Quick Takeaways
- Thomas Anthony Shea filed SCHEDULE 13G/A for ONESTREAM, INC. Class A Common Stock, par value $0.0001 per share (OS).
- Disclosed ownership: 16%.
- Date of event: 31 Dec 2025.
Thomas Anthony Shea - 31 Dec 2025 SCHEDULE 13G/A Report for ONESTREAM, INC. Class A Common Stock, par value $0.0001 per share (OS)
- Filing Manager
- Thomas Anthony Shea
- Reporting Manager
- Thomas Anthony Shea
- Symbol
- OS
- Shares outstanding
- 111,492,387 shares
- Disclosed Ownership
- 18,173,259 shares
- Ownership
- 16%
- Form type
- SCHEDULE 13G/A
- Filing time
- 13 Feb 2026, 18:01:41 UTC
- Date of event
- 31 Dec 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Thomas Anthony Shea disclosed 16% ownership in ONESTREAM, INC. Class A Common Stock, par value $0.0001 per share (OS) on 31 Dec 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 13 Feb 2026, 18:01.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Thomas Anthony Shea | 16% | 18,173,259 | 5,897,454 | 12,275,805 | /s/ Thomas Anthony Shea | Thomas Anthony Shea |