes or might reasonably be expected to constitute, the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares; provided that nothing herein shall prevent the Company from filing or submitting reports under the Exchange Act or issuing press releases in the ordinary course of business.

(l) Except as otherwise agreed between the Company and the Agents, to pay all costs, expenses, fees and taxes in connection with (i) the preparation and filing of the Registration Statement, the Prospectus, any Permitted Free Writing Prospectus, and any amendments or supplements thereto, and the printing and furnishing of copies of each thereof to

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the Agents and to dealers (including costs of mailing and shipment); (ii) the registration, issue and delivery of the Shares; (iii) the qualification of the Shares for offering and sale under the securities or blue sky laws of such states or other jurisdictions as the Agents may reasonably designate as aforesaid (including filing fees and the reasonable and documented legal fees and disbursements of a single outside counsel to the Agents in connection therewith) and the printing and furnishing of copies of any blue sky surveys to the Agents; (iv) the listing of the Shares on the Exchange and any registration thereof under the Exchange Act; (v) any filing for review, and any review, of the public offering of the Shares by FINRA (including filing fees and the reasonable and documented legal fees and disbursements of a single outside counsel to the Agents in connection therewith); (vi) the fees and disbursements of counsel to the Company and of the Company’s independent registered public accounting firm; (vii) the performance of the Company’s other obligations hereunder and under any Terms Agreement; and (viii) the reasonable and documented out-of-pocket expenses of the Agents, including the reasonable and documented fees and disbursements of a single outside counsel to the Agents in connection with this Agreement and ongoing services in connection with the transactions contemplated hereunder. Except as otherwise provided in this Section 4(l) the Agents will pay all of their own costs and expenses incurred in connection with entering into this Agreement and the transactions contemplated by this Agreement.

(m) With respect to the offering(s) contemplated by this Agreement or any Terms Agreement, the Company will not offer shares of Common Stock or any securities convertible into or exchangeable or exercisable for shares of the Common Stock in a manner in violation of the Act or the Exchange Act; and the Company will not distribute any offering material in connection with the offer and sale of the Shares, other than the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus and any amendments or supplements thereto.

(n) Unless the Company has given written notice to the Agents that the Company has suspended activity under this Agreement and there are no pending Agency Transactions or Principal Transactions, the Company will not, without (A) giving the Agents at least three Exchange Business Days’ prior written notice specifying the nature of the proposed sale and the date of such proposed sale and (B) the Agents suspending activity under this program for such period of time as requested by the Company or deemed appropriate by the Agents in light of the proposed sale, (i) offer, pledge, announce the intention to sell, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or other equity securities of the Company or any securities convertible into or exercisable, redeemable or exchangeable for Common Stock or other equity securities of the Company, or file any registration statement under the Act with respect to any of the foregoing (other than a registration statement on Form S-8, a registration statement on Form S-3 relating to the Company’s Shareowner Direct Plan or other dividend reinvestment plan or a or post-effective amendment to the Registration Statement) or (ii) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of Common Stock or other equity securities of the Company, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of shares of Common Stock or other securities, in cash or otherwise. The foregoing sentence shall not apply to (A) the Shares to be offered and sold under this Agreement or any Terms Agreement, (B) any shares of Common

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Stock or other securities issued or delivered pursuant to any of the Company Stock Plans referred to in the Registration Statement and the Prospectus or upon the conversion, vesting or exercise of options, rights or other securities granted thereunder, (C) any shares of Common Stock offered and sold pursuant to the Company’s Shareowner Direct Plan or other dividend reinvestment plan referred to in the Registration Statement and the Prospectus, or (D) any shares of Common Stock or other securities issuable upon the conversion, exercise or exchange of warrants or other securities outstanding on the first Trading Day prior to the delivery by the Company to the applicable Agent of a Transaction Proposal to sell Shares hereunder and referred to in the Registration Statement and the Prospectus. Any lock-up provisions relating to a Principal Transaction shall be set forth in the applicable Terms Agreement.

(o) The Company will, pursuant to reasonable procedures developed in good faith, retain copies of each Permitted Free Writing Prospectus that is not filed with the Commission in accordance with Rule 433 under the Act.

(p) The Company will use commercially reasonable efforts to cause the Shares to be listed on the Exchange.

(q) The Company consents to any Agent trading in the Common Stock for such Agents’ own account and for the account of such Agent’s clients at the same time as sales of the Shares occur pursuant to this Agreement or any Terms Agreement.

(r) If immediately prior to the third anniversary (the “Renewal Deadline”) of the initial effective date of the Registration Statement, the aggregate Gross Sales Price of Shares sold by the Company is less than the Maximum Amount and this Agreement has not expired or been terminated, the Company will, prior to the Renewal Deadline, file, if it has not already done so and is eligible to do so, a new automatic shelf registration statement relating to the Shares, in a form reasonably satisfactory to the Agents. If the Company is no longer eligible to file an automatic shelf registration statement, the Company will, prior to the Renewal Deadline, if it has not already done so, file a new shelf registration statement relating to the Shares, in a form reasonably satisfactory to the Agents, and will use its commercially reasonable efforts to cause such registration statement to be declared effective within 60 days after the Renewal Deadline. The Company will take all other commercially reasonable action necessary or appropriate to permit the issuance and sale of the Shares to continue as contemplated in the expired registration statement relating to the Shares. References herein to the Registration Statement shall include such new automatic shelf registration statement or such new shelf registration statement, as the case may be.

5. Execution of Agreement. The Agents’ obligations under this Agreement shall be subject to the satisfaction of the following conditions in connection with and on the date of the execution of this Agreement:

(a) the Company shall have delivered to the Agents:

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(b) The Agents shall have received a letter or letters, which shall include legal opinions and negative assurance statements, of Gibson, Dunn & Crutcher LLP, counsel to the Agents, addressed to the Agents and dated the date of this Agreement, addressing such matters as the Agents may reasonably request.

