Terrestrial Energy Inc. /DE/ (IMSR) insider trading
Terrestrial Energy Inc. /DE/ insiders have made 3 open-market purchases worth $112k since Oct 13, 2026, by 3 different insiders. The latest: Charles G. Pardee (Director) bought $22k, filed Oct 15, 2026, scored 52 out of 100. The biggest: $51k by Simon Irish, filed Oct 14, 2026. 2 buys in the last year came within ten days of another insider's: a cluster, one of the stronger patterns in the research.
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Insider purchases
| Filed | Insider | Stake | Score | Bought | 1 week | 1 month |
|---|---|---|---|---|---|---|
| Oct 15 Form 4 (opens sec.gov) |
Charles G. PardeeDirector · 2 insiders buyingDirector · 2 insiders buying · Near 52-week low | +111% stake | 52 | $22k 7,500 at $2.95 |
— | — |
| Oct 14 Form 4 (opens sec.gov) |
Simon IrishCEO · 2 insiders buyingCEO · 2 insiders buying · Near 52-week low | +1% stake | 44 | $51k 16,900 at $3.01 |
+0.0% | waiting |
| Oct 13 Form 4 (opens sec.gov) |
Frederick W. BuckmanDirectorDirector · 2 insiders buying · Near 52-week low | +180% stake | 52 | $39k 12,000 at $3.28 |
−10.0% | waiting |
Track record (hypothetical): a week after the filing, these buys averaged −5.0% (0% up, 2 measured).
Insiders who bought IMSR
- Charles G. Pardee Director
- Simon Irish CEO
- Frederick W. Buckman Director
Questions
Are insiders buying IMSR stock?
Yes. In the last 90 days, 3 open-market purchases were filed, worth $112k.
Who bought IMSR stock most recently?
Charles G. Pardee, Director, bought 7,500 shares for $22k (Form 4 (opens sec.gov), filed Oct 15, 2026).
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Oct 15, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer