Separation Agreement and General Release entered into by and between Marcellous P. Frye, Jr., Vice President Economic Development and Strategy and Washington Gas Light Company, dated May 30, 2019

This Separation Agreement and General Release (this “Agreement”) is entered into by and between Marcellous P. Frye, Jr. (“Executive”) and Washington Gas Light Company, a corporation duly organized and existing under the laws of the District of Columbia and the Commonwealth of Virginia (the “Company”).

WHEREAS, Executive currently serves as the Vice President of Economic Development and Strategy of the Company;

WHEREAS, the Company currently maintains the WGL Holdings, Inc. and Washington Gas Light Company Change in Control Severance Plan for Certain Executives (as amended, the “CIC Severance Plan”), and Executive participates in the CIC Severance Plan;

WHEREAS, WGL Holdings, Inc., a Virginia corporation and parent of the Company (“Holdings”), maintains the WGL Holdings, Inc. 2016 Omnibus Incentive Compensation Plan (the “Omnibus Plan”), pursuant to which Executive has been granted certain long-term incentive awards, including grants of equity compensation awards and cash-settled performance unit awards (“LTI Awards”);

WHEREAS, on July 6, 2018, Holdings consummated the transactions contemplated by that certain Agreement and Plan of Merger, dated as of January 25, 2017 (the “Merger Agreement”), by and among AltaGas Ltd., a Canadian corporation (“Parent”), Wrangler Inc., a Virginia corporation, and Holdings;

WHEREAS, on or about August 1, 2018, Executive and Company entered into a retention agreement which provided for a retention bonus to be paid to Executive under certain circumstances (the “Retention Bonus Letter Agreement”);

WHEREAS, Executive’s employment with the Company will end effective as of May 10, 2019 (the “Separation Date”);

WHEREAS, the parties desire for Executive to receive (i) the benefits Executive is eligible to receive upon a Good Reason Resignation (as defined in the CIC Severance Plan) under the CIC Severance Plan, which benefits are conditioned upon Executive’s timely execution (and non-revocation) of this Agreement and Executive’s compliance with the terms of this Agreement, and (ii) accelerated vesting of Executive’s Post-Signing LTI Awards (as defined below) upon a Good Reason Resignation as provided in the Company Disclosure Schedules to the Merger Agreement (the “Disclosure Schedules”);

WHEREAS, this Agreement is intended to qualify as the “Separation of Employment Agreement and General Release” referenced in Section 2.23 of the CIC Severance Plan; and

WHEREAS, the parties wish to resolve any and all claims that Executive has or may have against the Company or any of the other Company Parties (as defined below), including any claims that Executive may have arising out of Executive’s employment or the end of such employment.

NOW, THEREFORE, in consideration of the promises set forth herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged by the parties, the parties agree as follows:

1.Separation from Employment. Executive’s employment with the Company will end effective as of the Separation Date. The parties hereby acknowledge and agree that such termination is a Good Reason Resignation for purposes of the CIC Severance Plan and the Post-Signing LTI Awards. As of the Separation Date, Executive will not have any further employment relationship with the Company or any other Company Party. The end of Executive’s employment with the Company on the Separation Date shall constitute, as applicable, an automatic resignation of Executive: (a) as an officer of the Company, Holdings, and their direct and indirect subsidiaries (collectively, the “Company Group”); and (b) from the board of directors or board of managers (or similar governing body) of any member of the Company Group and from the board of directors or board of managers (or similar governing body) of any corporation, limited liability entity, unlimited liability entity or other entity in which any member of the Company Group holds an equity interest and with respect to which board of directors or board of managers (or similar governing body) Executive serves as such Company Group member’s designee or other representative.