6. Additional Covenants of the Company. The Company further covenants and agrees with the Agents as follows:

(a) Each Transaction Proposal made by the Company that is accepted by the Agents by means of a Transaction Acceptance and each execution and delivery by the Company of a Terms Agreement shall be deemed to be (i) an affirmation that the representations, warranties and agreements of the Company herein contained and contained in any certificate delivered to the Agents pursuant hereto are true and correct at such Time of Acceptance or the date of such Terms Agreement, as the case may be, and (ii) an undertaking that such representations, warranties and agreements will be true and correct on any applicable Time of Sale and Settlement Date, as though made at and as of each such time (it being understood that such representations, warranties and agreements shall relate to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus as amended and supplemented to the time of such Transaction Acceptance or Terms Agreement, as the case may be).

(b) Each time that (i) except as provided in the last sentence of Section 2(a), the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus shall be amended or supplemented (including, except as noted in the proviso at the end of this Section 6(b), by the filing of any Incorporated Document); (ii) there is a Principal Settlement Date pursuant to a Terms Agreement; or (iii) except as provided in the last sentence of Section 2(a), the Agents shall reasonably request upon reasonable advance notice to the Company (each date referred to in clauses (i), (ii) and (iii) above and subject to the exceptions set forth therein,

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a “Bring-Down Delivery Date”), the Company shall, unless the Agents agree otherwise, furnish or cause to be furnished to the Agents certificates, dated as of such Bring-Down Delivery Date and delivered within five Exchange Business Days after the applicable Bring-Down Delivery Date or, in the case of a Bring-Down Delivery Date resulting from a Principal Settlement Date, delivered on such Principal Settlement Date, of the same tenor as the certificate referred to in Section 5(a)(i) hereof, modified as necessary to relate to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus as amended and supplemented to the time of delivery of such certificates, or, in lieu of such certificate, certificate to the effect that the statements contained in the certificate referred to in Section 5(a)(i) hereof furnished to Agents are true and correct as of such Bring-Down Delivery Date as though made at and as of such date (except that such statements shall be deemed to relate to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus as amended and supplemented to the time of delivery of such certificate); provided, however, that the filing of a Current Report on Form 8-K will not constitute a Bring-Down Delivery Date under clause (i) above unless either (A) (x) such Current Report on Form 8-K is filed at any time during which either a Transaction Acceptance is binding and the Company has not suspended the use thereof (and prior to the settlement of the Shares specified therein) or a prospectus relating to the Shares is required to be delivered under the Act (whether physically or through compliance with Rule 172 under the Act or any similar rule) or such Current Report on Form 8-K is filed at any time from and including the date of a Terms Agreement through and including the related Settlement Date and (y) the Agents have reasonably requested that such date be deemed to be a Bring-Down Delivery Date based upon the event or events reported in such Current Report on Form 8-K or (B) such Current Report on Form 8-K contains capsule financial information, historical or pro forma financial statements, supporting schedules or other financial data that shall be deemed to be “filed” for purposes of Section 18 of the Exchange Act; and provided, further, that an amendment or supplement to the Registration Statement or the Prospectus relating to the offering of other securities pursuant to the Registration Statement will not constitute a Bring-Down Delivery Date.

(c) Each Bring-Down Delivery Date, the Company shall, unless the Agents agree otherwise, cause to be furnished to the Agents (A) the written opinion and, if not included in such opinion, negative assurance letter of Perkins Coie LLP, counsel to the Company, dated as of the applicable Bring-Down Delivery Date and delivered within five Exchange Business Days after the applicable Bring-Down Delivery Date or, in the case of a Bring-Down Delivery Date resulting from a Principal Settlement Date, dated and delivered on such Principal Settlement Date, of the same tenor as the opinion and letter referred to in Section 5(a)(ii) hereof, but modified as necessary to relate to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus as amended and supplemented to the time of delivery of such opinion and letter, or, in lieu of such opinion and letter, such counsel shall furnish the Agents with a letter substantially to the effect that the Agents may rely on the opinion and letters of such counsel referred to in Section 5(a)(ii), furnished to the Agents, to the same extent as though they were dated the date of such letter authorizing reliance (except that statements in such last opinion and letter of such counsel shall be deemed to relate to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus as amended and supplemented to the time of delivery of such letter authorizing reliance).

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(d) Each Bring-Down Delivery Date, the Company shall, unless the Agents agree otherwise, cause Deloitte & Touche LLP to furnish to the Agents a “comfort” letter, dated as of the applicable Bring-Down Delivery Date and delivered within five Exchange Business Days after the applicable Bring-Down Delivery Date or, in the case of a Bring-Down Delivery Date resulting from a Principal Settlement Date, delivered on such Principal Settlement Date, of the same tenor as the letter referred to in Section 5(a)(iii) hereof, but modified to relate to the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus as amended and supplemented to the date of such letter, and, if the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus shall include or incorporate by reference the financial statements of any entity or business (other than the consolidated financial statements of the Company and its subsidiaries), the Company shall, if requested by the Agents, cause a firm of independent public accountants to furnish to the Agents a “comfort” letter, dated as of the applicable Bring-Down Delivery Date and delivered within five Exchange Business Days after the applicable Bring-Down Delivery Date or, in the case of a Bring-Down Delivery Date resulting from a Principal Settlement Date, delivered on such Principal Settlement Date, addressing such matters as the Agents may reasonably request.

(e) At the time the Company delivers a Transaction Proposal to any Agent (i) no order suspending the effectiveness of the Registration Statement shall be in effect, and no proceeding for such purpose or pursuant to Section 8A under the Act shall be pending before or, to the knowledge of the Company, threatened by the Commission; the Prospectus and each Permitted Free Writing Prospectus shall have been timely filed with the Commission under the Act (in the case of a Permitted Free Writing Prospectus, to the extent required by Rule 433 under the Act); and all requests by the Commission for additional information shall have been complied with to the satisfaction of the Agents and no suspension of the qualification of the Shares for offering or sale in any jurisdiction, or of the initiation or threatening of any proceedings for any of such purposes, shall have occurred and be in effect; and (ii) the Registration Statement, the Prospectus or any Permitted Free Writing Prospectus shall not contain an untrue statement of material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(f) Except as set forth in the last sentence of Section 2(a), the Company shall reasonably cooperate with any reasonable due diligence review requested by any Agent or its counsel from time to time in connection with the transactions contemplated hereby or any Terms Agreement, including, without limitation, (i) at the commencement of each intended Purchase Date and any Time of Sale or Settlement Date, providing information and making available appropriate documents and appropriate corporate officers of the Company and, upon reasonable request, representatives of Deloitte & Touche LLP (and, if the Registration Statement, the Prospectus or any Permitted Free-Writing Prospectus shall include or incorporate by reference the financial statements of any entity or business (other than the consolidated financial statements of the Company and its subsidiaries), representatives of the independent public accountants that audited or reviewed such financial statements) for an update on diligence matters with representatives of such Agent and (ii) at each Bring-Down Delivery Date and otherwise as such Agent may reasonably request, providing information and making available documents and appropriate corporate officers of the Company and representatives of Deloitte & Touche LLP (and, if the Registration Statement, the Prospectus or any Permitted Free-Writing Prospectus shall include or incorporate by reference the financial statements of any entity or business (other than the consolidated financial statements of the Company and its subsidiaries), representatives of the independent public accountants that audited or reviewed such financial statements) for one or more due diligence sessions with representatives of such Agent and its counsel.

