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    SEC Form SCHEDULE 13D filed by Under Armour Inc.

    1/5/26 4:32:10 PM ET
    $UAA
    Apparel
    Consumer Discretionary
    Get the next $UAA alert in real time by email



    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13D

    Under the Securities Exchange Act of 1934

    Under Armour, Inc.

    (Name of Issuer)


    Class A Common Stock ("Class A Shares")

    (Title of Class of Securities)


    904311107

    (CUSIP Number)


    Sean J. Skiffington
    Allen Overy Shearman Sterling US LLP, Commerce Court West, 199 Bay Street
    Toronto, A6, M5L 1E8
    647.280.5756


    Ryan E. Robski
    Allen Overy Shearman Sterling US LLP, Commerce Court West, 199 Bay Street
    Toronto, A6, M5L 1E8
    416.302.1391

    (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
    12/30/2025

    (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 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.
    904311107


    1 Name of reporting person

    V. PREM WATSA
    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

    CANADA (FEDERAL LEVEL)
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    41,958,923.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    41,958,923.00
    11Aggregate amount beneficially owned by each reporting person

    41,958,923.00
    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)

    22.2 %
    14Type of Reporting Person (See Instructions)

    IN



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    THE SECOND 810 HOLDCO 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)

    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

    CANADA (FEDERAL LEVEL)
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    41,958,923.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    41,958,923.00
    11Aggregate amount beneficially owned by each reporting person

    41,958,923.00
    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)

    22.2 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    THE SECOND 1109 HOLDCO 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)

    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

    CANADA (FEDERAL LEVEL)
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    41,958,923.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    41,958,923.00
    11Aggregate amount beneficially owned by each reporting person

    41,958,923.00
    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)

    22.2 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    THE SIXTY TWO INVESTMENT COMPANY LIMITED
    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

    BRITISH COLUMBIA, CANADA
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    41,958,923.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    41,958,923.00
    11Aggregate amount beneficially owned by each reporting person

    41,958,923.00
    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)

    22.2 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    FAIRFAX FINANCIAL HOLDINGS LIMITED
    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

    CANADA (FEDERAL LEVEL)
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    41,958,923.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    41,958,923.00
    11Aggregate amount beneficially owned by each reporting person

    41,958,923.00
    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)

    22.2 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    FFHL GROUP 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)

    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

    CANADA (FEDERAL LEVEL)
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    28,428,449.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    28,428,449.00
    11Aggregate amount beneficially owned by each reporting person

    28,428,449.00
    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)

    15.1 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    FAIRFAX (US) 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

    28,428,449.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    28,428,449.00
    11Aggregate amount beneficially owned by each reporting person

    28,428,449.00
    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)

    15.1 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ODYSSEY GROUP HOLDINGS, 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

    9,799,447.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    9,799,447.00
    11Aggregate amount beneficially owned by each reporting person

    9,799,447.00
    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)

    5.2 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ODYSSEY REINSURANCE COMPANY
    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

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

    0.00
    8Shared Voting Power

    9,799,447.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    9,799,447.00
    11Aggregate amount beneficially owned by each reporting person

    9,799,447.00
    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)

    5.2 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    CRUM & FORSTER HOLDINGS CORP.
    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

    18,629,002.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    18,629,002.00
    11Aggregate amount beneficially owned by each reporting person

    18,629,002.00
    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)

    9.9 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    UNITED STATES FIRE INSURANCE COMPANY
    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

    18,629,002.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    18,629,002.00
    11Aggregate amount beneficially owned by each reporting person

    18,629,002.00
    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)

    9.9 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    THE NORTH RIVER INSURANCE COMPANY
    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

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

    0.00
    8Shared Voting Power

    4,537,154.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    4,537,154.00
    11Aggregate amount beneficially owned by each reporting person

    4,537,154.00
    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)

    2.4 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    FAIRFAX UK HOLDINGS LIMITED
    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

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

    0.00
    8Shared Voting Power

    2,873,000.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    2,873,000.00
    11Aggregate amount beneficially owned by each reporting person