2.    Separation Benefits and Additional Benefits.

(a)    Provided that Executive (x) executes this Agreement on or after the Separation Date and returns it to Luanne S. Gutermuth, EVP and Chief Administrative Officer, at 6801 Industrial Road, Springfield, VA 22151, no later than May 28, 2019; (y) does not exercise his revocation right described in Section 6 of this Agreement; and (z) abides by each of his commitments set forth herein and in the CIC Severance Plan, then:

if applicable, Executive’s spouse and eligible dependents (as the same may be changed from time to time for employees of the Company generally), and as if Executive had remained continuously employed by the Company during the 18-month period immediately following the Separation Date (the “COBRA Continuation Coverage Period”). The Company shall be responsible for the payment of the employee portion of the required medical and dental contributions with respect to such coverage during the COBRA Continuation Coverage Period. Each of the Company's payments pursuant to the foregoing sentence shall be increased by an additional amount equal to the Federal, state and local income tax and FICA applicable to such payment, determined by applying the highest marginal Federal, state and local tax rates in effect at the payment date, with the intention that the Company will pay the full cost of the continued benefit coverage, including any applicable taxes. The Company reserves the right to determine the amount of any increased payment under this paragraph in its full discretion;

The payments and benefits set forth in this Section 2(a) are referred to herein collectively as the “Separation Benefits”.

(b)    The Company acknowledges that Executive is entitled to the following benefits without regard to Executive’s execution of this Agreement:

The payments and benefits set forth in this Section 2(b) are referred to herein collectively as the “Additional Benefits”.

3.    Satisfaction of All Leaves and Payment Amounts; Prior Rights and Obligations. In entering into this Agreement, Executive expressly acknowledges and agrees that, except as otherwise set forth in this Agreement, Executive has received all leaves (paid and unpaid) to which Executive has been entitled during Executive’s employment or engagement with the Company and any other Company Party, and Executive has received all wages, bonuses and other compensation, been provided all benefits and been afforded all rights and been paid all sums that Executive is owed or has been owed by the Company or any other Company Party, including all payments arising out of all incentive plans and any other bonus arrangements. For the avoidance of doubt, Executive shall not be entitled to receive (a) any payments or benefits pursuant to the Washington Gas Light Company Severance Pay Plan, (b) any payments under the Retention Bonus Letter Agreement, or (c) any payments under the LTI Awards granted after July 6, 2018. Notwithstanding the foregoing, Executive remains entitled to receive (to the extent still unpaid as of the date that Executive signs this Agreement) the Separation Benefits and the Additional Benefits in accordance with this Agreement, and Executive remains entitled to any benefits that may become due to him pursuant to Sections 4.5 and 4.6 of the CIC Severance Plan. Executive acknowledges and agrees that Executive had no right to the Separation Benefits (or any portion thereof) but for Executive’s entry into this Agreement and satisfaction of the terms herein.

4.    General Release of Claims.

(a)    As a condition of Executive’s receipt of the Separation Benefits (and any portion thereof), Executive hereby acquits, releases and forever discharges the Company, Holdings, Parent, their respective affiliates and each of the foregoing entities’ respective past and present owners, shareholders, partners, officers, managers, members, employees, directors, attorneys, affiliates, subsidiaries, parent companies, successors and assigns, heirs, executors, and administrators (hereinafter referred to collectively as the “Company Parties”) of and from any and all actions and causes of action, suits, debts, liabilities, claims, damages, and demands whatsoever in law or in equity, which Executive ever had, now has, or which Executive or Executive’s heirs, executors or administrators may have, by reason of anything whatsoever, arising from or relating in any way to Executive’s employment or the termination of Executive’s employment, or any other act or omission related to any matter occurring or existing on or prior to the time that Executive signs this Agreement, whether known or unknown, including any claims which have been asserted, could have been asserted or could be asserted now or in the future.

(b)    Executive acknowledges and agrees that the release of claims described in Section 4(a) includes any claims under any federal, state or local laws prohibiting employment discrimination (including (each as may have been amended) Title VII of the Civil Rights Act of 1964, the Age Discrimination in Employment Act of 1967 (“ADEA”), the Americans With Disabilities Act, the Virginia Human Rights Act, the Virginians with Disabilities Act, and the D.C. Human Rights Act); the Employee Retirement Income Security Act of 1974, as amended (“ERISA”); any common law, contract, or tort claims now or hereafter recognized (including any claim for breach of contract (including any claim arising out of or relating to the CIC Severance Plan, except with respect to the payment of the Separation Benefits hereunder), wrongful discharge, emotional distress, wrongful termination, fraud or misrepresentation, or defamation); any public policy; and all claims for attorney’s fees and costs.