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(g) The Company shall disclose, in its Quarterly Reports on Form 10-Q and in its Annual Report on Form 10-K and, if requested by the Agents, in supplements to the Prospectus to be filed by the Company with the Commission from time to time, the number of the Shares sold through the Agents under this Agreement and any Terms Agreement, and the gross and net proceeds to the Company from the sale of the Shares and the compensation paid by the Company with respect to sales of the Shares pursuant to this Agreement during the relevant quarter or, in the case of any such prospectus supplement, such shorter period as the Agents may reasonably request or, in the case of an Annual Report on Form 10-K, during the fiscal year covered by such Annual Report and the fourth quarter of such fiscal year.

All opinions, letters and other documents referred to in Sections 6(b) through (d) above shall be reasonably satisfactory in form and substance to the Agent. The Agent will provide the Company with such notice (which may be oral, and in such case, will be confirmed via e-mail as soon as reasonably practicable thereafter) as is reasonably practicable under the circumstances when requesting an opinion, letter or other document referred to in Sections 6(b) through (d) above.

7. Conditions of the Agents’ Obligation. The Agents’ obligation to solicit purchases on an agency basis for the Shares or otherwise take any action pursuant to a Transaction Acceptance and to purchase the Shares pursuant to any Terms Agreement shall be subject to the satisfaction of the following conditions:

(a) At the Time of Acceptance, at the time of the commencement of trading on the Exchange on the Purchase Date(s) and at the relevant Time of Sale and Agency Settlement Date, or with respect to a Principal Transaction pursuant to a Terms Agreement, at the time of execution and delivery of the Terms Agreement by the Company and at the relevant Time of Sale and Principal Settlement Date:

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(b) Within five Exchange Business Days after the applicable Bring-Down Delivery Date or, in the case of a Bring-Down Delivery Date resulting from a Principal Settlement Date, on such Principal Settlement Date, the Agents shall have received the officer’s certificates, opinions and negative assurance letters of counsel and “comfort” letters and other documents provided for under Sections 6(b) through (d), inclusive. For purposes of clarity and without limitation to any other provision of this Section 7 or elsewhere in this Agreement, the parties hereto agree that the Agents’ obligations, if any, to solicit purchases of Shares on an agency basis or otherwise take any action pursuant to a Transaction Acceptance shall, unless otherwise agreed in writing by the applicable Agent, be suspended during the period from and including a Bring-Down Delivery Date through and including the time that such Agent shall have received the documents described in the preceding sentence.

(c) Within five Exchange Business Days after the applicable Bring-Down Delivery Date or, in the case of a Bring-Down Delivery Date resulting from a Principal Settlement Date, on such Principal Settlement Date, with respect to which the Company is obligated to deliver a certificate described in Section 6(b) hereof for which no waiver is applicable, Gibson, Dunn & Crutcher LLP, counsel for the Agents, shall have furnished to the Agents (or, in the case of a Principal Settlement Date, to the applicable Agent) such written opinion or opinions, dated as of such date, with respect to such matters as the Agents or Agent, as applicable, may reasonably request, and such counsel shall have received such papers and information as they may reasonably request to enable them to pass upon such matters.

8. Termination.

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(ii) In the case of any sale by the Company pursuant to a Terms Agreement, the obligations of the Company pursuant to such Terms Agreement and this Agreement may not be terminated by the Company without the prior written consent of the applicable Agent.

(ii) In the case of any purchase by any Agent pursuant to a Terms Agreement, the obligations of such Agent pursuant to such Terms Agreement shall be subject to termination by such Agent at any time prior to or at the Principal Settlement Date if (A) since the time of execution of the Terms Agreement or the respective dates as of which information is given in the Registration Statement, the Prospectus and any Permitted Free-Writing Prospectus, (i) trading generally shall have been suspended or materially limited on or by any of the New York Stock Exchange, the Nasdaq Stock Market, the Chicago Board Options Exchange, the Chicago Mercantile Exchange or the Chicago Board of Trade; (ii) trading of any securities issued or guaranteed by the Company or any of its subsidiaries shall have been suspended on any exchange or in any over-the counter market; (iii) a general moratorium on commercial banking activities shall have been declared by federal or New York state authorities; (iv) there shall have occurred any outbreak or escalation of hostilities or any change in financial markets or any calamity or crisis, either within or outside the United States, that, solely in the case of events and conditions described in this clause (iv), in such Agent’s judgment, is material and adverse and makes it impracticable or inadvisable to proceed with the offering, sale or delivery of the Shares on the terms and in the manner contemplated in the Prospectus or such Terms Agreement. If such Agent elects to terminate its obligations pursuant to this Section 8(b)(ii), the Company shall be notified promptly in writing.

(c) This Agreement shall remain in full force and effect until the earliest of (A) termination of the Agreement pursuant to Section 8(a) or 8(b) above or otherwise by mutual written agreement of the parties, (B) such date that the Maximum Amount of Shares has been sold in accordance with the terms of this Agreement and any Terms Agreements and (C) the first anniversary of the date of this Agreement, in each case except that the provisions of Section 3, 4 (except that if no Shares have been previously sold hereunder or under any Terms Agreement, only Section 4(l)), 9, 13, 15 and 17 of this Agreement shall remain in full force and effect notwithstanding such termination.

