Master Confirmation between JPMorgan Chase Bank, National Association and Domtar Corporation, dated March 1, 2021

Exhibit 10.1

JPMorgan Chase Bank, National Association

New York Branch

383 Madison Avenue

New York, NY, 10179

March 1, 2021

234 Kingsley Park Drive

Fort Mill, SC 29715

Re:     Master Confirmation—Uncollared Accelerated Share Repurchase

This master confirmation (this “Master Confirmation”), dated as of March 1, 2021, is intended to set forth certain terms and provisions of certain Transactions (each, a “Transaction”) entered into from time to time between JPMorgan Chase Bank, National Association (“JPMorgan”) and Domtar Corporation, a Delaware corporation (“Counterparty”). This Master Confirmation, taken alone, is neither a commitment by either party to enter into any Transaction nor evidence of a Transaction. The additional terms of any particular Transaction shall be set forth in a Supplemental Confirmation in the form of Schedule A hereto (a “Supplemental Confirmation”), which shall reference this Master Confirmation and supplement, form a part of, and be subject to this Master Confirmation. This Master Confirmation and each Supplemental Confirmation together shall constitute a “Confirmation” as referred to in the Agreement specified below.

The definitions and provisions contained in the 2002 ISDA Equity Derivatives Definitions (the “Equity Definitions”), as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Master Confirmation. This Master Confirmation and each Supplemental Confirmation evidence a complete binding agreement between Counterparty and JPMorgan as to the subject matter and terms of each Transaction to which this Master Confirmation and such Supplemental Confirmation relate and shall supersede all prior or contemporaneous written or oral communications with respect thereto.

This Master Confirmation and each Supplemental Confirmation supplement, form a part of, and are subject to an agreement in the form of the ISDA 2002 Master Agreement (the “Agreement”) as if JPMorgan and Counterparty had executed the Agreement on the date of this Master Confirmation (but without any Schedule except for (i) the election of New York law as the governing law (without reference to its choice of law provisions) and (ii) the election that subparagraph (ii) of Section 2(c) will not apply to the Transactions).

The Transactions shall be the sole Transactions under the Agreement. If there exists any ISDA Master Agreement between JPMorgan and Counterparty or any confirmation or other agreement between JPMorgan and Counterparty pursuant to which an ISDA Master Agreement is deemed to exist between JPMorgan and Counterparty, then notwithstanding anything to the contrary in such ISDA Master Agreement, such confirmation or agreement or any other agreement to which JPMorgan and Counterparty are parties, the Transactions shall not be considered Transactions under, or otherwise governed by, such existing or deemed ISDA Master Agreement, and the occurrence of any Event of Default or Termination Event under the Agreement with respect to either party or any Transaction shall not, by itself, give rise to any right or obligation under any such other agreement or deemed agreement. Notwithstanding anything to the contrary in any other agreement between the parties or their Affiliates, the Transactions shall not be “Specified Transactions” (or similarly treated) under any other agreement between the parties or their Affiliates.

All provisions contained or incorporated by reference in the Agreement shall govern this Master Confirmation and each Supplemental Confirmation except as expressly modified herein or in the related Supplemental Confirmation.

If, in relation to any Transaction to which this Master Confirmation and a Supplemental Confirmation relate, there is any inconsistency between the Agreement, this Master Confirmation, such Supplemental

Confirmation and the Equity Definitions, the following will prevail for purposes of such Transaction in the order of precedence indicated: (i) such Supplemental Confirmation; (ii) this Master Confirmation; (iii) the Equity Definitions; and (iv) the Agreement.

1.    Each Transaction constitutes a Share Forward Transaction for the purposes of the Equity Definitions. Set forth below are the terms and conditions that, together with the terms and conditions set forth in the Supplemental Confirmation relating to any Transaction, shall govern such Transaction.

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[Intentionally omitted]

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JPMorgan Chase Bank, National Association

New York Branch

383 Madison Avenue

New York, NY, 10179

Domtar Corporation

234 Kingsley Park Drive

Fort Mill, SC 29715

JPMorgan Chase Bank, National Association

EDG Marketing Support

(i)    It is an “eligible contract participant” (as such term is defined in the Commodity Exchange Act, as amended).

