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    Amendment: SEC Form SCHEDULE 13D/A filed by Sinovac Biotech, Ltd.

    4/29/25 4:00:57 PM ET
    $SVA
    Major Pharmaceuticals
    Health Care
    Get the next $SVA 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. 16)


    SINOVAC BIOTECH LTD.

    (Name of Issuer)


    Common Shares, par value US$0.001 per share

    (Title of Class of Securities)


    P8696W104

    (CUSIP Number)


    Andrew Y Yan
    c/o Suite 1102, Five Pacific Place, 28 Hennessy Road, Wanchai
    Hong Kong, K3, 00000
    852 2918-2200

    (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
    04/28/2025

    (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).






    SCHEDULE 13D

    CUSIP No.
    P8696W104


    1 Name of reporting person

    SAIF Partners IV L.P.
    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)

    WC
    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

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

    10,780,820.00
    8Shared Voting Power

    0.00
    9Sole Dispositive Power

    10,780,820.00
    10Shared Dispositive Power

    0.00
    11Aggregate amount beneficially owned by each reporting person

    10,780,820.00
    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)

    15.00 %
    14Type of Reporting Person (See Instructions)

    PN

    Comment for Type of Reporting Person:
    Comments to item 13: Calculation is based on 71,860,702 Common Shares of the Issuer outstanding as of March 31, 2024 according to the Issuer's annual report on Form 20-F for the fiscal year ended December 31, 2023 (the "2023 Annual Report").


    SCHEDULE 13D

    CUSIP No.
    P8696W104


    1 Name of reporting person

    SAIF IV GP, L.P.
    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)

    WC
    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

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

    10,780,820.00
    8Shared Voting Power

    0.00
    9Sole Dispositive Power

    10,780,820.00
    10Shared Dispositive Power

    0.00
    11Aggregate amount beneficially owned by each reporting person

    10,780,820.00
    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)

    15.00 %
    14Type of Reporting Person (See Instructions)

    PN

    Comment for Type of Reporting Person:
    Comments to item 13: Calculation is based on 71,860,702 Common Shares of the Issuer outstanding as of March 31, 2024 according to the 2023 Annual Report.


    SCHEDULE 13D

    CUSIP No.
    P8696W104


    1 Name of reporting person

    SAIF IV GP Capital Ltd.
    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)

    WC
    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

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

    10,780,820.00
    8Shared Voting Power

    0.00
    9Sole Dispositive Power

    10,780,820.00
    10Shared Dispositive Power

    0.00
    11Aggregate amount beneficially owned by each reporting person

    10,780,820.00
    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)

    15.00 %
    14Type of Reporting Person (See Instructions)

    CO

    Comment for Type of Reporting Person:
    Comments to item 13: Calculation is based on 71,860,702 Common Shares of the Issuer outstanding as of March 31, 2024 according to the 2023 Annual Report.


    SCHEDULE 13D

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

    Common Shares, par value US$0.001 per share
    (b)Name of Issuer:

    SINOVAC BIOTECH LTD.
    (c)Address of Issuer's Principal Executive Offices:

    No. 39 Shangdi Xi Rd, Haidian District, Beijing, CHINA , 100085.
    Item 1 Comment:
    This Amendment No.16 to Schedule 13D is being filed on behalf of each of SAIF Partners IV L.P., SAIF IV GP, L.P., and SAIF IV GP Capital Ltd. (each, a "Reporting Person," and collectively, the "Reporting Persons"), to amend the Schedule 13D relating to the common shares, par value $0.001 per share (the "Common Shares"), of Sinovac Biotech Ltd. (the "Issuer"), filed by the Reporting Persons on May 31, 2011, as amended by Amendment No.1 to Schedule 13D filed on August 23, 2011, Amendment No.2 to Schedule 13D filed on September 30, 2011, Amendment No.3 to Schedule 13D filed on November 29, 2011, Amendment No.4 to Schedule 13D filed on December 30, 2011, Amendment No.5 to Schedule 13D filed on February 2, 2016, Amendment No. 6 to Schedule 13D filed on June 26, 2017, Amendment No. 7 to Schedule 13D filed on December 12, 2022, Amendment No. 8 to Schedule 13D filed on March 15, 2023, Amendment No. 9 to Schedule 13D filed on May 25, 2023, Amendment No. 10 to Schedule 13D filed on September 15, 2023, Amendment No. 11 to Schedule 13D filed on December 1, 2023, Amendment No. 12 to Schedule 13D filed on June 17, 2024, Amendment No. 13 to Schedule 13D filed on September 12, 2024, Amendment No. 14 to Schedule 13D filed on February 19, 2025, and Amendment No. 15 to Schedule 13D filed on March 19, 2025 (collectively, the "Original Schedule 13D"). The information in each Item below amends the information disclosed under the corresponding Item of the Original Schedule 13D. Except as amended and supplemented in previous amendments and herein, the information set forth in the Original Schedule 13D remains unchanged. Capitalized terms used herein have meanings as assigned thereto in the Original Schedule 13D unless defined herein. The information set forth in response to each separate Item below shall be deemed to be a response to all Items where such information is relevant.
    Item 4.Purpose of Transaction
     
    Item 4 is hereby amended and supplemented to add the following: On April 28, 2025, at the request of SAIF Partners IV L.P. ("SAIF"), Cede & Co., as nominee of The Depository Trust Company and the holder of record of the 10,780,820 shares of the Issuer beneficially owned by SAIF, submitted a requisition to the board of directors (the "Board") of the Issuer (the "Requisition"), to convene a special shareholders' meeting of the Issuer (the "Special Shareholders' Meeting") for the purposes of (i) removing each of David Guowei Wang, Pengfei Li, and Sven H. Borho from the Board as well as any other person or persons elected or appointed to the Board without shareholders' approval after February 8, 2025 and up to and including the date of the Special Shareholders' Meeting (other than any Nominee set forth below), effective immediately (the "Removal Proposal"), and (ii) electing each of Simon Anderson, Shan Fu, Shuge Jiao, Chiang Li, Yuk Lam Lo, Yumin Qiu, Yu Wang, Rui-Ping Xiao, Andrew Y Yan, and Weidong Yin (each a "Nominee" and collectively, the "Nominees") to the Board, effective immediately (the "Election Proposal"). The foregoing summary of the Requisition is not intended to be complete and is qualified in its entirety by reference to the full text of the Requisition letter, which is filed as Exhibit 1 hereto and is incorporated herein by reference. The Reporting Persons have also engaged in preliminary discussions with other shareholders of the Issuer regarding Cede & Co.'s submission of the Requisition. The Reporting Persons plan to continue communicating with the Issuer and with other shareholders regarding these and similar matters. Depending upon, among other things, the outcome of these communications, the financial condition, results of operations and prospects of the Issuer, conditions in the securities markets, general economic conditions and other factors that the Reporting Persons deem relevant, the Reporting Persons may take other steps seeking to bring about changes to the Board that it believes would increase shareholder value as well as pursue other plans or proposals that relate to or would result in any of the matters set forth in clauses (a)-(j) of Item 4 of Schedule 13D.
    Item 6.Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
     
    Item 6 is hereby amended and supplemented to add the following: Item 4 of Amendment No. 16 is incorporated herein by reference.
    Item 7.Material to be Filed as Exhibits.
     
    Exhibit 1 Requisition

        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.

     
    SAIF Partners IV L.P.
     
    Signature:/s/Andrew Y Yan
    Name/Title:Director of SAIF IV GP Capital Ltd., which is the General Partner of SAIF IV GP, L.P., which is the General Partner of SAIF Partners IV L.P.
    Date:04/28/2025
     
    SAIF IV GP, L.P.
     
    Signature:/s/Andrew Y Yan
    Name/Title:Director of SAIF IV GP Capital Ltd., which is the General Partner of SAIF IV GP, L.P.
    Date:04/28/2025
     
    SAIF IV GP Capital Ltd.
     
    Signature:/s/Andrew Y Yan
    Name/Title:Director of SAIF IV GP Capital Ltd.
    Date:04/28/2025
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