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(d) Any termination of this Agreement shall be effective on the date specified in such notice of termination; provided that, notwithstanding the foregoing, such termination shall not be effective until the close of business on the date of receipt of such notice by the Agents or the Company, as the case may be, or such later date as may be required pursuant to Section 8(a) or (b). If such termination shall occur prior to the Settlement Date for any sale of Shares, such sale shall settle in accordance with the provisions of Section 2 hereof.

9. Indemnity and Contribution.

(a) The Company agrees to indemnify and hold harmless the Agents, their respective affiliates, directors and officers and each person, if any, who controls such Agents within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, from and against any and all losses, claims, damages and liabilities (including, without limitation, reasonable out of pocket legal fees and other reasonable expenses incurred in connection with any suit, action or proceeding or any claim asserted, as such fees and expenses are incurred), that arise out of, or are based upon, (i) any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement (or any amendment thereto) or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary in order to make the statements therein, not misleading or (ii) any untrue statement or alleged untrue statement of a material fact contained in the Prospectus (or any amendment or supplement thereto), any Permitted Free Writing Prospectus (or any amendment or supplement thereto), any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act or any road show as defined in Rule 433(h) under the Act (a “road show”), or caused by any omission or alleged omission to state therein a material fact necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading, in each case except insofar as such losses, claims, damages or liabilities arise out of, or are based upon, any untrue statement or omission or alleged untrue statement or omission made in reliance upon and in conformity with any information relating to the Agents furnished to the Company in writing by the Agents expressly for use therein, it being understood and agreed that the only such information furnished by the Agents consists of the information described as such in subsection (b) below.

(b) Each Agent, severally and not jointly, agrees to indemnify and hold harmless the Company, its directors and officers and each person, if any, who controls the Company within the meaning of Section 15 of the Act or Section 20 of the Exchange Act to the same extent as the indemnity set forth in paragraph (a) above, but only with respect to any losses, claims, damages or liabilities that arise out of, or are based upon, any untrue statement or omission or alleged untrue statement or omission made in reliance upon and in conformity with any information relating to the Agents furnished to the Company in writing by the Agents expressly for use in the Registration Statement (or any amendment thereto), the Prospectus (or any amendment or supplement thereto), any Permitted Free Writing Prospectus (or any amendment or supplement thereto) or any road show, it being understood and agreed upon that such information shall consist solely of the following: the information appearing in the fifth paragraph under the caption “Plan of Distribution” in the Prospectus Supplement.

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(c) If any suit, action, proceeding (including any governmental or regulatory investigation), claim or demand shall be brought or asserted against any person in respect of which indemnification may be sought pursuant to either Section 9(a) or 9(b) above, such person (the “Indemnified Person”) shall promptly notify the person against whom such indemnification may be sought (the “Indemnifying Person”) in writing; provided that the failure to notify the Indemnifying Person shall not relieve it from any liability that it may have under this Section 9 except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided, further, that the failure to notify the Indemnifying Person shall not relieve it from any liability that it may have to an Indemnified Person otherwise than under this Section 9. If any such proceeding shall be brought or asserted against an Indemnified Person and it shall have notified the Indemnifying Person thereof, the Indemnifying Person shall retain counsel reasonably satisfactory to the Indemnified Person (who shall not, without the consent of the Indemnified Person, be counsel to the Indemnifying Person) to represent the Indemnified Person and any others entitled to indemnification pursuant to this Section 9 that the Indemnifying Person may designate in such proceeding and shall pay the fees and expenses of such counsel related to such proceeding, as incurred. In any such proceeding, any Indemnified Person shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Indemnified Person unless (i) the Indemnifying Person and the Indemnified Person shall have mutually agreed to the contrary; (ii) the Indemnifying Person has failed within a reasonable time to retain counsel reasonably satisfactory to the Indemnified Person; (iii) the Indemnified Person shall have reasonably concluded that there may be legal defenses available to it that are different from or in addition to those available to the Indemnifying Person; or (iv) the named parties in any such proceeding (including any impleaded parties) included both the Indemnifying Person and the Indemnified Person and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is understood and agreed that the Indemnifying Person shall not, in connection with any proceeding or related proceeding in the same jurisdiction, be liable for the reasonable fees and expenses of more than one separate firm (in addition to any local counsel) for (A) the Agents and their respective affiliates, directors and officers and their respective control persons, if any, or (B) the Company, its directors, its officers who signed the Registration Statement and its control persons, if any, as the case may be, and that all such reasonable fees and expenses shall be paid or reimbursed as they are incurred. Any such separate firm for the Agents and their respective affiliates, directors and officers and their respective control persons, if any, shall be designated in writing by the Agents, and any such separate firm for the Company, its directors, its officers who signed the Registration Statement and its control persons, if any, shall be designated in writing by the Company. The Indemnifying Person shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the Indemnifying Person agrees to indemnify each Indemnified Person from and against any loss or liability by reason of such settlement or judgment. No Indemnifying Person shall, without the written consent of the Indemnified Person, effect any settlement of any pending or threatened proceeding in respect of which any Indemnified Person is or could have been a party and indemnification is or could have been sought hereunder by such Indemnified Person, unless such settlement (x) includes an unconditional release of such Indemnified Person, in form and substance reasonably satisfactory to such Indemnified Person, from all liability on claims that are the subject matter of such proceeding and (y) does not include any statement as to or any admission of fault, culpability or a failure to act by or on behalf of any Indemnified Person. Notwithstanding the foregoing sentence, if at any time an Indemnified Person shall have requested an Indemnifying Person to reimburse the Indemnified Person for fees and expenses of

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counsel as contemplated by this Section 9(c), the Indemnifying Person agrees that it shall be liable for any settlement of any proceeding effected without its written consent if (i) such settlement is entered into more than 30 days after receipt by such Indemnifying Person of the aforesaid request and (ii) such Indemnifying Person shall not have reimbursed the Indemnified Person in accordance with such request prior to the date of such settlement.