(ii)    The offer and sale of each Transaction to it is intended to be exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), by virtue of Section 4(a)(2) thereof. Accordingly, each party represents and warrants to the other that (A) it has the financial ability to bear the economic risk of its investment in each Transaction and is able to bear a total loss of its investment, (B) it is an “accredited investor” as that term is defined under Regulation D under the Securities Act and (C) the disposition of each Transaction is restricted under this Master Confirmation, the Securities Act and state securities laws.

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(i)    As of the Trade Date for each Transaction hereunder, (A) such Transaction is being entered into pursuant to a publicly disclosed Share buy-back program and its Board of Directors has approved the use of derivatives to effect the Share buy-back program and (B) there is no internal policy of Counterparty, whether written or oral, that would prohibit Counterparty from entering into any aspect of such Transaction, including, without limitation, the purchases of Shares to be made pursuant to such Transaction.

(ii)    As of the Trade Date for each Transaction hereunder, the purchase or writing of such Transaction and the transactions contemplated hereby will not violate Rule 13e-1 or Rule 13e-4 under the Exchange Act.

(iii)    As of the Trade Date for each Transaction hereunder, it is not entering into such Transaction, and as of the date of any election with respect to any Transaction hereunder, it is not making such election, in each case (A) on the basis of, and is not aware of, any material non-public information regarding Counterparty or the Shares, (B) in anticipation of, in connection with, or to facilitate, a distribution of its securities, a self tender offer or a third-party tender offer in violation of the Exchange Act or (C) to create actual or apparent trading activity in the Shares (or any security convertible into or exchangeable for the Shares) or to raise or depress or otherwise manipulate the price of the Shares (or any security convertible into or exchangeable for the Shares).

(iv)    As of the Trade Date for each Transaction hereunder, and as of the date of any election with respect to any Transaction hereunder, Counterparty is in compliance with its reporting obligations under the Exchange Act and its most recent Annual Report on Form 10-K, together with all reports subsequently filed by it pursuant to the Exchange Act, taken together and as amended and supplemented to the date of this representation, do not, as of their respective filing dates, contain any untrue statement of a material fact or omit to state any 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.

(v)    Counterparty shall report each Transaction to the extent required under the Exchange Act and the rules and regulations thereunder.

(vi)    (A) The Shares are not, as of the Calculation Period Start Date, and (B) Counterparty will not, at any time during any Regulation M Period (as defined below) for any Transaction, cause the Shares to be, subject to a “restricted period” (as defined in Regulation M promulgated under the Exchange Act) unless, in the case of clause (B), Counterparty has provided written notice to JPMorgan of such restricted period not later than the Scheduled Trading Day immediately preceding the first day of such “restricted period”; Counterparty acknowledges that any such notice may cause a Disrupted Day to occur pursuant to Section 7 hereof; accordingly, Counterparty acknowledges that its delivery of such notice must comply with the standards set forth in Section 8 hereof. Counterparty is not currently contemplating any “distribution” (as defined in Regulation M promulgated under the Exchange Act) of Shares, or any security for which Shares are a “reference security” (as defined in Regulation M promulgated under the Exchange Act). “Regulation M Period” means, for any Transaction, (A) the Relevant Period (as defined below) for such Transaction, (B) the Settlement Valuation Period, if any, for such Transaction and (C) the Seller Termination Purchase Period (as defined below), if any, for such Transaction. “Relevant Period” means, for any Transaction, the period commencing on the Calculation Period Start Date for such Transaction and ending on the later of (1) the earlier of (x) the Scheduled Termination Date and (y) the last Additional Relevant Day (as specified in the related Supplemental Confirmation) for such

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Transaction, or such earlier day as elected by JPMorgan and communicated to Counterparty on such day (or, if later, the First Acceleration Date without regard to any acceleration thereof pursuant to “Special Provisions for Acquisition Transaction Announcements” below) and (2) if Section 15 hereof is applicable to such Transaction, the date on which all deliveries owed pursuant to such Section 15 have been made.

(vii)    As of the Trade Date, the Prepayment Date, the Initial Share Delivery Date, the Settlement Date, any Cash Settlement Payment Date and any Settlement Method Election Date for each Transaction, Counterparty is not “insolvent” (as such term is defined under Section 101(32) of the U.S. Bankruptcy Code (Title 11 of the United States Code) (the “Bankruptcy Code”)) and Counterparty would be able to purchase a number of Shares with a value equal to the Prepayment Amount in compliance with the laws of the jurisdiction of Counterparty’s incorporation.

