IMSR · ISSUER CIK 2019804
Terrestrial Energy Inc. /DE/
Between Aug 1, 2026 and Oct 29, 2026, 3 Terrestrial Energy Inc. /DE/ insiders reported $112K of open-market purchases and $0.00 of sales on SEC Form 4. The largest buyer was Irish Simon (Chief Executive Officer, Director), with $51K.
↗3 insiders filed
Original Form 4 filings from Aug 1, 2026 to Oct 29, 2026. No open-market sales in the window.
$112KInsider buying
$0.00Insider selling
+$112KNet open-market
Oct 26, 2026Latest filing
| Ticker | Insider | Type | Owned | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 26, 202618:30 | Oct 21, 2026 | IMSR | Chief Executive Officer, Director | M · ExerciseLate 5d | — | +511,580 | 2,824,414 | +22% | — | ||
| Oct 15, 202617:42 | Oct 14, 2026 | IMSR | Director | P · Buy | $2.95 | +7,500 | 14,258 | +111% | +$22K | -51.3% | +17.1% |
| Oct 14, 202609:15 | Oct 13, 2026 | IMSR | Chief Executive Officer, Director | P · Buy | $3.01 | +16,900 | 2,312,834 | +1% | +$51K | -50.4% | +14.9% |
| Oct 13, 202611:06 | Oct 9, 2026 | IMSR | Director | P · Buy | $3.28 | +12,000 | 18,669 | +180% | +$39K | -45.9% | +5.4% |