(d) If the indemnification provided for in Sections 9(a) and 9(b) above is unavailable to an Indemnified Person or insufficient in respect of any losses, claims, damages or liabilities referred to therein, then each Indemnifying Person under such Sections, in lieu of indemnifying such Indemnified Person thereunder, shall contribute to the amount paid or payable by such Indemnified Person as a result of such losses, claims, damages or liabilities (i) in such proportion as is appropriate to reflect the relative benefits received by the Company, on the one hand, and any Agent, on the other, from the offering of the Shares pursuant to this Agreement and any Terms Agreements or (ii) if the allocation provided by clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) but also the relative fault of the Company, on the one hand, and any Agent, on the other, in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative benefits received by the Company, on the one hand, and any Agent, on the other, shall be deemed to be in the same respective proportions as the net proceeds (before deducting expenses) received by the Company from the sale of the Shares pursuant to this Agreement and any Terms Agreements and the total discounts and commissions received by such Agent in connection therewith bear to the aggregate Gross Sales Price of such Shares. The relative fault of the Company, on the one hand, and any Agent, on the other, shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company, on the one hand, or by such Agent, on the other hand, and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

(e) The Company and the Agents agree that it would not be just and equitable if contribution pursuant to this Section 9 were determined by pro rata allocation or by any other method of allocation that does not take account of the equitable considerations referred to in Section 9(d) above. The amount paid or payable by an Indemnified Person as a result of the losses, claims, damages and liabilities referred to in Section 9(d) above shall be deemed to include, subject to the limitations set forth above, any legal or other expenses incurred by such Indemnified Person in connection with any such action or claim. Notwithstanding the provisions of this Section 9, in no event shall any Agent be required to contribute any amount in excess of the amount by which the total discounts and commissions received by such Agent with respect to the offering of the Shares pursuant to this Agreement and any Terms Agreements exceeds the amount of any damages that such Agent has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.

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(f) The remedies provided for in this Section 9 are not exclusive and shall not limit any rights or remedies which may otherwise be available to any Indemnified Person at law or in equity.

10. Notices. All notices and other communications under this Agreement and any Terms Agreement shall be in writing and shall be deemed to have been duly given if mailed or transmitted and confirmed by any standard form of communication, and, if to the Agents, shall be sufficient in all respects if delivered or sent to (i) Barclays Capital Inc., 745 Seventh Avenue, New York, New York 10019, Attention: Syndicate Registration (fax: (646) 834-8133), with a copy, in the case of any notice pursuant to Section 9(c), to the Director of Litigation, Office of the General Counsel, Barclays Capital Inc., 745 Seventh Avenue, New York, New York 10019, (ii) Mizuho Securities USA LLC, ATTN: Equity Capital Markets, 1271 Avenue of the Americas, 3rd Floor, New York, NY 10020, and (iii) Wells Fargo Securities, LLC, 500 West 33rd Street, New York, NY 10001, Attention: Equity Syndicate Department (fax no: (212) 214-5918), and, if to the Company, shall be sufficient in all respects if delivered or sent to it at 4902 North Biltmore Lane, Madison, Wisconsin 53718, Attn: Treasurer (email: ***@***). Notwithstanding the foregoing, Transaction Proposals shall be delivered by the Company to the Agents by telephone or email to (i) Barclays Capital Inc., 745 7th Avenue, New York, NY 10019, Attention: John Lembeck, Equity Capital Markets (email: ***@***); (ii) Mizuho Securities USA LLC, Attention: Equity Capital Markets (telephone number: (212) 205-7600; email: ***@***), or (iii) Wells Fargo Securities, LLC, Attention: Jennifer Lynch (email: ***@***; telephone number: (212) 214-6122), Billy O’Connell (email: ***@***; telephone number: (212) 214-6127), Josie Callanan (email: ***@***; telephone number: (212) 214-6128), Michael Tiedemann (email: ***@***; telephone number: (212) 214-6375) and Kevin Fuller (email: ***@***; telephone number: (704) 410-1134); and Transaction Acceptances shall be delivered by the Agents to the Company by email to Melissa Kehoe (email: ***@***).

11. No Fiduciary Relationship. The Company acknowledges and agrees that the Agents are acting solely in the capacity of arm’s length contractual counterparties to the Company with respect to the offering of Shares contemplated hereby and any Terms Agreements (including in connection with determining the terms of the offering) and not as financial advisors or as fiduciaries to, or agents of, the Company or any other person. Additionally, the Agents are not advising the Company or any other person as to any legal, tax, investment, accounting or regulatory matters in any jurisdiction. The Company shall consult with its own advisors concerning such matters and shall be responsible for making its own independent investigation and appraisal of the transactions contemplated hereby, and the Agents shall have no responsibility or liability to the Company with respect thereto. Any review by the Agents of the Company, the transactions contemplated hereby or other matters relating to such transactions will be performed solely for the benefit of the Agents and shall not be on behalf of the Company.

12. Adjustments for Stock Splits. The parties acknowledge and agree that all share related numbers contained in this Agreement and the average daily trading volume limitation set forth in Section 2(a)(ii), any Transaction Proposal and any Transaction Acceptance shall be adjusted to take into account any stock split effected with respect to the Shares.

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13. Submission to Jurisdiction; Waiver of Jury Trial. No proceeding related to this Agreement or any Terms Agreement or any transactions contemplated hereby or thereby may be commenced, prosecuted or continued in any court other than the courts of the State of New York located in the City and County of New York or in the United States District Court for the Southern District of New York, which courts shall have jurisdiction over the adjudication of such matters, and the parties consent to the jurisdiction of such courts and personal service with respect thereto. The parties waive all right to trial by jury in any proceeding (whether based upon contract, tort or otherwise) in any way arising out of or relating to this Agreement or any Terms Agreement. The parties agree that a final judgment in any such proceeding brought in any such court shall be conclusive and binding upon the parties and may be enforced in any other courts to whose jurisdiction the parties are or may be subject, by suit upon such judgment.

14. Governing Law; Construction.

(a) This Agreement, any Terms Agreement and any claim, counterclaim or dispute of any kind or nature whatsoever arising out of or in any way relating to this Agreement or any Terms Agreement (each a “Claim”), directly or indirectly, shall be governed by, and construed in accordance with, the laws of the State of New York.

(b) The Section headings in this Agreement and any Terms Agreement have been inserted as a matter of convenience of reference and are not a part of this Agreement or any Terms Agreement.

