Terrestrial Energy EVP Pamela Cowan Receives 299,401-Option Award

What Happened

• Pamela Beth Cowan, EVP, Engineering at Terrestrial Energy Inc. (IMSR), was granted 299,401 derivative securities (stock options) on July 29, 2026. The Form 4 reports an acquisition price of $0.00 for the award (derivative grant); the filing does not state a cash payment or a per-share strike price.

Key Details

• Transaction date: 2026-07-29; Form 4 filed: 2026-07-31 (appears timely within the usual two-business-day window).
• Reported acquisition: 299,401 options; acquisition price shown as $0.00 (derivative).
• Shares owned after transaction: not disclosed in the provided filing.
• Footnote: Options were granted under the Terrestrial Energy Inc. 2025 Equity Incentive Plan and vest in one-third increments on each of the first, second and third anniversaries of the grant date, subject to continued service.

Context

• This was an option award (compensation), not an open-market purchase or a sale. The options vest over three years and were not exercised or sold at the time of the filing. Such grants are common as part of executive compensation and do not by themselves indicate a buy-or-sell signal from the insider.