    2,873,000.00
    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)

    1.5 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    BRIT GROUP HOLDINGS LIMITED
    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

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

    0.00
    8Shared Voting Power

    2,873,000.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    2,873,000.00
    11Aggregate amount beneficially owned by each reporting person

    2,873,000.00
    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)

    1.5 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    BRIT INSURANCE HOLDINGS LIMITED
    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

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

    0.00
    8Shared Voting Power

    2,873,000.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    2,873,000.00
    11Aggregate amount beneficially owned by each reporting person

    2,873,000.00
    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)

    1.5 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    BRIT REINSURANCE (BERMUDA) LIMITED
    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

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

    0.00
    8Shared Voting Power

    2,873,000.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    2,873,000.00
    11Aggregate amount beneficially owned by each reporting person

    2,873,000.00
    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)

    1.5 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    1102952 B.C. UNLIMITED LIABILITY COMPANY
    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

    BRITISH COLUMBIA, CANADA
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    10,657,474.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    10,657,474.00
    11Aggregate amount beneficially owned by each reporting person

    10,657,474.00
    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)

    5.6 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, 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)

    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

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

    0.00
    8Shared Voting Power

    10,657,474.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    10,657,474.00
    11Aggregate amount beneficially owned by each reporting person

    10,657,474.00
    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)

    5.6 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ALLIED WORLD ASSURANCE COMPANY HOLDINGS I, 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)

    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

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

    0.00
    8Shared Voting Power

    10,657,474.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    10,657,474.00
    11Aggregate amount beneficially owned by each reporting person

    10,657,474.00
    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)

    5.6 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ALLIED WORLD ASSURANCE COMPANY, 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)

    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

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

    0.00
    8Shared Voting Power

    10,657,474.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    10,657,474.00
    11Aggregate amount beneficially owned by each reporting person

    10,657,474.00
    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)

    5.6 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ALLIED WORLD ASSURANCE HOLDINGS (IRELAND) 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)

    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

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

    0.00
    8Shared Voting Power

    8,028,748.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    8,028,748.00
    11Aggregate amount beneficially owned by each reporting person

    8,028,748.00
    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)

    4.3 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ALLIED WORLD ASSURANCE HOLDINGS (U.S.) 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

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

    0.00
    8Shared Voting Power

    8,028,748.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    8,028,748.00
    11Aggregate amount beneficially owned by each reporting person

    8,028,748.00
    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)

    4.3 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ALLIED WORLD INSURANCE COMPANY
    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

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

    0.00
    8Shared Voting Power

    8,028,748.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    8,028,748.00
    11Aggregate amount beneficially owned by each reporting person

    8,028,748.00
    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)

    4.3 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    AW UNDERWRITERS 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

    607,700.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    607,700.00
    11Aggregate amount beneficially owned by each reporting person

    607,700.00
    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)

    0.3 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

    CUSIP No.
    904311107


    1 Name of reporting person

    ALLIED WORLD SPECIALTY INSURANCE COMPANY
    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

    607,700.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    607,700.00
    11Aggregate amount beneficially owned by each reporting person

    607,700.00
    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)

    0.3 %
    14Type of Reporting Person (See Instructions)

    CO



    SCHEDULE 13D

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

    Class A Common Stock ("Class A Shares")
    (b)Name of Issuer:

    Under Armour, Inc.
    (c)Address of Issuer's Principal Executive Offices:

