Quick Takeaways
- KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC filed SCHEDULE 13G/A for OneStream Inc Onestream Ord Shs Class A (OS).
- Disclosed ownership: 7%.
- Date of event: 30 Sep 2025.
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC - 30 Sep 2025 SCHEDULE 13G/A Report for OneStream Inc Onestream Ord Shs Class A (OS)
- Filing Manager
- KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
- Reporting Manager
- Kayne Anderson Rudnick Investment Management, LLC
- Symbol
- OS
- Shares outstanding
- 88,742,571 shares
- Disclosed Ownership
- 6,211,980 shares
- Ownership
- 7%
- Form type
- SCHEDULE 13G/A
- Filing time
- 13 Nov 2025, 16:05:17 UTC
- Date of event
- 30 Sep 2025
- Previous filing
- 14 May 2025
- Next filing
- 13 Feb 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC disclosed 7% ownership in OneStream Inc Onestream Ord Shs Class A (OS) on 30 Sep 2025."
What Changed
- Previous schedule filing date: 14 May 2025.
- Current filing was accepted on 13 Nov 2025, 16:05.
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 (3)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Kayne Anderson Rudnick Investment Management, LLC | 7% | 6,211,980 | 1,860,950 | 4,242,072 | /s/Michael Shoemaker | Chief Compliance Officer | |
| Virtus Investment Advisers, LLC | 4.8% | 4,240,709 | 0 | 4,240,709 | /s/Chetram Persaud | Chief Compliance Officer | |
| Virtus Equity Trust on behalf of Virtus Small-Cap Growth Fund | 4.7% | 4,101,675 | 0 | 4,101,675 | /s/Daphne Chisolm | Vice President, Counsel and Assistant Secretary |