OneStream amendment lists 0 shares beneficially owned

OneStream Inc amendment (Schedule 13G/A) states that Kayne Anderson Rudnick Investment Management, LLC reports 0 shares of Common Stock (CUSIP 68278B107) and 0.0% ownership as of the filing.

Rhea-AI Filing Summary

OneStream Inc amendment (Schedule 13G/A) states that Kayne Anderson Rudnick Investment Management, LLC reports 0 shares of Common Stock (CUSIP 68278B107) and 0.0% ownership as of the filing. The amendment is signed by the firm's Chief Compliance Officer on 05/14/2026.

Key Figures

Form type: Schedule 13G/A Beneficially owned: 0 shares Percent of class: 0.0% +2 more

5 metrics

Form type Schedule 13G/A Amendment No. 4

Beneficially owned 0 shares Common Stock (CUSIP 68278B107)

Percent of class 0.0% Common Stock ownership percentage

Reporting period 03/31/2026 Date shown near cover information

Signature date 05/14/2026 Signed by Chief Compliance Officer Michael Shoemaker

Key Terms

Schedule 13G/A, Beneficially owned, CUSIP

3 terms

Schedule 13G/A regulatory

"Item 1. (a) Name of issuer: OneStream Inc"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficially owned financial

"Item 4. Amount beneficially owned: 0"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

CUSIP technical

"Title of class of securities: Common Stock (CUSIP 68278B107)"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the OneStream (OS) Schedule 13G/A amendment report?

The amendment reports that Kayne Anderson Rudnick Investment Management, LLC beneficially owns 0 shares of OneStream Common Stock and holds 0.0% of the class. The filing identifies the security by CUSIP 68278B107 and is signed on 05/14/2026.

Who filed the Schedule 13G/A for OneStream (OS)?

The filing was submitted by Kayne Anderson Rudnick Investment Management, LLC with its address listed as 2000 Avenue of the Stars, Suite 1110, Los Angeles, CA. The signatory is Michael Shoemaker, Chief Compliance Officer, signing on 05/14/2026.

Does the amendment show any voting or dispositive power for OS shares?

No. The amendment shows 0 shares for each category: sole voting power, shared voting power, sole dispositive power, and shared dispositive power. The filing explicitly lists zeros for the power fields and states ownership is "5 percent or less of a class."

What class of securities is covered in the OneStream (OS) filing?

The Schedule 13G/A covers OneStream Common Stock, identified by CUSIP 68278B107. The filing lists the issuer's principal executive office at 191 N. Chester Street, MI, 48009, and confirms the reporting person's citizenship as California.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/14/2026 - 04:05 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

OneStream Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

68278B107

(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:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 68278B107

1

Names of Reporting Persons

Kayne Anderson Rudnick Investment Management, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

IA

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: Kayne Anderson Rudnick Investment Management, LLC
(b)	Address or principal business office or, if none, residence: Kayne Anderson Rudnick Investment Management, LLC - 2000 Avenue of the Stars, Suite 1110, Los Angeles, CA 90067, US
(c)	Citizenship: Kayne Anderson Rudnick Investment Management, LLC - CALIFORNIA
(d)	Title of class of securities: Common Stock
(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)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	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)	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)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 0
(b)	Percent of class: 0.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	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:

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:	05/14/2026