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    Amendment: SEC Form SCHEDULE 13G/A filed by SEALSQ Corp

    7/29/25 3:48:39 PM ET
    $LAES
    Semiconductors
    Technology
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    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13G


    UNDER THE SECURITIES EXCHANGE ACT OF 1934
    (Amendment No. 1)


    SEALSQ Corp

    (Name of Issuer)


    Ordinary Shares, par value $0.01 per share

    (Title of Class of Securities)


    G79483106

    (CUSIP Number)


    06/30/2025

    (Date of Event Which Requires Filing of this Statement)


    Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
    Checkbox not checked   Rule 13d-1(b)
    Checkbox not checked   Rule 13d-1(c)
    Checkbox checked   Rule 13d-1(d)






    SCHEDULE 13G

    CUSIP No.
    G79483106


    1Names of Reporting Persons

    WISeKey International Holding AG
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    SWITZERLAND
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    6,001,200.00
    6Shared Voting Power

    0.00
    7Sole Dispositive Power

    6,001,200.00
    8Shared Dispositive Power

    0.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    6,001,200.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    4.85 %
    12Type of Reporting Person (See Instructions)

    CO


    SCHEDULE 13G

    Item 1. 
    (a)Name of issuer:

    SEALSQ Corp
    (b)Address of issuer's principal executive offices:

    Avenue Louis-Casai 58, 1216 Cointrin, Switzerland
    Item 2. 
    (a)Name of person filing:

    This statement is filed on behalf of WISeKey International Holding AG (the "Reporting Person").
    (b)Address or principal business office or, if none, residence:

    The address for the Reporting Person is: General-Guisan-Strasse 6 CH-6300 Zug, Switzerland
    (c)Citizenship:

    The Reporting Person is a Swiss stock corporation.
    (d)Title of class of securities:

    Ordinary Shares, par value $0.01 per share
    (e)CUSIP No.:

    G79483106
    Item 3.If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
    (a)Checkbox not checked   Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
    (b)Checkbox not checked   Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
    (c)Checkbox not checked   Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
    (d)Checkbox not checked   Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
    (e)Checkbox not checked   An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
    (f)Checkbox not checked   An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
    (g)Checkbox not checked   A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
    (h)Checkbox not checked   A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
    (i)Checkbox not checked   A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
    (j)Checkbox not checked   A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
           please specify the type of institution:
    (k)Checkbox not checked   Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
     
    Item 4.Ownership
    (a)Amount beneficially owned:

    See Row 9 of cover page. Please note that the Reporting Person also owns 1,499,700 Class F Shares of SEALSQ Corp that, together with the beneficial ownership of Ordinary Shares as described in Row 9, represents 52.41% of the voting power for SEALSQ Corp.
    (b)Percent of class:

    See Row 11 of cover page. All ownership percentages of SEALSQ Corp Ordinary Shares that are calculated in this Schedule 13G are based upon an aggregate of 123,731,729 Ordinary Shares outstanding on June 30, 2025.
    (c)Number of shares as to which the person has:
     (i) Sole power to vote or to direct the vote:

    See Row 5 of cover page.

     (ii) Shared power to vote or to direct the vote:

    See Row 6 of cover page.

     (iii) Sole power to dispose or to direct the disposition of:

    See Row 7 of cover page.

     (iv) Shared power to dispose or to direct the disposition of:

    See Row 7 of cover page.

    Item 5.Ownership of 5 Percent or Less of a Class.
     
    Checkbox checked    Ownership of 5 percent or less of a class
    Item 6.Ownership of more than 5 Percent on Behalf of Another Person.
     
    Not Applicable
    Item 7.Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
     
    Not Applicable
    Item 8.Identification and Classification of Members of the Group.
     
    Not Applicable
    Item 9.Notice of Dissolution of Group.
     
    Not Applicable

    Item 10.Certifications:
     
    Not Applicable

        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.

     
    WISeKey International Holding AG
     
    Signature:/s/ Carlos Moreira
    Name/Title:Carlos Moreira/Chief Executive Officer
    Date:07/29/2025
     
    Signature:/s/ John O'Hara
    Name/Title:John O'Hara/Chief Financial Officer
    Date:07/29/2025
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