T. Rowe Price (OS) files 13G/A reporting 111 shares; 0.0% ownership

Rhea-AI Filing Summary

T. Rowe Price Investment Management, Inc. filed an amendment on Schedule 13G/A reporting beneficial ownership of 111 shares of common stock of INC (CUSIP 68278B107), representing 0.0% of the class. The filing states the holder owns sole voting and dispositive power over 111 shares and includes a formal denial of beneficial ownership. The filing is signed by Ellen York, Vice President, on 05/15/2026.

Insights

Institutional Ownership Analyst

Small reported holding by an institutional manager; appears administrative.

The amendment lists 111 shares and 0.0% ownership, indicating a de minimis position in INC. The submission includes a formal statement denying beneficial ownership while disclosing voting and dispositive power.

Because the position is under 5 percent, this is routine reporting; subsequent filings would show any material change in stake.

Key Figures

Shares beneficially owned: 111 shares Percent of class: 0.0% CUSIP: 68278B107 +1 more

4 metrics

Shares beneficially owned 111 shares Amount beneficially owned reported on Schedule 13G/A

Percent of class 0.0% Percent of class reported on Schedule 13G/A

CUSIP 68278B107 Identifier for INC common stock as listed in the filing

Signature date 05/15/2026 Date the amendment was signed by Ellen York, Vice President

Key Terms

Schedule 13G/A, Beneficial ownership, CUSIP

3 terms

Schedule 13G/A regulatory

"T. Rowe Price Investment Management, Inc. filed an amendment on Schedule 13G/A"

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.

Beneficial ownership financial

"Amount beneficially owned: 111 (b) Percent of class: 0.0%"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

CUSIP regulatory

"CUSIP No.: 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.

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

T. Rowe Price Investment Management, Inc.

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

MARYLAND

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 111.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 111.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

111.00

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: T. Rowe Price Investment Management, Inc.
(b)	Address or principal business office or, if none, residence: 1307 Point Street, Baltimore, MD 21231
(c)	Citizenship: Maryland
(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: 111
(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: 111
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 111
	(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. T. Rowe Price Investment Management, Inc. hereby declares and affirms that the filing of Schedule 13G shall not be construed as an admission that Price Investment Management is the beneficial owner of the securities referred to, which beneficial ownership is expressly denied.

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.

T. Rowe Price Investment Management, Inc.

Signature:	Ellen York
Name/Title:	Vice President
Date:	05/15/2026

FAQ

What does Schedule 13G/A for OS show about T. Rowe Price's stake?

It reports T. Rowe Price beneficial ownership of 111 shares, equal to 0.0% of the class. The amendment states sole voting and dispositive power over those 111 shares and includes a declaration denying beneficial ownership while making the required disclosure.

Does the Schedule 13G/A mean T. Rowe Price controls INC decisions (OS)?

No definitive control is shown; the filing discloses sole voting and dispositive power for 111 shares. The filing also contains a formal statement denying beneficial ownership, so governance implications are not asserted in this amendment.

When was the Schedule 13G/A for OS signed and by whom?

The amendment is signed by Ellen York, Vice President, on 05/15/2026. That signature line is the execution date provided in the filing and serves as the attestation for the disclosed position.

Is the reported OS ownership material under SEC thresholds?

No; the filing shows 111 shares representing 0.0% of the class, which is below the 5% reporting threshold for material holdings. The Schedule 13G/A classification is consistent with a non‑controlling, small position.