| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| LeBlanc David Michael | Chief Technology Officer, Director | 2730 W. TYVOLA ROAD, SUITE 100, CHARLOTTE | /s/ Steven M. Millsap, pursuant to Power of Attorney | 07 Nov 2025 | 0002092979 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | IMSR | Common Stock, par value $0.0001 per share ("Common Stock") | 5,981 | 28 Oct 2025 | Direct | F1 | |||||
| holding | IMSR | Common Stock | 13,731 | 28 Oct 2025 | Through Entity | F1 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | IMSR | Stock Option (Right to Buy) | 28 Oct 2025 | Common Stock | 17,792 | $2.01 | Direct | F2 | ||||||
| holding | IMSR | Stock Option (Right to Buy) | 28 Oct 2025 | Common Stock | 53,197 | $2.24 | Direct | F2 | ||||||
| holding | IMSR | Stock Option (Right to Buy) | 28 Oct 2025 | Common Stock | 63,836 | $2.24 | Direct | F2 | ||||||
| holding | IMSR | Stock Option (Right to Buy) | 28 Oct 2025 | Common Stock | 10,640 | $2.24 | Direct | F2 | ||||||
| holding | IMSR | Exchangeable Shares | 28 Oct 2025 | Common Stock | 11,175,778 | Direct | F3 | |||||||
| holding | IMSR | Warrants (Right to Buy) | 28 Oct 2025 | Common Stock | 17,882 | $2.24 | Direct | F4 | ||||||
| holding | IMSR | Warrants (Right to Buy) | 28 Oct 2025 | Common Stock | 41,575 | $2.24 | Through Entity | F4 | ||||||
| holding | IMSR | Contingent Value Right | 28 Oct 2025 | Common Stock | Direct | F5 | ||||||||
| holding | IMSR | Contingent Value Right | 28 Oct 2025 | Common Stock | Through Entity | F5 |
| Id | Content |
|---|---|
| F1 | Upon closing of the business combination (the "Business Combination") between Terrestrial Energy Inc., a Delaware corporation formerly known as HCM II Acquisition Corp. ("New Terrestrial"), and Terrestrial Energy Development Inc., a Delaware corporation formerly known as Terrestrial Energy Inc. ("Legacy Terrestrial"), the reporting person acquired these securities in exchange for the reporting person's securities in Legacy Terrestrial pursuant to the terms and conditions of the Business Combination Agreement, dated as of March 26, 2025, by and among HCM II Acquisition Corp., HCM II Merger Sub Inc. and Legacy Terrestrial. |
| F2 | Consists of options granted pursuant to the Legacy Terrestrial Second Amended and Restated 2024 Stock Option Plan. The options are currently exercisable. |
| F3 | Represents exchangeable shares in the capital of Terrestrial Energy Canada (Exchange) Inc., an indirect wholly-owned subsidiary of New Terrestrial, which are exchangeable for Common Stock of New Terrestrial, subject to adjustment. The exchangeable shares have no expiration date. |
| F4 | Consists of Legacy Terrestrial warrants to purchase common stock that are currently exercisable. |
| F5 | Consists of contingent value right issued upon conversion of Legacy Terrestrial convertible notes in connection with the Business Combination. Each contingent value right entitles the holder to receive additional shares of Common Stock in the event that the volume weighed average price of the Common Stock for the twenty (20) trading days beginning on the trading day immediately following expiration of the lock-up period contemplated by the applicable Legacy Terrestrial convertible note is less than seventy-five percent (75%) of the redemption price ($7.905). |
Exhibit List - Exhibit 24.1 - Power of Attorney