(c)    Executive acknowledges and agrees that in no event shall the release of claims described in Section 4(a) include any claim that first arises after Executive signs this Agreement, or any claim to vested benefits under an employee benefit plan that is subject to ERISA (including any rights to benefits under health plans and vested benefits under retirement plans or pension plans). Further, nothing in this Agreement prevents Executive from filing any non-legally waivable claim (including a challenge to the validity of the release of claims under the Age Discrimination in Employment Act of 1967, as amended), and nothing in this Agreement shall be construed to prohibit Executive from engaging in any activity protected by the Sarbanes-Oxley Act, 18 U.S.C. § 1514A, or subject to Section 4(d) below, from filing any charge or claim with the federal Equal Employment Opportunity Commission (the “EEOC”) or any other governmental agency (including without limitation the Virginia Human Rights Commission) or participating in any investigation or proceeding conducted by the EEOC or other governmental agency or cooperating with such agency; however, Executive acknowledges and agrees that Executive is waiving any and all rights to recover any monetary or personal relief as a result of such EEOC or other governmental

agency proceeding or subsequent legal actions. Nothing herein waives Executive’s right to receive an award for information provided to a governmental agency.

(d)    Upon the receipt of reasonable notice from the Company (including outside counsel), Executive agrees that, following the Separation Date, Executive will respond and provide information with regard to matters about which Executive has knowledge as a result of Executive’s employment with the Company, and Executive will provide reasonable assistance to the Company and the other Company Parties in defense of any claims that may be made against the Company or the other Company Parties and assist the Company and the other Company Parties in the prosecution of any claims that may be made by the Company or the other Company Parties, to the extent that such claims may relate to the period of Executive’s employment with the Company (collectively, the “Claims”). Executive agrees to promptly inform the Company if Executive becomes aware of any lawsuits involving Claims that may be filed or threatened against the Company or the other Company Parties. Executive also agrees to promptly inform the Company (to the extent that Executive is legally permitted to do so) if Executive is asked to assist in any investigation of the Company or and the other Company Parties (or their actions) or another party attempts to obtain information or documents from Executive (other than in connection with any litigation or other proceeding in which Executive is a party-in-opposition) with respect to matters Executive believes in good faith to relate to any investigation of the Company or the other Company Parties, in each case, regardless of whether a lawsuit or other proceeding has then been filed against the Company or the other Company Parties with respect to such investigation, and shall not do so unless legally required. During the pendency of any litigation or other proceeding involving Claims, Executive shall not communicate with anyone (other than Executive’s attorneys and tax and/or financial advisors) with respect to the facts or subject matter of any pending or potential litigation or regulatory or administrative proceeding involving the Company or any of the other Company Parties without giving prior written notice to the Company or the Company’s counsel. Executive acknowledges and agrees that if any person, organization or other entity files, charges, claims, sues or causes or permits to be filed, charged or claimed, any civil action, suit or legal proceeding for personal relief (including any action for damages, injunctive, declaratory, monetary or other relief) against the Company or any of the other Company Parties involving any claim that Executive has released herein, Executive will not accept any personal relief in any such action. Upon presentation of appropriate documentation, the Company shall pay or reimburse Executive for all reasonable out-of-pocket travel, duplicating or telephonic expenses incurred by Executive in complying with this Section 4(d).

5.    Executive’s ADEA Waiver Acknowledgements. Executive expressly acknowledges and agrees that, among the matters waived in this Agreement are any and all rights or claims arising under the ADEA. Pursuant to the Older Workers Benefit Protection Act (“OWBPA”), which contains special provisions and requirements affecting the release of ADEA claims, Executive also expressly acknowledges and agrees that:

(a)    In return for this Agreement, he will receive consideration, i.e., something of value, beyond that which he was already entitled to receive before entering into this Agreement;

(b)    Executive has had sufficient time (and at least 21 days from the receipt of this Agreement) to consider this Agreement before the execution and delivery to the Company;

(c)    If Executive knowingly and voluntarily chooses to do so, he may accept the terms of the Agreement before the twenty-one (21) day consideration period has expired;

(d)    Executive has been advised, and hereby is advised in writing, to consult an attorney regarding this Agreement before signing;

(e)    Executive acknowledges and agrees that Executive is competent to enter into this Agreement and knowingly and voluntarily does so, understanding it as fully resolving any differences and disputes between Executive and the Company and the other Company Parties;

(f)    Executive has carefully read this Agreement; and

(g)    Any changes made to this Agreement in accordance with the provisions set forth herein, whether material or immaterial, will not restart the running of the twenty-one (21) day period;

