SEC Form 4 · accession 0001193125-26-328808
Terrestrial Energy Inc. /DE/ · IMSR
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Pamela Beth Cowan
Officer — EVP, Engineering
Period of report
Jul 29, 2026
Accepted (ET)
Jul 31, 2026 · 5:00 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0002019804
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F1 | $5.01 | Jul 29, 2026 | A | 299,401 | A | Jul 29, 2027 | Jul 29, 2036 | Common Stock | 299,401 | 299,401 | D |
Explanation of responses
- F1Consists of options granted pursuant to the Terrestrial Energy Inc. 2025 Equity Incentive Plan. The options vest in one-third increments on each of the first, second and third anniversaries of the grant date, subject to the reporting person's continued service through each applicable vesting date.