# EDGAR Filing Document

**Accession Number:** 0001889956
**File Stem:** 0001193125-26-151965
**Filing Date:** 2026-4
**Character Count:** 3571
**Document Hash:** fb54026f3a3848770d52eed409414f15
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-151965.hdr.sgml**: 20260413

**ACCESSION NUMBER**: 0001193125-26-151965

**CONFORMED SUBMISSION TYPE**: 15-12G

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260413

**DATE AS OF CHANGE**: 20260413

**EFFECTIVENESS DATE**: 20260413

**FILER**: 

**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

**FILING VALUES:**
- **FORM TYPE:** 15-12G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42187
- **FILM NUMBER:** 26856430

**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 15** 

**CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION** 

**UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934** 

**OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d)** 

**OF THE SECURITIES EXCHANGE ACT OF 1934.** 

**Commission File Number 001-42187** 

## OneStream, Inc.
**(Exact name of registrant as specified in its charter)** 

**191 N. Chester Street** 

**Birmingham, Michigan 48009** 

**(248) 650-1490** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

**Class A common stock, par value $0.0001 per share** 

**(Title of each class of securities covered by this Form)** 

**None** 

**(Titles of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains)** 

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

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| | |
|:---|:---|
|  Rule 12g-4(a)(1) | ☒ |
|  Rule 12g-4(a)(2) | ☐ |
|  Rule 12h-3(b)(1)(i) | ☒ |
|  Rule 12h-3(b)(1)(ii) | ☐ |
|  Rule 15d-6 | ☐ |
|  Rule 15d-22(b) | ☐ |

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Approximate number of holders of record as of the certification or notice date: One (1)\*

\* On April 1, 2026, pursuant to the terms of that certain Agreement and Plan of Merger, dated January 6, 2026, by and among Onward AcquireCo, Inc., a Delaware corporation ("Parent"), Onward Merger Sub 2, LLC, a Delaware limited liability company and a wholly owned subsidiary of Parent ("Merger Sub I"), Onward Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub II"), OneStream, Inc., a Delaware corporation ("OneStream"), and OneStream Software LLC, a Delaware limited liability company and a subsidiary of OneStream ("OneStream LLC"), (i) Merger Sub I merged with and into OneStream LLC (the "LLC Merger"), with OneStream LLC surviving the LLC Merger as a subsidiary of Parent and (ii) Merger Sub II merged with and into OneStream (the "Company Merger"), with OneStream surviving the Company Merger as a subsidiary of Parent. 

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**SIGNATURE** 

Pursuant to the requirements of the Securities Exchange Act of 1934, OneStream, Inc. has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

Date: April 13, 2026

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| | |
|:---|:---|
| **OneStream, Inc.** | **OneStream, Inc.** |
| By: | /s/ Thomas Shea |
| Name: | Thomas Shea |
| Title: | Authorized Signatory |

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