15. Persons Entitled to Benefit of Agreement. This Agreement and any Terms Agreement shall inure to the benefit of and be binding upon the parties hereto and thereto, respectively, and their respective successors and the officers, directors, affiliates and controlling persons referred to in Section 9 hereof. Nothing in this Agreement or any Terms Agreement is intended or shall be construed to give any other person any legal or equitable right, remedy or claim under or in respect of this Agreement or any such Terms Agreement or any provision contained herein or therein. No purchaser of Shares from or through the Agents shall be deemed to be a successor merely by reason of purchase.

16. Counterparts. This Agreement and any Terms Agreement may be signed in counterparts (which may include counterparts delivered by any standard form of telecommunication), each of which shall be an original and all of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile, electronic mail (including any electronic signature covered by the U.S. federal ESIGN Act of 2000, Uniform Electronic Transactions Act, the Electronic Signatures and Records Act or other applicable law, e.g., www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes.

17. Survival. The respective indemnities, rights of contribution, representations, warranties and agreements of the Company and the Agents contained in this Agreement or any Terms Agreement or made by or on behalf of the Company or the Agents pursuant to this Agreement or any Terms Agreement or any certificate delivered pursuant hereto or thereto shall survive the delivery of and payment for the Shares and shall remain in full force and effect, regardless of any termination of this Agreement or any Terms Agreement or any investigation made by or on behalf of the Company or the Agents.

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18. Certain Defined Terms. For purposes of this Agreement, except where otherwise expressly provided, the term “affiliate” has the meaning set forth in Rule 405 under Act; the term “business day” means any day other than a day on which banks are permitted or required to be closed in New York City; and the term “subsidiary” has the meaning set forth in Rule 405 under the Act.

19. Amendments or Waivers. No amendment or waiver of any provision of this Agreement or any Terms Agreement, nor any consent or approval to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties hereto or thereto as the case may be.

20. Recognition of the U.S. Special Resolution Regimes.

(a) In the event that any Agent that is a Covered Entity (as defined below) becomes subject to a proceeding under a U.S. Special Resolution Regime (as defined below), the transfer from such Agent of this Agreement, and any interest and obligation in or under this Agreement, will be effective to the same extent as the transfer would be effective under the U.S. Special Resolution Regime if this Agreement, and any such interest and obligation, were governed by the laws of the United States or a state of the United States.

(b) In the event that any Agent that is a Covered Entity or a BHC Act Affiliate (as defined below) of such Agent becomes subject to a proceeding under a U.S. Special Resolution Regime, Default Rights (as defined below) under this Agreement that may be exercised against such Agent are permitted to be exercised to no greater extent than such Default Rights could be exercised under the U.S. Special Resolution Regime if this Agreement were governed by the laws of the United States or a state of the United States.

For purposes of this Section 20:

“BHC Act Affiliate” has the meaning assigned to the term “affiliate” in, and shall be interpreted in accordance with, 12 U.S.C. § 1841(k).

“Covered Entity” means any of the following:

“Default Right” has the meaning assigned to that term in, and shall be interpreted in accordance with, 12 C.F.R. §§ 252.81, 47.2 or 382.1, as applicable.

“U.S. Special Resolution Regime” means each of (i) the Federal Deposit Insurance Act and the regulations promulgated thereunder, and (ii) Title II of the Dodd-Frank Wall Street Reform and Consumer Protection Act and the regulations promulgated thereunder.

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21. Headings. The headings herein are included for convenience of reference only and are not intended to be part of, or to affect the meaning or interpretation of, this Agreement.

[Signature Page Follows]

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If the foregoing correctly sets forth the understanding between the Company and the Agents, please so indicate in the space provided below for that purpose, whereupon this letter and your acceptance shall constitute a binding agreement among the Company and the Agents.

[Signature Page to Distribution Agreement]

[Signature Page to Distribution Agreement]

Schedule A

Authorized Company Representatives

Robert Durian

Melissa Kehoe

Exhibit A

Alliant Energy Corporation Common Stock

TERMS AGREEMENT

_____________, 20__

Barclays Capital Inc.

745 7th Avenue

New York, NY 10019

Mizuho Securities USA LLC

1271 Avenue of the Americas, 3rd Floor

New York, NY 10020

Wells Fargo Securities, LLC

30 Hudson Yards, 14th Floor

New York, NY 10001

Dear Sirs:

Alliant Energy Corporation, a Wisconsin corporation (the “Company”), proposes, subject to the terms and conditions stated herein and in the Distribution Agreement dated December 14, 2022 (the “Distribution Agreement”) between the Company and Barclays Capital Inc., Mizuho Securities USA LLC and Wells Fargo Securities, LLC (the “Agents”), to issue and sell to the Agents the securities specified in the Schedule hereto (the “Purchased Securities”). Unless otherwise defined below, terms defined in the Distribution Agreement shall have the same meanings when used herein.

Each of the provisions of the Distribution Agreement not specifically related to the solicitation by the Agents, as agents of the Company, of offers to purchase securities is incorporated herein by reference in its entirety, and shall be deemed to be part of this Terms Agreement to the same extent as if such provisions had been set forth in full herein. Each of the representations, warranties and agreements set forth therein shall be deemed to have been made as of the date of this Terms Agreement and the Settlement Date set forth in the Schedule hereto.

An amendment to the Registration Statement or a supplement to the Prospectus, as the case may be, relating to the Purchased Securities, in the form heretofore delivered to the Agents, is now proposed to be filed with the Securities and Exchange Commission.

Subject to the terms and conditions set forth herein and in the Distribution Agreement which are incorporated herein by reference, the Company agrees to issue and sell to the Agent, and the latter agrees to purchase from the Company, the Purchased Securities at the time and place and at the purchase price set forth in the Schedule hereto.

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Notwithstanding any provision of the Distribution Agreement or this Terms Agreement to the contrary, the Company consents to the Agent trading in the Common Stock for the Agent’s own account and for the account of its clients at the same time as sales of the Purchased Securities occur pursuant to this Terms Agreement.

[Signature Page Follows]

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If the foregoing is in accordance with your understanding, please sign and return to us a counterpart hereof, whereupon this Terms Agreement, including those provisions of the Distribution Agreement incorporated herein by reference, shall constitute a binding agreement between the Agents and the Company.

