Clearwater Paper Corp

RESTATED CERTIFICATE OF INCORPORATION OF CLEARWATER PAPER CORPORATION

Clearwater Paper Corporation, a corporation organized and existing under the laws of the State of Delaware, hereby certifies as follows:

FIRST: The name of the corporation is Clearwater Paper Corporation.

SECOND: The original Certificate of Incorporation of the corporation was filed with the Secretary of State of the State of Delaware on October 7, 2005 and the original name of the corporation was Potlatch Forest Products Corporation.

THIRD: Pursuant to Sections 242 and 245 of the General Corporation Law of the State of Delaware, this Restated Certificate of Incorporation restates, integrates and further amends the provisions of the Restated Certificate of Incorporation of the corporation.

FOURTH: The Restated Certificate of Incorporation of the corporation shall be amended and restated to read in full as follows:

ARTICLE I

The name of the corporation is Clearwater Paper Corporation.

ARTICLE II

The address of the registered office of the corporation in the State of Delaware is c/o The Corporation Trust Company, 1209 Orange Street, in the City of Wilmington, County of New Castle. The name of its registered agent at such address is The Corporation Trust Company.

ARTICLE III

The nature of the business or purposes to be conducted or promoted is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware (the “DGCL”).

ARTICLE IV

A. Classes of Stock. The total number of shares of all classes of classes of capital stock that the corporation shall have authority to issue is 105,000,000, of which 100,000,000 shares, par value $0.0001 per share, shall be common stock (“Common Stock”) and 5,000,000 shares, par value $0.0001 per share, shall be preferred stock (“Preferred Stock”). The number of authorized shares of Common Stock or Preferred Stock may be increased or decreased (but not below the number of shares thereof then outstanding) by the affirmative vote of the holders of a majority of the then outstanding shares of Common Stock, without a vote of the holders of Preferred Stock, or of any series thereof, unless a vote of any such Preferred Stock holders is required pursuant to the provisions established by the Board of Directors of the corporation (the “Board of Directors”) in the resolution or resolutions providing for the issue of such Preferred Stock, and if such holders of such Preferred Stock are so entitled to vote thereon, then, except as may otherwise be set forth in this Restated Certificate of Incorporation, the only stockholder approval required shall be the affirmative vote of a majority of the combined voting power of Common Stock and Preferred Stock so entitled to vote.

B. Preferred Stock. Preferred Stock may be issued from time to time in one or more series, as determined by the Board of Directors. The Board of Directors is expressly authorized to provide for the issue, in one or more series, of all or any of the remaining shares of Preferred Stock and, in the resolution or resolutions providing for such issue, to establish for each such series the number of its shares, the voting powers, full or limited, of the shares of such series, or that such shares shall have no voting powers, and the designations, preferences and relative, participating, optional or other special rights of the shares of such series, and the qualifications, limitations or restrictions thereof. The Board of Directors is also expressly authorized (unless forbidden in the resolution or resolutions providing for such issue) to increase or decrease (but not below the number of shares of such series then outstanding) the number of shares of any series subsequent to the issuance of shares of that series. In case the number of shares of any such series shall be so decreased, the shares constituting such decrease shall resume the status that they had prior to the adoption of the resolution originally fixing the number of shares of such series.

C. Series A Participating Preferred Stock. 250,000 shares of the authorized and unissued Preferred Stock of the corporation are hereby designated “Series A Participating Preferred Stock” with the rights, preferences, powers, privileges and restrictions, qualifications and limitations as provided on Exhibit A attached hereto.

D. Common Stock.

1. Relative Rights of Preferred Stock and Common Stock. All preferences, voting powers, relative, participating, optional or other special rights and privileges, and qualifications, limitations, or restrictions of Common Stock are expressly made subject and subordinate to those that may be fixed with respect to any shares of Preferred Stock.

2. Voting Rights. Except as otherwise required by law or this Restated Certificate of Incorporation, each holder of Common Stock shall have one vote in respect of each share of stock held by such holder of record on the books of the corporation for the election of directors and on all matters submitted to a vote of stockholders of the corporation.