(viii)    Counterparty is not, and after giving effect to each Transaction will not be, required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.

(ix)    Counterparty will not enter into any obligation that would contractually limit it from effecting Cash Settlement or Net Share Settlement under any Transaction.

(x)    Counterparty has not entered, and will not enter, into any repurchase transaction with respect to the Shares (or any security convertible into or exchangeable for the Shares) (including, without limitation, any agreements similar to the Transactions described herein) where any initial hedge period, calculation period, relevant period, settlement valuation period or seller termination purchase period (each however defined) in such other transaction will overlap at any time (including, without limitation, as a result of extensions in such initial hedge period, calculation period, relevant period, settlement valuation period or seller termination purchase period as provided in the relevant agreements) with any Relevant Period, any Settlement Valuation Period (if applicable) or any Seller Termination Purchase Period (if applicable) under this Master Confirmation. In the event that the initial hedge period, relevant period, calculation period or settlement valuation period in any other transaction overlaps with any Relevant Period, any Settlement Valuation Period (if applicable) or any Seller Termination Purchase Period (if applicable) under this Master Confirmation as a result of any postponement of the Scheduled Termination Date or extension of the Settlement Valuation Period pursuant to “Valuation Disruption” above or any analogous provision in such other transaction, Counterparty shall promptly amend such other transaction to avoid any such overlap.

(xi)    Counterparty (A) is capable of evaluating investment risks independently, both in general and with regard to all transactions and investment strategies involving a security or securities; (B) will exercise independent judgment in evaluating the recommendations of any broker-dealer or its associated persons, unless it has otherwise notified the broker-dealer in writing; and (C) has total assets of at least USD 50,000,000 as of the date hereof.

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“Merger Transaction” means any merger, acquisition or similar transaction involving a recapitalization as contemplated by Rule 10b-18(a)(13)(iv) under the Exchange Act.

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(i)     each Transaction to be a “securities contract” as defined in Section 741(7) of the Bankruptcy Code and a “forward contract” as defined in Section 101(25) of the Bankruptcy Code, and the parties hereto to be entitled to the protections afforded by, among other Sections, Sections 362(b)(6), 362(b)(27), 362(o), 546(e), 546(j), 555, 556, 560 and 561 of the Bankruptcy Code;

(ii)     the Agreement to be a “master netting agreement” as defined in Section 101(38A) of the Bankruptcy Code;

(iii)     a party’s right to liquidate, terminate or accelerate any Transaction, net out or offset termination values or payment amounts, and to exercise any other remedies upon the occurrence of any Event of Default or Termination Event under the Agreement with respect to the other party or any Extraordinary Event that results in the termination or cancellation of any Transaction to constitute a “contractual right” (as defined in the Bankruptcy Code); and

(iv)     all payments for, under or in connection with each Transaction, all payments for the Shares (including, for the avoidance of doubt, payment of the Prepayment Amount) and the transfer of such Shares to constitute “settlement payments” and “transfers” (as defined in the Bankruptcy Code).

(i)    during the term of any Transaction, JPMorgan and its Affiliates may buy or sell Shares or other securities or buy or sell options or futures contracts or enter into swaps or other derivative securities in order to establish, adjust or unwind its hedge position with respect to such Transaction;

(ii)    JPMorgan and its Affiliates may also be active in the market for the Shares and Share-linked transactions other than in connection with hedging activities in relation to any Transaction;

(iii)    JPMorgan shall make its own determination as to whether, when or in what manner any hedging or market activities in Counterparty’s securities shall be conducted and shall do so in a manner that it deems appropriate to hedge its price and market risk with respect to the Forward Price and the VWAP Price;

(iv)    any market activities of JPMorgan and its Affiliates with respect to the Shares may affect the market price and volatility of the Shares, as well as the Forward Price, the VWAP Price and the Settlement Price, each in a manner that may be adverse to Counterparty; and

(v)    each Transaction is a derivatives transaction in which it has granted JPMorgan an option; JPMorgan may purchase shares for its own account at an average price that may be greater than, or less than, the price paid by Counterparty under the terms of the related Transaction.