    101 PERFORMANCE DRIVE, BALTIMORE, MARYLAND , 21230.
    Item 2.Identity and Background
    (a)
    (i) V. PREM WATSA (ii) THE SECOND 810 HOLDCO LTD. (iii) THE SECOND 1109 HOLDCO LTD. (iv) THE SIXTY TWO INVESTMENT COMPANY LIMITED (v) FAIRFAX FINANCIAL HOLDINGS LIMITED (vi) FFHL GROUP LTD. (vii) FAIRFAX (US) INC. (viii) ODYSSEY GROUP HOLDINGS, INC. (ix) ODYSSEY REINSURANCE COMPANY (x) CRUM & FORSTER HOLDINGS CORP. (xi) UNITED STATES FIRE INSURANCE COMPANY (xii) THE NORTH RIVER INSURANCE COMPANY (xiii) FAIRFAX UK HOLDINGS LIMITED (xiv) BRIT GROUP HOLDINGS LIMITED (xv) BRIT INSURANCE HOLDINGS LIMITED (xvi) BRIT REINSURANCE (BERMUDA) LIMITED (xvii) 1102952 B.C. UNLIMITED LIABILITY COMPANY (xviii) ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD (xix) ALLIED WORLD ASSURANCE COMPANY HOLDINGS I, LTD (xx) ALLIED WORLD ASSURANCE COMPANY, LTD (xxi) ALLIED WORLD ASSURANCE HOLDINGS (IRELAND) LTD (xxii) ALLIED WORLD ASSURANCE HOLDINGS (U.S.) INC. (xxiii) ALLIED WORLD INSURANCE COMPANY (xxiv) AW UNDERWRITERS INC. (xxv) ALLIED WORLD SPECIALTY INSURANCE COMPANY
    (b)
    (i) 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada M5J 2N7 (ii) 95 Wellington Street West, Suite 802, Toronto, Ontario, Canada M5J 2N7 (iii) 95 Wellington Street West, Suite 802, Toronto, Ontario, Canada M5J 2N7 (iv) 1600 Cathedral Place, 925 West Georgia St., Vancouver, British Columbia, Canada V6C 3L2 (v) 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada M5J 2N7 (vi) 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada M5J 2N7 (vii) 401 East Corporate Drive, Suite 200, Lewisville, Texas, 75057, USA (viii) 300 First Stamford Place, Stamford, Connecticut, USA 06902 (ix) 300 First Stamford Place, Stamford, Connecticut, USA 06902 (x) 1209 Orange Street, Wilmington, Delaware, USA 19801 (xi) 1209 Orange Street, Wilmington, Delaware, USA 19801 (xii) 305 Madison Avenue, Morristown, New Jersey, USA, 07962 (xiii) The Leadenhall Building, 122 Leadenhall Street, London, United Kingdom, EC3V 4AB; (xiv) The Leadenhall Building, 122 Leadenhall Street, London, United Kingdom, EC3V 4AB; (xv) The Leadenhall Building, 122 Leadenhall Street, London, United Kingdom, EC3V 4AB; (xvi) Clarendon House, 2 Church Street, Hamilton, Bermuda HM 11 (xvii) 1600 Cathedral Place, 925 West Georgia St., Vancouver, British Columbia, Canada V6C 3L2 (xviii) 27 Richmond Road, Pembroke, Bermuda HM 08 (xix) 27 Richmond Road, Pembroke, Bermuda HM 08 (xx) 27 Richmond Road, Pembroke, Bermuda HM 08 (xxi) 27 Richmond Road, Pembroke, Bermuda HM 08 (xxii) 1209 Orange Street, Wilmington, Delaware, USA 19801 (xxviii) 199 Water Street, 26th Floor, New York, New York USA 10038 (xxiv) 199 Water Street, 26th Floor, New York, New York USA 10038 (xxv) 199 Water Street, 26th Floor, New York, New York USA 10038
    (c)
    For each of the Reporting Persons, a full response to Item 2(c) Present principal occupation or employment and the name, principal business and address of any corporation or other organization in which such employment is conducted is set forth in Exhibit 99.1 hereto.
    (d)
    (i) No (ii) No (iii) No (iv) No (v) No (vi) No (vii) No (viii) No (ix) No (x) No (xi) No (xii) No (xiii) No (xiv) No (xv) No (xvi) No (xvii) No (xviii) No (xix) No (xx) No (xxi) No (xxii) No (xxiii) No (xxiv) No (xxv) No
    (e)
    (i) No (ii) No (iii) No (iv) No (v) No (vi) No (vii) No (viii) No (ix) No (x) No (xi) No (xii) No (xiii) No (xiv) No (xv) No (xvi) No (xvii) No (xviii) No (xix) No (xx) No (xxi) No (xxii) No (xxiii) No (xxiv) No (xxv) No
    (f)
    (i) CANADA (ii) CANADA (iii) CANADA (iv) BRITISH COLUMBIA (v) CANADA (vi) CANADA (vii) DELAWARE (viii) DELAWARE (ix) CONNECTICUT (x) DELAWARE (xi) DELAWARE (xii) NEW JERSEY (xiii) UNITED KINGDOM (xiv) UNITED KINGDOM (xv) UNITED KINGDOM (xvi) BERMUDA (xvii) CANADA (xviii) BERMUDA (xix) BERMUDA (xx) BERMUDA (xxi) BERMUDA (xxii) DELAWARE (xxviii) NEW HAMPSHIRE (xxiv) DELAWARE (xxv) DELAWARE
    Item 3.Source and Amount of Funds or Other Consideration
     
