🕵️ Terrestrial Energy Inc. /DE/ ($IMSRW)
SEC insider & ownership activity, last 12 months · CIK 2019804 · 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 | |
|---|---|---|---|---|---|
| Roberto Marco Sella | 14.3% | 13G | Jan 22, 2026 | filing ↗ | |
| Simon Irish | 12.8% | 13D | Oct 28, 2025 | filing ↗ | |
| David Leblanc | 9.7% | 13D | Oct 28, 2025 | filing ↗ | |
| Barclays PLC | 6.2% | 13G | Mar 21, 2025 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jul 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 21, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jul 14, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 11, 2026 | filing ↗ |
| Earnings (2.02) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 16, 2026 | filing ↗ |
| Earnings (2.02) | Mar 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 30, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 29, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 29, 2026 | filing ↗ |
| Auditor change (4.01) | Nov 21, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 21, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 28, 2025 | filing ↗ |
| Acquisition or disposition (2.01) | Oct 28, 2025 | filing ↗ |
| Unregistered equity sale (3.02) | Oct 28, 2025 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Oct 28, 2025 | filing ↗ |
| Change of control (5.01) | Oct 28, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 28, 2025 | filing ↗ |
| Charter/bylaw changes (5.03) | Oct 28, 2025 | filing ↗ |
| Amendments to the Registrant's Code of Ethics (5.05) | Oct 28, 2025 | filing ↗ |
| Change in Shell Company Status (5.06) | Oct 28, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 28, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 28, 2025 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Oct 23, 2025 | filing ↗ |