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    Amendment: SEC Form SCHEDULE 13G/A filed by OneStream Inc.

    11/13/25 4:05:17 PM ET
    $OS
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    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13G


    UNDER THE SECURITIES EXCHANGE ACT OF 1934
    (Amendment No. 2)


    OneStream Inc

    (Name of Issuer)


    Onestream Ord Shs Class A

    (Title of Class of Securities)


    68278B107

    (CUSIP Number)


    09/30/2025

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






    SCHEDULE 13G

    CUSIP No.
    68278B107


    1Names of Reporting Persons

    Kayne Anderson Rudnick Investment Management, 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

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

    1,860,950.00
    6Shared Voting Power

    4,242,072.00
    7Sole Dispositive Power

    1,969,908.00
    8Shared Dispositive Power

    4,242,072.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    6,211,980.00
    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)

    7.0 %
    12Type of Reporting Person (See Instructions)

    IA


    SCHEDULE 13G

    CUSIP No.
    68278B107


    1Names of Reporting Persons

    Virtus Investment Advisers, 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

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

    0.00
    6Shared Voting Power

    4,240,709.00
    7Sole Dispositive Power

    0.00
    8Shared Dispositive Power

    4,240,709.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    4,240,709.00
    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)

    4.8 %
    12Type of Reporting Person (See Instructions)

    IA

    Comment for Type of Reporting Person:  The amounts reported on this page are also included in the amounts reported by Kayne Anderson Rudnick Investment Management, LLC on this Schedule 13G.


    SCHEDULE 13G

    CUSIP No.
    68278B107


    1Names of Reporting Persons

    Virtus Equity Trust on behalf of Virtus Small-Cap Growth Fund
    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

    0.00
    6Shared Voting Power

    4,101,675.00
    7Sole Dispositive Power

    0.00
    8Shared Dispositive Power

    4,101,675.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    4,101,675.00
    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)

    4.7 %
    12Type of Reporting Person (See Instructions)

    IV

    Comment for Type of Reporting Person:  The amounts reported on this page are also included in the amounts reported by Virtus Investment Advisers, LLC on this Schedule 13G.


    SCHEDULE 13G

    Item 1. 
    (a)Name of issuer:

    OneStream Inc
    (b)Address of issuer's principal executive offices:

    191 N. CHESTER STREET, BIRMINGHAM, MI, 48009
    Item 2. 
    (a)Name of person filing:

    (1) Kayne Anderson Rudnick Investment Management, LLC (2) Virtus Investment Advisers, LLC (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund
    (b)Address or principal business office or, if none, residence:

    (1) Kayne Anderson Rudnick Investment Management, LLC - 2000 Avenue of the Stars, Suite 1110, Los Angeles, 90067, CA, United States (2) Virtus Investment Advisers, LLC - One Financial Plaza, Hartford, 06103, CT, United States (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund - 101 Munson Street, Greenfield, 01301, MA, United States
    (c)Citizenship:

    (1) Kayne Anderson Rudnick Investment Management, LLC - CALIFORNIA (2) Virtus Investment Advisers, LLC - MASSACHUSETTS (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund- DELAWARE
    (d)Title of class of securities:

    Onestream Ord Shs Class A
    (e)CUSIP No.:

    68278B107
    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 checked   Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
    (e)Checkbox 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:

    (1) Kayne Anderson Rudnick Investment Management, LLC: 6,211,980 (2) Virtus Investment Advisers, LLC: 4,240,709 (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund: 4,101,675
    (b)Percent of class:

    (1) Kayne Anderson Rudnick Investment Management, LLC: 7.0% (2) Virtus Investment Advisers, LLC: 4.8% (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund: 4.7%
    (c)Number of shares as to which the person has:
     (i) Sole power to vote or to direct the vote:

    (1) Kayne Anderson Rudnick Investment Management, LLC: 1,860,950 (2) Virtus Investment Advisers, LLC: 0 (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund: 0

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

    (1) Kayne Anderson Rudnick Investment Management, LLC: 4,242,072 (2) Virtus Investment Advisers, LLC: 4,240,709 (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund: 4,101,675

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

    (1) Kayne Anderson Rudnick Investment Management, LLC: 1,969,908 (2) Virtus Investment Advisers, LLC: 0 (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund: 0

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

    (1) Kayne Anderson Rudnick Investment Management, LLC: 4,242,072 (2) Virtus Investment Advisers, LLC: 4,240,709 (3) Virtus Equity Trust on behalf of Virtus KAR Small-Cap Growth Fund: 4,101,675

    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.
     
    If any other 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, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.


    With respect to securities owned by a registered investment company included in this filing, only the custodian for such investment company, has the right to receive dividends paid with respect to, and proceeds from the sale of, such securities. No other person is known to have such right, except that the shareholders of such investment company participate proportionately in any dividends and distributions so paid.
    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.

     
    Kayne Anderson Rudnick Investment Management, LLC
     
    Signature:/s/Michael Shoemaker
    Name/Title:Chief Compliance Officer
    Date:11/13/2025
     
    Virtus Investment Advisers, LLC
     
    Signature:/s/Chetram Persaud
    Name/Title:Chief Compliance Officer
    Date:11/13/2025
     
    Virtus Equity Trust on behalf of Virtus Small-Cap Growth Fund
     
    Signature:/s/Daphne Chisolm
    Name/Title:Vice President, Counsel and Assistant Secretary
    Date:11/13/2025
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