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(a)    Sections 2(d)(i)(4)(A) and 2(d)(ii) of the Agreement shall be deemed also to refer to agreements contained in the proviso to the provisions set forth under the caption “Assignment and Transfer” below.

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(b)    For purposes of Section 3(f) of the Agreement, JPMorgan and Counterparty each represent to the other that they are U.S. persons for U.S. federal income tax purposes.

(c)    For the purpose of Section 4(a)(i) of the Agreement, JPMorgan and Counterparty (or any U.S. assignee of either party, to the extent it is legally able to do so) shall each furnish to the other party a properly completed and executed IRS Form W-9 upon the execution of this Agreement and thereafter, promptly upon (i) reasonable demand by the other party or (ii) learning that any form previously provided has become obsolete or incorrect.

(d)    Withholding Tax imposed on payments to non-US counterparties under the United States Foreign Account Tax Compliance Act. “Tax” and “Indemnifiable Tax”, each as defined in Section 14 of the Agreement, shall not include any U.S. federal withholding tax imposed or collected pursuant to Sections 1471 through 1474 of the U.S. Internal Revenue Code of 1986, as amended (the “Code”), any current or future regulations or official interpretations thereof, any agreement entered into pursuant to Section 1471(b) of the Code, or any fiscal or regulatory legislation, rules or practices adopted pursuant to any intergovernmental agreement entered into in connection with the implementation of such Sections of the Code (a “FATCA Withholding Tax”). For the avoidance of doubt, a FATCA Withholding Tax is a Tax the deduction or withholding of which is required by applicable law for the purposes of Section 2(d) of the Agreement.

(e)     HIRE Act. To the extent that either party to the Agreement with respect to this Transaction is not an adhering party to the ISDA 2015 Section 871(m) Protocol published by the International Swaps and Derivatives Association, Inc. on November 2, 2015 and available at www.isda.org, as may be amended, supplemented, replaced or superseded from time to time (the “871(m) Protocol”), the parties agree that the provisions and amendments contained in the Attachment to the 871(m) Protocol are incorporated into and apply to the Agreement with respect to this Transaction as if set forth in full herein. The parties further agree that, solely for purposes of applying such provisions and amendments to the Agreement with respect to this Transaction, references to “each Covered Master Agreement” in the 871(m) Protocol will be deemed to be references to the Agreement with respect to this Transaction, and references to the “Implementation Date” in the 871(m) Protocol will be deemed to be references to the Trade Date of this Transaction.

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(i)    deleting (1) subsection (A) in its entirety, (2) the phrase “or (B)” following subsection (A) and (3) the phrase “in each case” in subsection (B); and

(ii)    replacing the phrase “neither the Non-Hedging Party nor the Lending Party lends Shares” with the phrase “such Lending Party does not lend Shares” in the penultimate sentence.

(i)    adding the word “or” immediately before subsection “(B)” and deleting the comma at the end of subsection (A); and

(ii)    (1) deleting subsection (C) in its entirety, (2) deleting the word “or” immediately preceding subsection (C), (3) deleting the penultimate sentence in its entirety and replacing it with the sentence “The Hedging Party will determine the Cancellation Amount payable by one party to the other” and (4) deleting clause (X) in the final sentence.

(i)    adding the word “or” immediately before subsection “(B)” and deleting the comma at the end of subsection (A); and

(ii)    (1) deleting subsection (C) in its entirety, (2) deleting the word “or” immediately preceding subsection (C) and (3) deleting the final sentence in its entirety and replacing it with the sentence “The Hedging Party will determine the Cancellation Amount payable by one party to the other”.

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“QFC Stay Rules” means the regulations codified at 12 C.F.R. 252.2, 252.81–8, 12 C.F.R. 382.1-7 and 12 C.F.R. 47.1-8, which, subject to limited exceptions, require an express recognition of the stay-and-transfer powers of the FDIC under the Federal Deposit Insurance Act and the Orderly Liquidation Authority under Title II of the Dodd Frank Wall Street Reform and Consumer Protection Act and the override of default rights related directly or indirectly to the entry of an affiliate into certain insolvency proceedings and any restrictions on the transfer of any covered affiliate credit enhancements.

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Please confirm that the foregoing correctly sets forth the terms of our agreement by executing this Master Confirmation and returning it to us.