    The source of funds for the purchase of the Class A Shares beneficially owned by the Reporting Persons was cash on hand from existing investment portfolios.
    Item 4.Purpose of Transaction
     
    The Reporting Persons acquired the Class A Shares for investment purposes. One or more entities affiliated with Fairfax, including one or more of the Reporting Persons, may determine to purchase additional securities of Under Armour, Inc. in the open market or otherwise, depending upon price, market conditions, availability of funds, evaluation of alternative investments and other factors. While none of the Reporting Persons has any present plans to sell any Shares or other securities of Under Armour, Inc., one or more of them could determine, based upon the same set of factors listed above with respect to purchases, to sell some or all of such securities. The Reporting Persons have no present intention to effect any of the transactions specified in Item 4 of Schedule 13D.
    Item 5.Interest in Securities of the Issuer
    (a)
    Based on the most recent information available, the aggregate number and percentage of Shares (the securities identified by Item 1 of this Schedule 13D) that are beneficially owned by each of the Reporting Persons is set forth in boxes 11 and 13 of this Schedule 13D for each of the Reporting Persons, and such information is incorporated herein by reference. The percentage of Class A Shares beneficially owned by each of the Reporting Persons was calculated based on 188,834,386 Class A Shares outstanding as of October 31, 2025, as reported by Under Armour, Inc.
    (b)
    The numbers of Class A Shares as to which each of the Reporting Persons has sole voting power, shared voting power, sole dispositive power and shared dispositive power is set forth in boxes 7, 8, 9 and 10, respectively, on the second part of the cover page to this Schedule 13D for each of the Reporting Persons, and such information is incorporated herein by reference.
    (c)
    Except as described in Exhibit 99.2, none of the Reporting Persons, nor, to the best knowledge of the Reporting Persons, any person listed in Exhibit 99.1 for each of the Reporting Persons, beneficially owns, or has acquired or disposed of, any Class A Shares during the last 60 days.
    (d)
    No person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of Class A Shares held by the Reporting Persons other than each of the Reporting Persons.
    (e)
    Not applicable.
    Item 6.Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer
     
    None.
    Item 7.Material to be Filed as Exhibits.
     
    Exhibit 99.1 Directors and Officers of the Reporting Persons Exhibit 99.2 Transactions in the Class A Shares of the Issuer by the Reporting Persons During the Last Sixty (60) Days Exhibit 99.3 Joint Filing Agreement dated as of January 5, 2026 among the Reporting Persons

        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.

     
    V. PREM WATSA
     
    Signature:/s/ V. Prem Watsa
    Name/Title:V. Prem Watsa
    Date:01/05/2026
     
    THE SECOND 810 HOLDCO LTD.
     
    Signature:/s/ V. Prem Watsa
    Name/Title:V. Prem Watsa, Director
    Date:01/05/2026
     
    THE SECOND 1109 HOLDCO LTD.
     
    Signature:/s/ V. Prem Watsa
    Name/Title:V. Prem Watsa, President
    Date:01/05/2026
     
    THE SIXTY TWO INVESTMENT COMPANY LIMITED
     
    Signature:/s/ V. Prem Watsa
    Name/Title:V. Prem Watsa, President
    Date:01/05/2026
     
    FAIRFAX FINANCIAL HOLDINGS LIMITED
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, President and Chief Operating Officer
    Date:01/05/2026
     
    FFHL GROUP LTD.
     
