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

    5/15/26 12:30:58 PM ET
    $LAES
    Semiconductors
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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, USD 0.01 par value per share

    (Title of Class of Securities)




    81752W108

    (CUSIP Number)
    03/31/2026

    (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 checked   Rule 13d-1(b)
    Checkbox not checked   Rule 13d-1(c)
    Checkbox not checked   Rule 13d-1(d)




    schemaVersion:


    SCHEDULE 13G

    CUSIP Number(s):
    81752W108


    1Names of Reporting Persons

    Susquehanna Securities, LLC
    2Check the appropriate box if a member of a Group (see instructions)

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

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

    12,134,793.00
    6Shared Voting Power

    12,134,793.00
    7Sole Dispositive Power

    12,134,793.00
    8Shared Dispositive Power

    12,134,793.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    12,134,793.00
    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)

    5.4 %
    12Type of Reporting Person (See Instructions)

    BD, OO


    SCHEDULE 13G

    Item 1. 
    (a)Name of issuer:

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

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

    This statement is filed by Susquehanna Securities, LLC, who is referred to herein as the "Reporting Person" with respect to the Ordinary Shares, USD 0.01 par value per share (the "Shares"), of SEALSQ Corp (the "Company").
    (b)Address or principal business office or, if none, residence:

    The address of the principal business office of the Reporting Person is: 401 E. City Avenue Suite 220 Bala Cynwyd, PA 19004
    (c)Citizenship:

    Citizenship is set forth in Row 4 of the cover page for the Reporting Person and is incorporated herein by reference.
    (d)Title of class of securities:

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

    81752W108
    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 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:

    The information required by this Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference. The number of Shares reported as beneficially owned by the Reporting Person includes options to buy 10,814,300 Shares. The Company's Annual Report on Form 20-F, filed on March 31, 2026, indicates there were 222,773,999 Shares outstanding as of March 27, 2026.
    (b)Percent of class:

    5.4  %
    (c)Number of shares as to which the person has:
     (i) Sole power to vote or to direct the vote:

    The information required by this Item 4(c)(i) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.

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

    The information required by this Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.

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

    The information required by this Item 4(c)(iii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.

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

    The information required by this Item 4(c)(iv) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.

    Item 5.Ownership of 5 Percent or Less of a Class.
     
    Not Applicable
    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:
     
    By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

        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.

     
    Susquehanna Securities, LLC
     
    Signature:/s/ Brian Sopinsky
    Name/Title:Brian Sopinsky, Secretary
    Date:05/13/2026
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