WILLIAM D. JOHNSON - 28 Oct 2025 Form 3 Insider Report for Terrestrial Energy Inc. /DE/ (HOND)

Role
Director
Signature
/s/ Steven M. Millsap, pursuant to Power of Attorney
Issuer symbol
HOND
Transactions as of
28 Oct 2025
Net transactions value
$0
Form type
3
Filing time
07 Nov 2025, 18:45:21 UTC
Previous filing
14 May 2025
Next filing
09 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
JOHNSON WILLIAM D Director 2730 W. TYVOLA ROAD, SUITE 100, CHARLOTTE /s/ Steven M. Millsap, pursuant to Power of Attorney 07 Nov 2025 0001183048

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

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 134,109 $2.24 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Consists of options granted pursuant to the Terrestrial Energy Inc. Second Amended and Restated 2024 Stock Option 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.

Remarks:

Exhibit List - Exhibit 24.1 - Power of Attorney