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Schedule to Terms Agreement

Title of Purchased Securities:

Common Stock, par value $0.01 per share

Number of Shares of Purchased Securities:

[•] shares

Initial Price to Public:

$[•] per share

Purchase Price Payable by the Agent:

$[•] per share

Method of and Specified Funds for Payment of Purchase Price:

By wire transfer to a bank account specified by the Company in same day funds.

Method of Delivery:

To the Agent’s account, or the account of the Agent’s designee, at The Depository Trust Company via DWAC in return for payment of the purchase price.

Settlement Date:

[•], 20[•]

Closing Location:

[•]

Documents to be Delivered:

The following documents referred to in the Distribution Agreement shall be delivered on the Settlement Date as a condition to the closing for the Purchased Securities (which documents shall be dated on or as of the Settlement Date and shall be appropriately updated to cover any Permitted Free Writing Prospectuses and any amendments or supplements to the Registration Statement, the Prospectus, any Permitted Free Writing Prospectuses and any documents incorporated by reference therein):

(1) the officer’s certificate referred to in Section 5(a)(i);

(2) the opinions and negative assurance letters of the Company’s outside counsel and general counsel referred to in Section 5(a)(ii);

(3) the “comfort” letter referred to in Section 5(a)(iii);

(4) the opinion and negative assurance letter referred to in Section 5(b); and

(5) such other documents as the Agent shall reasonably request.

[Lockup:]

[•]

Time of sale: [•] [a.m./p.m.] (New York City time) on [•], [•]

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Time of sale information:

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Exhibit B

OFFICERS’ CERTIFICATE

Dated __________, 20__

We, Melissa Kehoe, the Treasurer of Alliant Energy Corporation, a Wisconsin corporation (the “Company”), and Robert J. Durian, the Executive Vice President and Chief Financial Officer of the Company, do hereby certify that this certificate is signed by us pursuant to the Distribution Agreement dated December 14, 2022 between the Company and Barclays Capital Inc., Mizuho Securities USA LLC and Wells Fargo Securities, LLC (the “Agreement”), and do hereby further certify on behalf of the Company, as follows:

1. The representations and warranties of the Company in the Agreement are true and correct on and as of the date hereof as though made on and as of this date;

2. The Company has performed all obligations and satisfied all covenants and conditions on its part to be performed or satisfied pursuant to the Agreement on or prior to the date hereof;

3. Since the respective dates as of which information is given in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus, except as otherwise stated therein, (i) neither the Company nor any of its consolidated subsidiaries has entered into any transaction or agreement (whether or not in the ordinary course of business) that is material to the Company and its consolidated subsidiaries taken as a whole or incurred any liability or obligation, direct or contingent, that is material to the Company and its consolidated subsidiaries taken as a whole; and (ii) neither the Company nor any of its consolidated subsidiaries has sustained any loss or interference with its business that is material to the Company and its consolidated subsidiaries taken as a whole and that is either from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor disturbance or dispute or any action, order or decree of any court or arbitrator or governmental or regulatory authority.

All capitalized terms used herein and not otherwise defined shall have the respective meanings assigned to them in the Agreement.

[Signature Page Follows]

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Exhibit C

FORM OF OPINION AND NEGATIVE ASSURANCE STATEMENT OF

PERKINS COIE LLP,

COUNSEL TO THE COMPANY

Opinions

1 The Registration Statement [has/and any post-effective amendments thereto have] become effective under the Act. The Prospectus [has/and any supplements thereto have] been filed pursuant to Rule 424(b) under the Act in the manner and within the time period required by such Rule 424(b) (without reference to Rule 424(b)(8)). Any required filing of any Permitted Free Writing Prospectus listed on Schedule 1 hereto has been made in the manner and within the time period required by Rule 433 under the Act. To our knowledge, no order suspending the effectiveness of the Registration Statement has been issued and no proceeding for that purpose has been instituted or is pending or threatened by the Commission.

2 Without independent verification of the factual accuracy, completeness or fairness of any statements made in the Registration Statement and the Prospectus, each of the Registration Statement and the Prospectus (except for the financial statements and financial schedules and other financial or accounting information included therein or omitted therefrom and for management’s report on the Company’s internal control over financial reporting included therein and the Statement of Eligibility of the Trustee on Form T-1 under the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”), as to which we express no opinion) appear on its face to be appropriately responsive in all material respects with the requirements of the Act.

3 The Company is a corporation validly existing under the laws of the State of Wisconsin.

4 The Company has the corporate power and corporate authority necessary to own, lease and operate its properties and to conduct its business as described in the Registration Statement and the Prospectus.

5 The Shares conform in all material respects to the description thereof set forth or incorporated by reference in the Registration Statement and the Prospectus.

6 The Company has the corporate power to enter into and perform the Distribution Agreement [Add the following if opinion is delivered in connection with a Terms Agreement — ; and the Company has the corporate power to enter into and perform the Subject Agreement]. The Distribution Agreement has been duly authorized by all necessary corporate action on the part of the Company, and has been duly executed and delivered by the Company [Add the following if opinion is delivered in connection with a Terms Agreement— and the Subject Agreement has been duly authorized by all necessary corporate action on the part of the Company, and has been duly executed and delivered by the Company].

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7 All of the Shares [Add the following if opinion is delivered in connection with a Terms Agreement— (including, without limitation, the Shares to be issued and sold pursuant to the Subject Agreement)] have been duly authorized for issuance and sale pursuant to the Distribution Agreement, and when issued and delivered by the Company pursuant to the Distribution Agreement [Add the following if opinion is delivered in connection with a Terms Agreement— and, in the case of the Shares to be issued and sold pursuant to the Subject Agreement, in accordance with the terms of the Subject Agreement] against payment of the consideration set forth therein, will be validly issued, fully paid and non-assessable.

8 No shareholder of the Company or any other person has any preemptive right, right of first refusal or other similar rights to subscribe for or purchase securities of the Company created under or pursuant to the Charter Documents or the Wisconsin Business Corporation Law.