Accepted and confirmed

as of the date first set

forth above:

SCHEDULE A

FORM OF SUPPLEMENTAL CONFIRMATION

JPMorgan Chase Bank, National Association

New York Branch

383 Madison Avenue

New York, NY, 10179

[            ], 20[    ]

234 Kingsley Park Drive

Fort Mill, SC 29715

Re:     Supplemental Confirmation—Uncollared Accelerated Share Repurchase

The purpose of this Supplemental Confirmation is to confirm the terms and conditions of the Transaction entered into between JPMorgan Chase Bank, National Association (“JPMorgan”) and Domtar Corporation, a Delaware corporation (“Counterparty”) on the Trade Date specified below. This Supplemental Confirmation is a binding contract between JPMorgan and Counterparty as of the relevant Trade Date for the Transaction referenced below.

1.    This Supplemental Confirmation supplements, forms part of, and is subject to the Master Confirmation, dated as of March 1, 2021 (the “Master Confirmation”), between JPMorgan and Counterparty, as amended and supplemented from time to time. All provisions contained in the Master Confirmation govern this Supplemental Confirmation except as expressly modified below.

2.    The terms of the Transaction to which this Supplemental Confirmation relates are as follows:

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3.    Counterparty represents and warrants to JPMorgan that neither it nor any “affiliated purchaser” (as defined in Rule 10b-18 under the Exchange Act) has made any purchases of blocks pursuant to the proviso in Rule 10b-18(b)(4) under the Exchange Act during either (i) the four full calendar weeks immediately preceding the Trade Date or (ii) during the calendar week in which the Trade Date occurs, except as set forth in any notice delivered pursuant to Section 6(b)(xv) of the Master Confirmation.

4.    This Supplemental Confirmation may be executed in any number of counterparts, all of which shall constitute one and the same instrument, and any party hereto may execute this Supplemental Confirmation by signing and delivering one or more counterparts.

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Please confirm that the foregoing correctly sets forth the terms of our agreement by executing this Supplemental Confirmation and returning it to us.

Accepted and confirmed

as of the Trade Date:

A-3

SCHEDULE B

FORM OF CERTIFICATE OF RULE 10B-18 PURCHASES

[Letterhead of Counterparty]

JPMorgan Chase Bank, National Association

New York Branch

383 Madison Avenue

New York, NY, 10179

Re:     Uncollared Accelerated Share Repurchase

Ladies and Gentlemen:

In connection with our entry into the Master Confirmation, dated as of March 1, 2021, between JPMorgan Chase Bank, National Association and Domtar Corporation, a Delaware corporation, as amended and supplemented from time to time (the “Master Confirmation”) and the Supplemental Confirmation thereto, dated as of [            ], 20[    ], we hereby represent that set forth below is the total number of shares of our common stock purchased by or for us or any of our affiliated purchasers in Rule 10b-18 purchases of blocks (all as defined in Rule 10b-18 under the Securities Exchange Act of 1934) pursuant to the once-a-week block exception set forth in Rule 10b-18(b)(4) during the four full calendar weeks immediately preceding the first day of the [Calculation Period][Settlement Valuation Period][Seller Termination Purchase Period] (as defined in the Master Confirmation) and the week during which the first day of such [Calculation Period][Settlement Valuation Period][Seller Termination Purchase Period] occurs.

Number of Shares:                    

We understand that you will use this information in calculating trading volume for purposes of Rule 10b-18.

Very truly yours,

B-1

ANNEX A

COUNTERPARTY SETTLEMENT PROVISIONS

1.    The following Counterparty Settlement Provisions shall apply to any Transaction to the extent indicated under the Master Confirmation:

Annex A-1

2.    Net Share Settlement shall be made by delivery on the Cash Settlement Payment Date of a number of Shares satisfying the conditions set forth in paragraph 3 below (the “Registered Settlement Shares”), or a number of Shares not satisfying such conditions (the “Unregistered Settlement Shares”), in either case with a value equal to the absolute value of the Forward Cash Settlement Amount, with such Shares’ value based on the value thereof to JPMorgan (which value shall, in the case of Unregistered Settlement Shares, take into account a commercially reasonable illiquidity discount), in each case as determined by the Calculation Agent. If all of the conditions for delivery of either Registered Settlement Shares or Unregistered Settlement Shares have not been satisfied, Cash Settlement shall be applicable notwithstanding anything to the contrary herein.