3. Dividends. Subject to the preferential rights of the Preferred Stock, the holders of shares of Common Stock shall be entitled to receive, when and if declared by the Board of Directors, out of the assets of the corporation which are by law available therefor, dividends payable either in cash, in property or in shares of capital stock.

4. Dissolution, Liquidation or Winding Up. In the event of any dissolution, liquidation or winding up of the affairs of the corporation, after distribution in full of the preferential amounts, if any, to be distributed to the holders of shares of the Preferred Stock, holders of Common Stock shall be entitled, unless otherwise provided by law or this Restated Certificate of Incorporation, to receive all of the remaining assets of the corporation of whatever kind available for distribution to stockholders ratably in proportion to the number of shares of Common Stock held by them respectively.

ARTICLE V

In furtherance and not in limitation of the powers conferred by the laws of the State of Delaware:

A. The Board of Directors is expressly authorized to adopt, amend or repeal the bylaws of the corporation, provided, however, that the bylaws may only be amended in accordance with the provisions thereof.

B. Elections of directors need not be by written ballot unless the bylaws of the corporation shall so provide.

C. The books of the corporation may be kept at such place within or without the State of Delaware as the bylaws of the corporation may provide or as may be designated from time to time by the Board of Directors.

ARTICLE VI

A. Number of Directors. The business and affairs of the corporation shall be managed by a Board of Directors consisting of not less than five nor more than eleven persons. The exact number of directors of the corporation within the minimum and maximum number specified in the preceding sentence shall be determined from time to time by resolution adopted by the affirmative vote of a majority of the entire Board of Directors at any regular or special meeting of the Board.

B. Classes and Terms of Directors. Commencing with the 2025 annual meeting of stockholders, the Board of Directors, other than those directors elected by the holders of any series of Preferred Stock as provided for or fixed pursuant to the provisions of Article IV of this Restated Certificate of Incorporation, shall be elected annually by the stockholders entitled to vote thereon for terms expiring at the next annual meeting of stockholders; provided however that any director elected or appointed prior to the 2025 annual meeting of stockholders shall serve for the term to which such director has been elected or appointed. At the 2025 annual meeting of stockholders, the term of office of the Class II directors shall expire and successors to the Class II directors shall be elected for a term expiring at the next annual meeting of stockholders and at each succeeding annual meeting of stockholders. At the 2026 annual meeting of stockholders, the term of office of the Class III directors shall expire and successors to the Class III directors shall be elected for a term expiring at the next annual meeting of stockholders and at each succeeding annual meeting of stockholders. At the 2027 annual meeting of stockholders, the term of office of the Class I directors shall expire and successors to the Class I directors shall be elected for a term expiring at the next annual meeting of stockholders and at each succeeding annual meeting of stockholders. From and after the election of directors at the 2027 annual meeting of stockholders, the Board of Directors shall cease to be classified and each director elected at the 2027 annual meeting of stockholders (and at each succeeding annual meeting of stockholders) shall hold office for a term expiring at the next annual meeting of stockholders held after such director’s election. In all cases, each director shall hold office until his or her successor shall be elected and shall qualify or until his or her earlier resignation, removal from office, death or incapacity. Subject to the rights of holders of any series of Preferred Stock, (i) directors of the corporation serving in Class I (with a term expiring at the 2027 annual meeting of stockholders), Class II (with a term expiring at the 2025 annual meeting of stockholders) or Class III (with a term expiring at the corporation’s 2026 annual meeting of stockholders) may be removed only for cause. Following the 2025 annual meeting of stockholders, any director elected or appointed to aone-year term may be removed with or without cause and, following the 2027 annual meeting of stockholders, all directors may be removed with or without cause. For purposes of this Restated Certificate of Incorporation, “2025 annual meeting of stockholders” shall mean the annual meeting of stockholders held following the fiscal year ended December 31, 2024; “2026 annual meeting of stockholders” shall mean the annual meeting of stockholders held following the fiscal year ended December 31, 2025; and “2027 annual meeting of stockholders” shall mean the annual meeting of stockholders held following the fiscal year ended December 31, 2026.