9 The Company’s execution, delivery and performance of its obligations in the Distribution Agreement [Add the following if opinion is delivered in connection with a Terms Agreement— and the Subject Agreement] do not:

(a) violate statutory laws that counsel exercising customary professional judgment would in our experience reasonably recognize as typically applicable to agreements similar to the Distribution Agreement [Add the following if opinion is delivered in connection with a Terms Agreement— and the Subject Agreement] and transactions similar to those contemplated by the Distribution Agreement [Add the following if opinion is delivered in connection with a Terms Agreement— and the Subject Agreement], except for such violations that, according to the Back-Up Certificate, would not, individually or in the aggregate, have a Material Adverse Effect;

(b) violate the Charter Documents;

(c) breach or result in a default or Repayment Event under any Material Agreement, except for such breaches, defaults or Repayment Events that, according to the Back-Up Certificate would not, individually or in the aggregate, have a Material Adverse Effect;

(d) breach or violate any Material Court Order, except for such breaches or violations that, according to the Back-Up Certificate, would not, individually or in the aggregate, have a Material Adverse Effect; or

(e) violate Regulation T, U or X of the Board of Governors of the Federal Reserve System, provided in rendering this opinion as to such regulations we have assumed that (i) no credit is extended or maintained under the Distribution Agreement [Add the following if opinion is delivered in connection with a Terms Agreement— or the Subject Agreement] by a U.S. broker-dealer or other “creditor” (as defined in Regulation T) or “foreign branch of a broker-dealer” (within the meaning of Regulation X), and (ii) no proceeds from the sale of the Shares will be used for the immediate purpose of buying or carrying margin stock (within the meaning of Regulation U).

“Material Agreement” means any agreement identified by the Company as a material agreement in its Form 10-K filing with the Commission for the Company’s fiscal year ended December 31, 2021. “Material Court Order” means the court orders listed on Schedule 2 hereto, which list was provided by the Company in response to our request for a list of all material court orders binding on the Company or its property.

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10 All consents, approvals, authorizations or other orders of, or registrations or filings on the part of the Company with any United States federal or Wisconsin State governmental or regulatory authority required for the issuance of the Shares have been made or obtained, or will be effective, except for (1) such approvals of the Nasdaq Global Select Market (the “Exchange”) as have been obtained, subject to official notice of issuance, in connection with the listing of the Shares on the Exchange, and (2) such as may be required (and as to which we express no opinion) under applicable state securities laws and regulations or from FINRA in connection with the offer or sale of the Shares.

11 The statements in the Basic Prospectus [Add the following if opinion is delivered in connection with a Terms Agreement— and the General Disclosure Package (as defined below)] under the headings “Description of Common Stock” and “Plan of Distribution,” in the Prospectus Supplement under the heading “Plan of Distribution” and in the Registration Statement in Item 15, in each case insofar as the statements purport to describe the provisions of documents and laws referred to therein, are accurate in all material respects.

12 The Company is not, and immediately upon receipt of payment for the Shares will not be, an “investment company” required to be registered under the Investment Company Act.

13 Without independent verification of the factual accuracy, completeness or fairness of any statements made in the Registration Statement and the Prospectus, each of the Registration Statement and Prospectus (except for the financial statements and financial schedules and other financial information included therein, as to which we express no opinion), appears on its face to be appropriately responsive in all material respects to the requirements of the Act and the applicable rules and regulations of the Commission thereunder.

Confirmations

1 We confirm to you that to our knowledge, except as described in the Registration Statement, the Prospectus and any Permitted Free Writing Prospectus [Add the following if opinion is delivered in connection with a Terms Agreement— and the General Disclosure Package (as defined below)], there is not pending or threatened in writing any action, suit or proceeding to which the Company or any of its consolidated subsidiaries is a party, or to which the property of the Company or any of its consolidated subsidiaries is subject, before or brought by any court or governmental agency or body that, according to the Back-Up Certificate, would reasonably be expected to result in a Material Adverse Effect.

2 We have participated in conferences with officers and other representatives of the Company, representatives of the Agents and representatives of the independent auditors of the Company at which the contents of the Registration Statement [Add the following if opinion is delivered in connection with a Terms Agreement—, the General Disclosure Package] and the Prospectus and any amendments or supplements thereto were discussed. Although we assume no responsibility for the factual accuracy, completeness or fairness of any statements (other than as set forth in paragraph 11 above, subject to the assumptions, exclusions and qualifications set forth in this opinion) made in (i) the Registration Statement or any amendment thereto, (ii) [Add the following if opinion is delivered in connection with a Terms Agreement— the General Disclosure Package or any amendment or supplement thereto, (iii)] the Prospectus or any

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amendment or supplement thereto, or (iii) the documents incorporated by reference in the Prospectus or any further amendment or supplement thereto, nothing has come to our attention that causes us to believe that:

(a) the Registration Statement, at the time the Registration Statement became effective (except for the financial statements and financial schedules and other financial or accounting information included therein or omitted therefrom and for management’s report on the Company’s internal control over financial reporting and the auditor’s report on the effectiveness of the Company’s internal control over financial reporting included therein and the Statement of Eligibility of the Trustee on Form T-1 under the Trust Indenture Act, as to which we make no statement), contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading, or

(b) [Add the following if opinion is being delivered in connection with a Terms Agreement— ] the Prospectus, the information set forth under the caption “Time of sale information” in the Schedule to the Subject Agreement and the information set forth in any Permitted Free Writing Prospectuses, considered together (collectively, the “General Disclosure Package”), as of [Insert time of sale appearing in the Schedule to the Terms Agreement] (except for the financial statements and financial schedules and other financial or accounting information included therein or omitted therefrom and for management’s report on the Company’s internal control over financial reporting and the auditor’s report on the effectiveness of the Company’s internal control over financial reporting included therein, as to which we make no statement), contained any untrue statement of a material fact or omitted to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, or

(c) the Prospectus or any amendment or supplement thereto, as of its date [Add the following if opinion is delivered in connection with a Terms Agreement— , as of the date of the applicable Terms Agreement] or as amended and supplemented, if applicable, as of the date hereof (except for the financial statements and financial schedules and other financial or accounting information included therein or omitted therefrom and for management’s report on the Company’s internal control over financial reporting and the auditor’s report on the effectiveness of the Company’s internal control over financial reporting included therein, as to which we make no statement), contained or contains any untrue statement of a material fact or omitted or omits to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading.

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SCHEDULE 1

PERMITTED FREE WRITING PROSPECTUSES

C-5

SCHEDULE 2

MATERIAL COURT ORDERS

C-6