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    Amendment: SEC Form SCHEDULE 13D/A filed by Apellis Pharmaceuticals Inc.

    5/14/26 4:36:06 PM ET
    $APLS
    Biotechnology: Pharmaceutical Preparations
    Health Care
    Get the next $APLS alert in real time by email



    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13D

    Under the Securities Exchange Act of 1934

    (Amendment No. 1)


    Apellis Pharmaceuticals, Inc.

    (Name of Issuer)


    Common Stock, par value $0.0001 per share

    (Title of Class of Securities)




    03753U106

    (CUSIP Number)
    Wendell Taylor, Secretary
    225 Binney Street,
    Cambridge, MA, 02142
    (617) 679-2000

    (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
    05/14/2026

    (Date of Event Which Requires Filing of This Statement)


    If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

    The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




    schemaVersion:


    SCHEDULE 13D

    CUSIP Number(s):
    03753U106


    1 Name of reporting person

    Biogen Inc.
    2Check the appropriate box if a member of a Group (See Instructions)

    Checkbox not checked  (a)
    Checkbox checked  (b)
    3SEC use only
    4 Source of funds (See Instructions)

    OO
    5 Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

    Checkbox not checked
    6Citizenship or place of organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    0.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    0.00
    11Aggregate amount beneficially owned by each reporting person

    0.00
    12Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

    Checkbox not checked
    13Percent of class represented by amount in Row (11)

    0.0 %
    14Type of Reporting Person (See Instructions)

    CO

    Comment for Type of Reporting Person:
    This Amendment No. 1 to Schedule 13D (this "Amendment") relates to the common stock, par value $0.0001 per share (the "Shares"), of Apellis Pharmaceuticals, Inc., a Delaware corporation ("Apellis") and amends and supplements the statement on Schedule 13D originally filed by Biogen Inc., a Delaware corporation ("Biogen"), on April 6, 2026 (the "Prior Schedule 13D"). The filing of this Amendment represents the final amendment to the Prior Schedule 13D and constitutes an exit filing for the Reporting Person. Except as otherwise specified in this Amendment, all items left blank remain unchanged in all material respects and any items that are reported are deemed to amend and restate the corresponding items in the Prior Schedule 13D. Unless otherwise indicated, all capitalized terms used herein but not defined herein shall have the same meanings ascribed to them in the Prior Schedule 13D.


    SCHEDULE 13D

    Item 1.Security and Issuer
    (a)Title of Class of Securities:

    Common Stock, par value $0.0001 per share
    (b)Name of Issuer:

    Apellis Pharmaceuticals, Inc.
    (c)Address of Issuer's Principal Executive Offices:

    100 Fifth Avenue, Waltham, MASSACHUSETTS , 02451.
    Item 4.Purpose of Transaction
     
    Item 4 of the Prior Schedule 13D is hereby amended and supplemented by adding the following at the end thereof: As previously disclosed, on March 31, 2026, Biogen entered into an Agreement and Plan of Merger (the "Merger Agreement") with Apellis and Aspen Purchaser Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Biogen ("Purchaser"). Pursuant to the Merger Agreement, on April 14, 2026, Purchaser commenced a tender offer (the "Offer") to acquire any and all outstanding Shares, in exchange for (i) $41.00 per Share, net to the seller in cash, without interest and subject to reduction for any applicable tax withholding (the "Cash Amount"), plus (ii) one contractual, non-transferable contingent value right per Share (each, a "CVR") representing the right to receive contingent cash payments of up to an aggregate of $4.00 in cash, without interest and subject to reduction for any applicable tax withholding, upon the achievement of certain specified milestones, in each case upon the terms and subject to the conditions set forth in the Offer to Purchase, dated April 14, 2026 (as amended or supplemented from time to time, the "Offer to Purchase") and in the related Letter of Transmittal. As a result of the satisfaction of the Minimum Condition (as defined in the Offer) and each of the other conditions to the Offer, on May 14, 2026, Purchaser irrevocably accepted for payment all Shares that were validly tendered (and not validly withdrawn) pursuant to the Offer. Following the completion of the Offer, on May 14, 2026, pursuant to the terms of the Merger Agreement, Purchaser merged with and into Apellis, without a vote of the stockholders of Apellis in accordance with Section 251(h) of the General Corporation Law of the State of Delaware, with Apellis continuing as the surviving corporation of the merger and as a wholly owned subsidiary of Biogen (the "Merger").
    Item 5.Interest in Securities of the Issuer
    (a)
    Items 5(a), (b) and (e) of the Prior Schedule 13D are hereby amended and supplemented by adding the following at the end thereof: On May 14, 2026, the Merger was consummated and Purchaser was merged with and into Apellis, with Apellis surviving the Merger as a wholly owned subsidiary of Biogen. Upon the consummation of the Merger, the Tender and Support Agreement automatically terminated pursuant to its terms and is of no further force or effect.

        SIGNATURE 
     
    After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

     
    Biogen Inc.
     
    Signature:/s/ Wendell Taylor
    Name/Title:Wendell Taylor / Secretary
    Date:05/14/2026
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