3.    Counterparty may only deliver Registered Settlement Shares pursuant to paragraph 2 above if:

(a)    a registration statement covering public resale of the Registered Settlement Shares by JPMorgan (the “Registration Statement”) shall have been filed with the Securities and Exchange Commission under the Securities Act and been declared or otherwise become effective on or prior to the date of delivery, and no stop order shall be in effect with respect to the Registration Statement; a printed prospectus relating to the Registered Settlement Shares (including, without limitation, any prospectus supplement thereto, the “Prospectus”) shall have been delivered to JPMorgan, in such quantities as JPMorgan shall reasonably have requested, on or prior to the date of delivery;

(b)    the form and content of the Registration Statement and the Prospectus (including, without limitation, any sections describing the plan of distribution) shall be satisfactory to JPMorgan;

(c)    as of or prior to the date of delivery, JPMorgan and its agents shall have been afforded a reasonable opportunity to conduct a due diligence investigation with respect to Counterparty customary in scope for underwritten offerings of equity securities and the results of such investigation are satisfactory to JPMorgan, in its discretion; and

(d)    as of the date of delivery, an agreement (the “Underwriting Agreement”) shall have been entered into with JPMorgan in connection with the public resale of the Registered Settlement Shares by JPMorgan substantially similar to underwriting agreements customary for underwritten offerings of equity securities, in form and substance satisfactory to JPMorgan, which Underwriting Agreement shall include, without limitation, provisions substantially similar to those contained in such underwriting agreements relating, without limitation, to the indemnification of, and contribution in connection with the liability of, JPMorgan and its Affiliates and the provision of customary opinions, accountants’ comfort letters and lawyers’ negative assurance letters.

4.    If Counterparty delivers Unregistered Settlement Shares pursuant to paragraph 2 above:

(a)    all Unregistered Settlement Shares shall be delivered to JPMorgan (or any Affiliate of JPMorgan designated by JPMorgan) pursuant to the exemption from the registration requirements of the Securities Act provided by Section 4(a)(2) thereof;

(b)    as of or prior to the date of delivery, JPMorgan and any potential purchaser of any such shares from JPMorgan (or any Affiliate of JPMorgan designated by JPMorgan) identified by JPMorgan shall be afforded a commercially reasonable opportunity to conduct a due diligence investigation with respect to Counterparty customary in scope for private placements of equity securities (including, without limitation, the right to have made available to them for inspection all financial and other records, pertinent corporate documents and other information reasonably requested by them);

(c)    as of the date of delivery, Counterparty shall enter into an agreement (a “Private Placement Agreement”) with JPMorgan (or any Affiliate of JPMorgan designated by JPMorgan) in connection with the private placement of such shares by Counterparty to JPMorgan (or any such Affiliate) and the private resale of such shares by JPMorgan (or any such Affiliate), substantially similar to private placement purchase agreements customary for private placements of equity securities of similar size by similar issuers, in form and substance commercially

Annex A-2

reasonably satisfactory to JPMorgan, which Private Placement Agreement shall include, without limitation, provisions substantially similar to those contained in such private placement purchase agreements relating, without limitation, to the indemnification of, and contribution in connection with the liability of, JPMorgan and its Affiliates and the provision of customary opinions, accountants’ comfort letters and lawyers’ negative assurance letters, and shall provide for the payment by Counterparty of all commercially reasonable fees and expenses of JPMorgan (and any such Affiliate) in connection with such resale, including all commercially reasonable fees and expenses of counsel for JPMorgan, and shall contain representations, warranties, covenants and agreements of Counterparty reasonably necessary or advisable to establish and maintain the availability of an exemption from the registration requirements of the Securities Act for such resales; and

(d)    in connection with the private placement of such shares by Counterparty to JPMorgan (or any such Affiliate) and the private resale of such shares by JPMorgan (or any such Affiliate), Counterparty shall, if so requested by JPMorgan, prepare, in cooperation with JPMorgan, a private placement memorandum in form and substance reasonably satisfactory to JPMorgan.

