🕵️ CERO Therapeutics Holdings, Inc. ($CEROW)
SEC insider & ownership activity, last 12 months · CIK 1870404 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. Brian G. Atwood added 6.7% → 9.9%. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Brian G. Atwood | 9.9% | 13D | Mar 31, 2025 | filing ↗ | |
| Atwood-Edminster Trust DTD 4-2-2000 | 9.5% | 13D | Mar 31, 2025 | filing ↗ | |
| Lynne H. Edminster | 9.5% | 13D | Mar 31, 2025 | filing ↗ | |
| Tibbs Isaiah | 8.7% | 13G | Mar 12, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Jul 14, 2026 | filing ↗ |
| New financial obligation (2.03) | Jul 14, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jul 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 14, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 23, 2026 | filing ↗ |
| New financial obligation (2.03) | Jun 23, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Jun 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 23, 2026 | filing ↗ |
| Material agreement (1.01) | May 28, 2026 | filing ↗ |
| New financial obligation (2.03) | May 28, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | May 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 28, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 27, 2026 | filing ↗ |
| New financial obligation (2.03) | Apr 27, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Apr 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 27, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 8, 2026 | filing ↗ |
| New financial obligation (2.03) | Apr 8, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Apr 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 8, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 6, 2026 | filing ↗ |
| New financial obligation (2.03) | Mar 6, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Mar 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 6, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 9, 2026 | filing ↗ |
| New financial obligation (2.03) | Feb 9, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Feb 9, 2026 | filing ↗ |
| Auditor change (4.01) | Feb 9, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 9, 2026 | filing ↗ |