Key facts
- AVENIR CORP filed SCHEDULE 13G/A for Cytosorbents Corp Common Stock (CTSO).
- Disclosed ownership: 8.3%.
- Date of event: 31 Dec 2025.
AVENIR CORP - 31 Dec 2025 SCHEDULE 13G/A Report for Cytosorbents Corp Common Stock (CTSO)
- Filing Manager
- AVENIR CORP
- Reporting Manager
- AVENIR CORP
- Security
- Cytosorbents Corp Common Stock
- Symbol
- CTSO
- Shares outstanding
- 63,013,241 shares
- Disclosed Ownership
- 5,230,099 shares
- Ownership
- 8.3%
- Form type
- SCHEDULE 13G/A
- Filing time
- 13 Feb 2026, 17:56:29 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 14 Feb 2025
- SEC
- View on sec.gov
Key filing fact
AVENIR CORP disclosed 8.3% ownership in Cytosorbents Corp Common Stock (CTSO) on 31 Dec 2025.
Change
- Previous schedule filing date: 14 Feb 2025.
- Current filing was accepted on 13 Feb 2026, 17:56.
Research use
- 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.
Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Reporting managers (2)
Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| AVENIR CORP | 8.3% | 5,230,099 | 5,230,099 | James H. Rooney | President | ||
| James H. Rooney | 8.3% | 5,230,099 | James H. Rooney | President |
CIK / CUSIP context first