5.    JPMorgan, itself or through an Affiliate (the “Selling Agent”) or any underwriter(s), will sell, in a commercially reasonable manner and over a commercially reasonable period, all, or such lesser portion as may be required hereunder, of the Registered Settlement Shares or Unregistered Settlement Shares and any Makewhole Shares (as defined below) (together, the “Settlement Shares”) delivered by Counterparty to JPMorgan pursuant to paragraph 6 below commencing on the Cash Settlement Payment Date and continuing until the date on which the aggregate Net Proceeds (as such term is defined below) of such sales, as determined by JPMorgan, is equal to the absolute value of the Forward Cash Settlement Amount (such date, the “Final Resale Date”). If the proceeds of any sale(s) made by JPMorgan, the Selling Agent or any underwriter(s), net of any commercially reasonable fees and commissions (including, without limitation, underwriting or placement fees) customary for similar transactions under the circumstances at the time of the offering, together with carrying charges and expenses incurred in connection with the offer and sale of the Shares (including, without limitation, the covering of any over-allotment or short position (syndicate or otherwise)) (the “Net Proceeds”) exceed the absolute value of the Forward Cash Settlement Amount, JPMorgan will refund, in USD, such excess to Counterparty on the date that is three (3) Currency Business Days following the Final Resale Date, and, if any portion of the Settlement Shares remains unsold, JPMorgan shall return to Counterparty on that date such unsold Shares.

6.    If the Calculation Agent determines that the Net Proceeds received from the sale of the Registered Settlement Shares or Unregistered Settlement Shares or any Makewhole Shares, if any, pursuant to this paragraph 6 are less than the absolute value of the Forward Cash Settlement Amount (the amount in USD by which the Net Proceeds are less than the absolute value of the Forward Cash Settlement Amount being the “Shortfall” and the date on which such determination is made, the “Deficiency Determination Date”), Counterparty shall on the Exchange Business Day next succeeding the Deficiency Determination Date (the “Makewhole Notice Date”) deliver to JPMorgan, through the Selling Agent, a notice of Counterparty’s election that Counterparty shall either (i) pay an amount in cash equal to the Shortfall on the day that is one Currency Business Day after the Makewhole Notice Date, or (ii) deliver additional Shares. If Counterparty elects to deliver to JPMorgan additional Shares, then Counterparty shall deliver additional Shares in compliance with the terms and conditions of paragraph 3 or paragraph 4 above, as the case may be (the “Makewhole Shares”), on the first Clearance System Business Day which is also an Exchange Business Day following the Makewhole Notice Date in such number as the Calculation Agent reasonably believes would have a market value on that Exchange Business Day equal to the Shortfall. Such Makewhole Shares shall be sold by JPMorgan in accordance with the provisions above; provided that if the sum of the Net Proceeds from the sale of the originally delivered Shares and the Net Proceeds from the sale of any Makewhole Shares is less than the absolute value of the Forward Cash Settlement Amount then Counterparty shall, at its election, either make such cash payment or deliver to JPMorgan further Makewhole Shares until such Shortfall has been reduced to zero.

7.    Notwithstanding the foregoing, in no event shall the aggregate number of Settlement Shares for any Transaction be greater than the Reserved Shares minus the amount of any Shares actually delivered by Counterparty under any other Transaction under this Master Confirmation (the result of such calculation, the “Capped Number”). Counterparty represents and warrants (which shall be deemed to be repeated on each day that a Transaction is outstanding) that the Capped Number is equal to or less than the number of Shares determined according to the following formula:

Annex A-3

A – B

“Reserved Shares” means initially, [                ] Shares. The Reserved Shares may be increased or decreased in a Supplemental Confirmation.

If at any time, as a result of this paragraph 7, Counterparty fails to deliver to JPMorgan any Settlement Shares, Counterparty shall, to the extent that Counterparty has at such time authorized but unissued Shares not reserved for other purposes, promptly notify JPMorgan thereof and deliver to JPMorgan a number of Shares not previously delivered as a result of this paragraph 7. Counterparty agrees to use its best efforts to cause the number of authorized but unissued Shares to be increased, if necessary, to an amount sufficient to permit Counterparty to fulfill its obligation to deliver any Settlement Shares.

Annex A-4

ANNEX B

COMMUNICATIONS PROCEDURES

March 1, 2021

I.    Introduction

Domtar Corporation (“Counterparty”) and JPMorgan Chase Bank, National Association (“JPMorgan”) have adopted these communications procedures (the “Communications Procedures”) in connection with entering into the Master Confirmation (the “Master Confirmation”), dated as of March 1, 2021, between JPMorgan and Counterparty relating to Uncollared Accelerated Share Repurchase transactions. These Communications Procedures supplement, form part of, and are subject to the Master Confirmation.

