Terrestrial Energy Inc /DE/ (IMSR) insider trading
Every open-market stock purchase and sale by Terrestrial Energy Inc /DE/ executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- Simon Irish (CEO) and 2 others bought $112K in the last 90 days.
Last 12 months: insiders bought $112K (3 buys) and sold $0 (0 sales). Last close $2.86 on Oct 22, 2026.
Recent IMSR insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Oct 19, 2026 | David Woodward Williams (C-suite exec) | Bought (not open market) | — |
| Oct 14, 2026 | Charles G Pardee (Insider) | Bought | $22.1K |
| Oct 13, 2026 | Simon Irish (CEO) | Bought | $50.8K |
| Oct 9, 2026 | Frederick W Buckman (Insider) | Bought | $39.3K |
| Jul 23, 2026 | Kathryn Ann McCarthy (Insider) | Bought (not open market) | — |
| Apr 12, 2026 | David Michael LeBlanc (CTO) | Bought (not open market) | — |
| Apr 12, 2026 | William F. Smith (COO) | Bought (not open market) | — |
| Apr 12, 2026 | Brian Patrick Thrasher (CFO) | Bought (not open market) | — |
| Apr 12, 2026 | Brian Patrick Thrasher (CFO) | Bought (not open market) | — |
| Apr 12, 2026 | Steven M. Millsap (General Counsel) | Bought (not open market) | — |
| Dec 18, 2025 | Shawn Matthews (Director) | Bought (not open market) | — |
| Dec 18, 2025 | Shawn Matthews (Director) | Bought (not open market) | — |
| Dec 18, 2025 | William D Johnson (Director) | Bought (not open market) | — |
| Dec 18, 2025 | William D Johnson (Director) | Bought (not open market) | — |
| Dec 18, 2025 | Robert Wood Jones (Director) | Bought (not open market) | — |
| Dec 18, 2025 | John Hugh MacDiarmid (Director) | Bought (not open market) | — |
| Dec 18, 2025 | Frederick W Buckman (Director) | Bought (not open market) | — |
| Dec 18, 2025 | David John Hill (Director) | Bought (not open market) | — |
| Dec 18, 2025 | David John Hill (Director) | Bought (not open market) | — |
| Dec 18, 2025 | Robert Wood Jones (Director) | Bought (not open market) | — |
| Dec 18, 2025 | Charles G Pardee (Director) | Bought (not open market) | — |
| Dec 18, 2025 | Charles G Pardee (Director) | Bought (not open market) | — |
| Dec 18, 2025 | William D Johnson (Director) | Bought (not open market) | — |
| Dec 18, 2025 | John Hugh MacDiarmid (Director) | Bought (not open market) | — |
| Dec 18, 2025 | Frederick W Buckman (Director) | Bought (not open market) | — |
Who's trading IMSR
- David Woodward Williams, C-suite exec: other filings, last Oct 19, 2026
- Charles G Pardee, Director: bought $22.1K (1 buy), last Oct 14, 2026
- Simon Irish, CEO: bought $50.8K (1 buy), last Oct 13, 2026
- Frederick W Buckman, Director: bought $39.3K (1 buy), last Oct 9, 2026
- Kathryn Ann McCarthy, Insider: other filings, last Jul 23, 2026
- David Michael LeBlanc, CTO: other filings, last Apr 12, 2026
- Brian Patrick Thrasher, CFO: other filings, last Apr 12, 2026
- Steven M. Millsap, General Counsel: other filings, last Apr 12, 2026
- William F. Smith, COO: other filings, last Apr 12, 2026
- David John Hill, Director: other filings, last Dec 18, 2025
- William D Johnson, Director: other filings, last Dec 18, 2025
- Robert Wood Jones, Director: other filings, last Dec 18, 2025
- John Hugh MacDiarmid, Director: other filings, last Dec 18, 2025
- Shawn Matthews, Director: other filings, last Dec 18, 2025
- Michael J Connor, Insider: other filings, last Oct 28, 2025
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