    Signature:/s/ V. Prem Watsa
    Name/Title:V. Prem Watsa, President
    Date:01/05/2026
     
    FAIRFAX (US) INC.
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ODYSSEY GROUP HOLDINGS, INC.
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ODYSSEY REINSURANCE COMPANY
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    CRUM & FORSTER HOLDINGS CORP.
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    UNITED STATES FIRE INSURANCE COMPANY
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    THE NORTH RIVER INSURANCE COMPANY
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    FAIRFAX UK HOLDINGS LIMITED
     
    Signature:/s/ Gavin Wilkinson
    Name/Title:Gavin Wilkinson, Group Chief Financial Officer
    Date:01/05/2026
     
    BRIT GROUP HOLDINGS LIMITED
     
    Signature:/s/ Gavin Wilkinson
    Name/Title:Gavin Wilkinson, Group Chief Financial Officer
    Date:01/05/2026
     
    BRIT INSURANCE HOLDINGS LIMITED
     
    Signature:/s/ Gavin Wilkinson
    Name/Title:Gavin Wilkinson, Group Chief Financial Officer
    Date:01/05/2026
     
    BRIT REINSURANCE (BERMUDA) LIMITED
     
    Signature:/s/ Gavin Wilkinson
    Name/Title:Gavin Wilkinson, Group Chief Financial Officer
    Date:01/05/2026
     
    1102952 B.C. UNLIMITED LIABILITY COMPANY
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ALLIED WORLD ASSURANCE COMPANY HOLDINGS I, LTD
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ALLIED WORLD ASSURANCE COMPANY, LTD
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ALLIED WORLD ASSURANCE HOLDINGS (IRELAND) LTD
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ALLIED WORLD ASSURANCE HOLDINGS (U.S.) INC.
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ALLIED WORLD INSURANCE COMPANY
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    AW UNDERWRITERS INC.
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
     
    ALLIED WORLD SPECIALTY INSURANCE COMPANY
     
    Signature:/s/ Peter Clarke
    Name/Title:Peter Clarke, Attorney-In-Fact
    Date:01/05/2026
    Comments accompanying signature:
    Power of attorney, dated March 9, 2020 (incorporated by reference to Exhibit 8 to the Schedule 13D filed by certain of the Reporting Persons with the SEC on March 9, 2020). Power of attorney, dated June 14, 2021 (incorporated by reference to Exhibit 5 to the Schedule 13D filed by certain of the Reporting Persons with the SEC on June 14, 2021).
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    Kevin Plank to Become Chief Executive Officer; Mohamed A. El-Erian, Under Armour's Lead Director, Named Chair of the Board BALTIMORE, March 13, 2024 /PRNewswire/ -- Under Armour, Inc. (NYSE:UA, UAA))) today announced that Kevin Plank will become President & Chief Executive Officer, effective April 1, 2024. Plank will succeed Stephanie Linnartz, who will be stepping down as President & Chief Executive Officer and member of the Board. In connection with Plank's appointment, Dr. Mohamed A. El-Erian, an independent director since 2018 and Lead Director since 2020, will become the non-executive Chair of the Board. Plank, who will transition from Executive Chair of the Board, will remain a directo

    3/13/24 4:30:00 PM ET
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    Amendment: SEC Form SC 13G/A filed by Under Armour Inc.

    SC 13G/A - Under Armour, Inc. (0001336917) (Subject)

    11/12/24 5:55:44 PM ET
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    Amendment: SEC Form SC 13G/A filed by Under Armour Inc.

    SC 13G/A - Under Armour, Inc. (0001336917) (Subject)

    11/12/24 5:47:11 PM ET
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    Amendment: SEC Form SC 13G/A filed by Under Armour Inc.

    SC 13G/A - Under Armour, Inc. (0001336917) (Subject)

    11/7/24 9:24:55 AM ET
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