Form4insider filings, from the source

Company · CIK 0002019804 · SIC 3443 — Fabricated Plate Work (Boiler Shops) · Nasdaq

Terrestrial Energy Inc. /DE/ · IMSR

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported at this company — common stock

No reported common-stock activity in this period.

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jul 29, 2026 AForm 4 →Jul 31, 5:00 pm EDTPamela Beth CowanEVP, Engineering299,401——299,401—
Jul 23, 2026 AForm 4 →Jul 27, 5:00 pm EDTKathryn Ann McCarthyDirector2,049——2,049—