6.    Revocation Right. Notwithstanding the initial effectiveness of this Agreement, Executive has the right to revoke the delivery (and therefore the effectiveness) of this Agreement within the seven-day period beginning on the day Executive signs this Agreement (such seven-day period being referred to herein as the “Release Revocation Period”). To be effective, such revocation must be in writing signed by Executive and must be received by the Company, care of: General Counsel, Washington Gas Light Company, 1000 Maine Avenue, SW, Suite 700, Washington, D.C. 20024, on or before the last day of the Release Revocation Period. If an effective revocation is delivered in the foregoing manner and timeframe, then the Separation Benefits shall not be paid or provided to Executive pursuant to Section 2(a) of this Agreement, the release of claims set forth in Section 4 shall be of no force or effect and the remainder of this Agreement shall be in full force and effect. This Agreement shall not become effective until the eighth (8th) day following its execution by Executive.

7.    Affirmation of Restrictive Covenants; Permitted Disclosures. Executive acknowledges and agrees that he is subject to the restrictions set forth in Article 6 of the CIC Severance Plan, including the Company’s Policy of Post-Employment Restrictions attached as Exhibit 2 thereto (the “Post-Employment Restrictions”), which include certain confidentiality, non-solicitation and non-competition restrictive covenants. Provided that Executive satisfies the requirements to receive the Separation Benefits set forth in Section 2(a), then, effective as of the Separation Date, Section III.B.2. of the Company’s Policy of Post-Employment Restrictions

attached as Exhibit 2 to the CIC Severance Plan as it applies to Executive shall be amended and restated so that it reads, in its entirety, as follows:

2.    Solicitation of Customers. The solicitation of any customer or prospective customer of WGL Holdings, Inc. and/or Washington Gas Light Company with whom or which the executive had material contact regarding actual or prospective business with WGL Holdings, Inc. and/or Washington Gas Light Company during the preceding year, or for whom or which the executive had direct or indirect responsibility, or about whom or which the executive obtained Confidential Information, in each case as an employee or representative of WGL Holdings, Inc. and/or Washington Gas Light Company, which solicitation is with the intent of soliciting business competitive to that of WGL Holdings, Inc. and/or Washington Gas Light Company or diverting business from WGL Holdings, Inc. and/or Washington Gas Light Company.

Executive expressly acknowledges and agrees that the Post-Employment Restrictions (as amended by this Agreement) are enforceable in all respects and promises to abide by their terms. Notwithstanding the foregoing, nothing in this Agreement or the Post-Employment Restrictions shall prohibit or restrict Executive from lawfully (a) initiating communications directly with, cooperating with, providing information to, causing information to be provided to, or otherwise assisting in an investigation by, any governmental authority regarding a possible violation of any law; (b) responding to any inquiry or legal process directed to Executive from any such governmental authority; (c) testifying, participating or otherwise assisting in an action or proceeding by any such governmental authority relating to a possible violation of law; or (d) making any other disclosures that are protected under the whistleblower provisions of any applicable law. Additionally, pursuant to the federal Defend Trade Secrets Act of 2016, Executive shall not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that: (i) is made (A) in confidence to a federal, state or local government official, either directly or indirectly, or to an attorney and (B) solely for the purpose of reporting or investigating a suspected violation of law; (ii) is made to Executive’s attorney in relation to a lawsuit for retaliation against Executive for reporting a suspected violation of law; or (iii) is made in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal. Nothing in this Agreement requires Executive to obtain prior authorization from the Company before engaging in any conduct described in this paragraph, or to notify the Company that Executive has engaged in any such conduct.

8.    Entire Agreement. This Agreement constitutes the entire agreement between the parties with respect to the matters herein provided. No modifications or waiver of any provision hereof shall be effective unless in writing and signed by each party.

9.    Governing Law and Jurisdiction. The validity, interpretation, construction, performance and enforcement of this Agreement shall be governed by the laws of the Commonwealth of Virginia to the extent not superseded by Federal law. With respect to any claim or dispute related to or arising under this Agreement, the parties hereby consent to the exclusive jurisdiction, forum and venue of the state and federal courts (as applicable) located in the Commonwealth of Virginia; provided, however, that Executive may not bring any action with respect to any claim or dispute under this Agreement in any court without first exhausting the claims procedures described in Article

10 of the CIC Severance Plan. Executive irrevocably waives Executive's right to object to or challenge the above selected forum on the basis of inconvenience or unfairness.

