🕵️ Aptose Biosciences Inc. ($APTOF)
SEC insider & ownership activity, last 12 months · CIK 882361 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. 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 | |
|---|---|---|---|---|---|
| Hanmi Pharmaceutical Co., Ltd. | 19.9% | 13D | Mar 18, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Acquisition or disposition (2.01) | Jun 30, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Jun 30, 2026 | filing ↗ |
| Change of control (5.01) | Jun 30, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 30, 2026 | filing ↗ |
| Other events (8.01) | Jun 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 30, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 30, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 15, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 29, 2026 | filing ↗ |
| Earnings (2.02) | May 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 13, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Shareholder vote (5.07) | Mar 31, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 31, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 19, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 12, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 12, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 23, 2026 | filing ↗ |
| New financial obligation (2.03) | Feb 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 23, 2026 | filing ↗ |