C. Vacancies. Except as otherwise provided for or fixed pursuant to the provisions of Article IV of this Restated Certificate of Incorporation relating to the rights of the holders of any series of Preferred Stock to elect additional directors, and subject to the provisions hereof, newly created directorships resulting from any increase in the authorized number of directors or any vacancies on the Board of Directors resulting from death, resignation or removal, shall be filled, unless otherwise required by law or by resolution of the Board of Directors, only by the affirmative vote of a majority of the remaining directors then in office, even though less than a quorum of the Board of Directors, or by a sole remaining director. Prior to the 2027 annual meeting of stockholders, any director elected or appointed in accordance with the preceding sentence shall hold office for the remainder of the full term of the class of directors in which the new directorship was created or in which the vacancy occurred, and until such director’s successor shall have been duly elected and qualified or until his or her earlier death, resignation or removal from office. From and after the 2027 annual meeting of stockholders, any director elected or appointed in accordance with the first sentence of this paragraph shall hold office until the next succeeding annual meeting of stockholders, and until such director’s successor shall have been duly elected and qualified or until his or her earlier death, resignation or removal from office. Subject to the provisions of this Restated Certificate of Incorporation, no decrease in the number of directors constituting the Board of Directors shall shorten the term of any incumbent director.

ARTICLE VII

Any action required or permitted to be taken by the stockholders of the corporation must be taken at a duly called annual or special meeting of the stockholders of the corporation, and the power of stockholders to consent in writing, without a meeting, to the taking of any action is specifically denied. Subject to the rights of the holders of any series of Preferred Stock, special meetings of the stockholders of the corporation may be called only by the Secretary of the corporation (a) at the written request of the Chair of the Board of the corporation or the Vice Chair of the Board of the corporation, (b) pursuant to a resolution adopted by the affirmative vote of a majority of the Board of Directors or (c) at the request in writing of stockholders owning shares which have a majority of the voting power of the capital stock issued and outstanding and entitled to vote.

ARTICLE VIII

A. Limitation on Liability. To the fullest extent permitted by the DGCL, as the same exists or as may hereafter be amended, a director of the corporation shall not be personally liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director.

B. Indemnification. Each person who is or was a director or officer of the corporation and each director or officer of the corporation who is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust, employee benefit plan or other enterprise (including the heirs, executors, administrators or estate of such person), shall be indemnified and advanced expenses by the corporation, in accordance with the bylaws of the corporation, to the fullest extent authorized by the DGCL, as the same exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the corporation to provide broader indemnification rights than said law permitted the corporation to provide prior to such amendment) or any other applicable laws as presently or hereinafter in effect. The right to indemnification and advancement of expenses hereunder shall not be exclusive of any other right that any person may have or hereafter acquire under any statute, provision of the Restated Certificate of Incorporation, bylaw, agreement, vote of stockholders or disinterested directors or otherwise.

C. Insurance. The corporation may, to the fullest extent permitted by law, purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation or another corporation, partnership, joint venture, trust, employee benefit plan or other enterprise against any expense, liability or loss incurred by such person in any such capacity or arising out of such person’s status as such, whether or not the corporation would have the power to indemnify such person against such expense, liability or loss under the DGCL.

D. Repeal and Modification. Any repeal or modification of the foregoing provisions of this Article VIII shall not adversely affect any right or protection existing hereunder immediately prior to such repeal or modification.

ARTICLE IX

Notwithstanding any other provision of this Restated Certificate of Incorporation, the affirmative vote of the holders of at least 66-2/3% of the voting power of all of the then outstanding shares of the stock of the corporation entitled to vote generally in the election of directors, voting together as a single class, shall be required to amend in any respect or repeal this Article IX, or Articles VI, VII and VIII.

FIFTH: This Restated Certificate of Incorporation was duly adopted by the Board of Directors and the stockholders of the corporation.

SIXTH: This Restated Certificate of Incorporation was duly adopted in accordance with the provisions of Sections 242 and 245 of the General Corporation Law of the State of Delaware.