II.    Communications Rules

For each Transaction, from the Trade Date for such Transaction until the date all payments or deliveries of Shares have been made with respect to such Transaction, Counterparty and its Employees and Designees shall not engage in any Program-Related Communication with, or disclose any Material Non-Public Information to, any EDG Trading Personnel. Except as set forth in the preceding sentence, the Master Confirmation shall not limit Counterparty and its Employees and Designees in their communication with Affiliates and Employees of JPMorgan, including, without limitation, Employees who are EDG Permitted Contacts.

III.    Termination

If, in the sole judgment of any EDG Trading Personnel or any Affiliate or Employee of JPMorgan participating in any Communication with Counterparty or any Employee or Designee of Counterparty, such Communication would not be permitted by these Communications Procedures, such EDG Trading Personnel or Affiliate or Employee of JPMorgan shall immediately terminate such Communication. In such case, or if such EDG Trading Personnel or Affiliate or Employee of JPMorgan determines following completion of any Communication with Counterparty or any Employee or Designee of Counterparty that such Communication was not permitted by these Communications Procedures, such EDG Trading Personnel or such Affiliate or Employee of JPMorgan shall promptly consult with his or her supervisors and with counsel for JPMorgan regarding such Communication. If, in the reasonable judgment of JPMorgan’s counsel following such consultation, there is more than an insignificant risk that such Communication could materially jeopardize the availability of the affirmative defenses provided in Rule 10b5-1 under the Exchange Act with respect to any ongoing or contemplated activities of JPMorgan or its Affiliates in respect of any Transaction pursuant to the Master Confirmation, it shall be an Additional Termination Event pursuant to Section 19(a) of the Master Confirmation, with Counterparty as the sole Affected Party and all Transactions under the Master Confirmation as Affected Transactions.

IV.    Definitions

Capitalized terms used and not otherwise defined herein shall have the meanings ascribed to them in the Master Confirmation. As used herein, the following words and phrases shall have the following meanings:

“Communication” means any contact or communication (whether written, electronic, oral or otherwise) between Counterparty or any of its Employees or Designees, on the one hand, and JPMorgan or any of its Affiliates or Employees, on the other hand.

“Designee” means a person designated, in writing or orally, by Counterparty to communicate with JPMorgan on behalf of Counterparty.

“EDG Permitted Contact” means any of [intentionally omitted] or any of their designees; provided that JPMorgan may amend the list of EDG Permitted Contacts by delivering a revised list of EDG Permitted Contacts to Counterparty.

Annex B-1

“EDG Trading Personnel” means [intentionally omitted] and any other Employee of the public side of the Equity Derivatives Group of JPMorgan Chase & Co.; provided that JPMorgan may amend the list of EDG Trading Personnel by delivering a revised list of EDG Trading Personnel to Counterparty; and provided further that, for the avoidance of doubt, the persons listed as EDG Permitted Contacts are not EDG Trading Personnel.

“Employee” means, with respect to any entity, any owner, principal, officer, director, employee or other agent or representative of such entity, and any Affiliate of any of such owner, principal, officer, director, employee, agent or representative.

“Material Non-Public Information” means information relating to Counterparty or the Shares that (a) has not been widely disseminated by wire service, in one or more newspapers of general circulation, by communication from Counterparty to its shareholders or in a press release, or contained in a public filing made by Counterparty with the Securities and Exchange Commission and (b) a reasonable investor might consider to be of importance in making an investment decision to buy, sell or hold Shares. For the avoidance of doubt and solely by way of illustration, information should be presumed “material” if it relates to such matters as dividend increases or decreases, earnings estimates, changes in previously released earnings estimates, significant expansion or curtailment of operations, a significant increase or decline of orders, significant merger or acquisition proposals or agreements, significant new products or discoveries, extraordinary borrowing, major litigation, liquidity problems, extraordinary management developments, purchase or sale of substantial assets and similar matters.

“Program-Related Communication” means any Communication the subject matter of which relates to the Master Confirmation or any Transaction under the Master Confirmation or any activities of JPMorgan (or any of its Affiliates) in respect of the Master Confirmation or any Transaction under the Master Confirmation.

Annex B-2