SEC Form 4 · accession 0001193125-26-318233
Terrestrial Energy Inc. /DE/ · IMSR
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Kathryn Ann McCarthy
Director
Period of report
Jul 23, 2026
Accepted (ET)
Jul 27, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF1,F2 | — | Jul 23, 2026 | A | 2,049 | A | — | — | Common Stock | 2,049 | 2,049 | D |
Explanation of responses
- F1Each restricted stock unit represents a contingent right to acquire one share of Common Stock.
- F2Consists of restricted stock units granted pursuant to the Terrestrial Energy Inc. 2025 Equity Incentive Plan. The restricted stock units vest in full on December 31, 2026, subject to the reporting person's continued service through the vesting date.