# EDGAR Filing Document

**Accession Number:** 0002027929
**File Stem:** 0001415889-25-016983
**Filing Date:** 2025-6
**Character Count:** 8455
**Document Hash:** 6909a9f46f424c4b5adc4270dd7bd6bc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001415889-25-016983.hdr.sgml**: 20250612

**ACCESSION NUMBER**: 0001415889-25-016983

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250610

**FILED AS OF DATE**: 20250612

**DATE AS OF CHANGE**: 20250612

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Shea Thomas Anthony
- **CENTRAL INDEX KEY:** 0002027929

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42187
- **FILM NUMBER:** 251043637

**MAIL ADDRESS:**
- **STREET 1:** C/O ONESTREAM, INC.
- **STREET 2:** 362 SOUTH STREET
- **CITY:** ROCHESTER
- **STATE:** MI
- **ZIP:** 48307
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** OneStream, Inc.
- **CENTRAL INDEX KEY:** 0001889956
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 873199478
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 191 N. CHESTER STREET
- **CITY:** BIRMINGHAM
- **STATE:** MI
- **ZIP:** 48009
- **BUSINESS PHONE:** (248) 650-1490

**MAIL ADDRESS:**
- **STREET 1:** 191 N. CHESTER STREET
- **CITY:** BIRMINGHAM
- **STATE:** MI
- **ZIP:** 48009

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Shea Thomas Anthony<br><sub>(Last) (First) (Middle)</sub><br>C/O ONESTREAM, INC.<br>191 N. CHESTER STREET<br><sub>(Street)</sub><br>BIRMINGHAM, MI 48009<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-06-10 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_CEO and President_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>OneStream, Inc. [ OS ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A Common Stock | 2025-06-10 |  | C<sup>(1)</sup> |  | 150 | A | <sup>(1)</sup> | 506767<sup>(2)</sup> | D |  |
| Class A Common Stock | 2025-06-11 |  | S<sup>(3)</sup> |  | 9913 | D | $28.23 | 496854<sup>(2)</sup> | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class D Common Stock | $0 | 2025-06-10 |  | C<sup>(1)</sup> |  |  | 150 | <sup>(4)</sup> | <sup>(4)</sup> | Class A Common Stock | 150 | $0 | 3894049<sup>(5)</sup> | D |  |
| Class D Common Stock | $0 |  |  |  |  |  |  | <sup>(4)</sup> | <sup>(4)</sup> | Class A Common Stock | 4750002 |  | 4750002<sup>(5)</sup> | I | See footnote<sup>(6)</sup> |
| Class D Common Stock | $0 |  |  |  |  |  |  | <sup>(4)</sup> | <sup>(4)</sup> | Class A Common Stock | 7525803 |  | 7525803 | I | See footnote<sup>(7)</sup> |

---

### Footnotes:

(1) The Class A Common Stock was acquired upon the conversion, at the holder's election, of Class D Common Stock held by the holder on a 1:1 basis.

(2) The shares reported include unvested restricted stock units.

(3) Represents the number of shares required to be sold to cover the statutory tax withholding obligations in connection with the vesting of restricted stock units. This sale is mandated by the Issuer's election under its equity incentive plan to require the satisfaction of statutory tax withholding obligations in connection with the vesting of restricted stock units to be funded by a "sell to cover" transaction and does not represent a discretionary sale by the Reporting Person.

(4) The Class D Common Stock is convertible at any time, at the holder's election, into Class A Common Stock on a 1:1 basis. Each outstanding share of Class D Common Stock will automatically convert into one share of Class A Common Stock upon the earlier of (i) any transfer, whether or not for value, except for certain transfers exempted by the Issuer's amended and restated certificate of incorporation, (ii) death or incapacity (if the holder is a natural person), provided that, with respect to the Reporting Person and his permitted transferees, conversion would be deferred for nine months following any such event, and (iii) the first trading day following the seventh anniversary of the Issuer's initial public offering.

(5) On February 25, 2025, 340,736 shares of the Issuer's Class D Common Stock  registered in the name of The Thomas A. Shea 2020 Annuity Trust dated December 23, 2020 (the "2020 Shea Annuity Trust") were transferred to the Reporting Person.

(6) Shares held of record by the 2020 Shea Annuity Trust. The Reporting Person's spouse serves as the trustee for the 2020 Shea Annuity Trust. By virtue of his relationship, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the 2020 Shea Annuity Trust.

(7) Shares held of record by the Shea Family Trust dated December 25, 2019 (the "2019 Shea Family Trust"). The Reporting Person's spouse serves as the co-trustee for the 2019 Shea Family Trust. By virtue of his relationship, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the 2019 Shea Family Trust.

**Signature:** /s/ Holly Koczot, attorney-in-fact  
**Date:** 2025-06-12

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**