10.    Assignment. The Company has the right to assign this Agreement, but Executive does not. This Agreement inures to the benefit of the successors and assigns of the Company, who are intended third party beneficiaries of this Agreement, and any such successors and assigns shall assume the obligations under this Agreement and expressly agree to perform the obligations under this Agreement, consistent with Section 11.3 of the CIC Severance Plan.

11.    Headings; Interpretation. Titles and headings to Sections hereof are for the purpose of reference only and shall in no way limit, define or otherwise affect the provisions hereof. Unless the context requires otherwise, all references herein to an agreement, instrument or other document shall be deemed to refer to such agreement, instrument or other document as amended, supplemented, modified and restated from time to time to the extent permitted by the provisions thereof. The word “or” as used herein is not exclusive and is deemed to have the meaning “and/or.” The words “herein”, “hereof”, “hereunder” and other compounds of the word “here” shall refer to the entire Agreement, including exhibits, and not to any particular provision hereof. The use herein of the word “including” following any general statement, term or matter shall not be construed to limit such statement, term or matter to the specific items or matters set forth immediately following such word or to similar items or matters, whether or not non-limiting language (such as “without limitation”, “but not limited to”, or words of similar import) is used with reference thereto, but rather shall be deemed to refer to all other items or matters that could reasonably fall within the broadest possible scope of such general statement, term or matter. Neither this Agreement nor any uncertainty or ambiguity herein shall be construed or resolved against any party hereto, whether under any rule of construction or otherwise. On the contrary, this Agreement has been reviewed by each of the parties hereto and shall be construed and interpreted according to the ordinary meaning of the words used so as to fairly accomplish the purposes and intentions of the parties.

12.    Third Party Beneficiaries. Each Company Party that is not a signatory hereto shall be a third-party beneficiary of Executive’s covenants, warranties, representations, and release of claims set forth in this Agreement and entitled to enforce such covenants, warranties, representations, and release of claims as if it, he or she was a party hereto.

13.    No Waiver. No failure by any party at any time to give notice of any breach by the other party of, or to require compliance with, any condition or provision of this Agreement shall be deemed a waiver of similar or dissimilar provisions or conditions at the same or at any prior or subsequent time.

14.    Severability and Modification. To the extent permitted by applicable law, the parties agree that any term or provision of this Agreement (or part thereof) that renders such term or provision (or part thereof) or any other term or provision (or part thereof) of this Agreement invalid or unenforceable in any respect shall be severable and shall be modified or severed to the extent necessary to avoid rendering such term or provision (or part thereof) invalid or unenforceable, and such severance or modification shall be accomplished in the manner that most nearly preserves the benefit of the parties’ bargain hereunder.

15.    Withholding of Taxes and Other Deductions. The Company may withhold from any payments made pursuant to this Agreement all federal, state, local, and other taxes and withholdings as may be required pursuant to any law or governmental regulation or ruling.

16.    Notices. The notice provisions set forth in Section 11.2 of the CIC Severance Plan shall apply to this Agreement as fully as though set forth herein.

17.    Counterparts. This Agreement may be executed in one or more counterparts (including electronic mail in portable document format (.pdf), facsimile or by any other electronic means intended to preserve the original graphic and pictorial appearance of the document), each of which shall be deemed to be an original, but all of which together will constitute one and the same agreement. Delivery of a copy of this Agreement bearing an original signature by facsimile transmission or by electronic mail shall have the same effect as physical delivery of the paper document bearing the original signature.

18.    Section 409A. This Agreement and the payments provided hereunder are intended to be compliant with, or exempt from, the requirements of Section 409A of the Code and the Treasury regulations and interpretive guidance issued thereunder, and this Agreement shall be construed and administered in accordance with such intent. Section 11.14 of the CIC Severance Plan is incorporated herein by reference in its entirety and shall apply to this Agreement as fully as though set forth herein.

19.    Mutual Non-Disparagement. Executive agrees that he shall not disparage or cause or encourage anyone else to disparage any of the Company Parties or any Company employees. The Company shall instruct its executive officers and directors not to disparage Executive.

IN WITNESS WHEREOF, the parties have executed this Agreement with the intent to be legally bound.