IN WITNESS WHEREOF, the corporation has caused this certificate to be signed by its President and Chief Executive Officer this day of , 2024.

CLEARWATER PAPER CORPORATION

By

Arsen S. Kitch

President and Chief Executive Officer

CLEARWATER PAPER CORPORATION LEGAL DEPARTMENT 601 W. RIVERSIDE AVENUE SUITE 1100 SPOKANE, WA 99201 1 Investor Address Line 1 Investor Address Line 2 Investor Address Line 3 1 1 OF Investor Address Line 4 Investor Address Line 5 John Sample 1234 ANYWHERE STREET 2 ANY CITY, ON A1A 1A1 SCAN TO VIEW MATERIALS & VOTE VOTE BY INTERNET—www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 P.M. ET on 05/08/2024 for shares held directly and by 11:59 P.M. ET on 05/06/2024 for shares held in a Plan. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. VOTE BYPHONE—1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 P.M. ET on 05/08/2024 for shares held directly and by 11:59 P.M. ET on 05/06/2024 for shares held in a Plan. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. NAME THE COMPANY NAME INC.—COMMON THE COMPANY NAME INC.—CLASS A THE COMPANY NAME INC.—CLASS B THE COMPANY NAME INC.—CLASS C THE COMPANY NAME INC.—CLASS D THE COMPANY NAME INC.—CLASS E THE COMPANY NAME INC.—CLASS F THE COMPANY NAME INC.—401 K CONTROL # → SHARES 123,456,789,012.12345 123,456,789,012.12345 123,456,789,012.12345 123,456,789,012.12345 123,456,789,012.12345 123,456,789,012.12345 123,456,789,012.12345 123,456,789,012.12345 PAGE 1 OF 2 x TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. The Board of Directors recommends you vote FOR 2 0 the following: 1. Election of Directors Nominees For Against Abstain 0000000000 1a. John J. Corkrean 1b. Arsen S. Kitch NOTE: This proxy proposal will be voted as directed but if not otherwise directed, for each director and for proposals 2,3 and 4. 1c. Alexander Toeldte The Board of Directors recommends you vote FOR proposals 2, 3 and 4. For Against Abstain 2 Ratification of the appointment of KPMG, LLP as the Company’s independent registered public accounting firm for 2024. 3 Advisory vote to approve named executive officer compensation. 4 Approval and adoption of restated certificate of incorporation to declassify the Board. For address change/comments, mark here. Investor Address Line 1 (see reverse for instructions) Yes No Investor Address Line 2 Please indicate if you plan to attend this meeting Investor Address Line 3 Investor Address Line 4 Investor Address Line 5 Please sign exactly as your name(s) appear(s) hereon. When signing as John Sample attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must 1234 ANYWHERE STREET sign. If a corporation or partnership, please sign in full corporate or ANY CITY, ON A1A 1A1 partnership name by an authorized officer. SHARES CUSIP # JOB # SEQUENCE # Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date

To register to attend the webcast of the Annual Meeting go to https://register.proxypush.com/CLW. Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice & Proxy Statement, Annual Report/10K is/are available at www.proxyvote.com . CLEARWATER PAPER CORPORATION Annual Meeting of Stockholders May 9, 2024 9:00 AM This proxy is solicited by the Board of Directors Common: The undersigned hereby appoints Arsen S. Kitch, Sherri J. Baker and Michael S. Gadd, or any one of them, as proxies, each with full power to act without the others and with the powers of substitution in each, and hereby authorizes them to represent and vote, as designated on the reverse side of this ballot, all of the shares of stock of CLEARWATER PAPER CORPORATION that the undersigned is/are entitled to vote at the Annual Meeting of Stockholders to be held at 09:00 AM, PDT on May 9, 2024, at 721 Pine Street, Seattle, WA 98101, and any adjournment or postponement thereof. Address change/comments: (If you noted any Address Changes and/or Comments above, please mark corresponding box on the reverse side.) Continued and to be signed on reverse side