Terrestrial Energy: CEO Simon Irish exercised 511,580 shares

What happened Simon Irish, CEO, exercised or converted a derivative on Oct 21, 2026. The filing reports 511,580 shares acquired at $0.00 (code M) and 511,580 shares disposed at $0.00 (code M, derivative).

Key details

• Transaction date: Oct 21, 2026. Filing date (accession): Oct 26, 2026.
• Transaction code and price: M (exercise or conversion of derivative); $0.00 per share.
• Shares reported acquired: 511,580. Shares reported disposed: 511,580. Total value reported: $0.00.
• Shares owned after the transaction: not reported in the provided filing.
• Relevant footnotes from the filing: F1 — represents shares subject to vested portion of restricted stock unit award; F2 — each restricted stock unit represents a contingent right to receive one share of common stock; F3 — the restricted stock units vest in one-half increments on each of the first and second anniversaries of the grant date, subject to continued employment through each applicable vesting date and accelerated vesting in certain events.
• Filing timeliness: timeliness code not indicated in the provided information.

Why it may matter

• The filing reports exercise/conversion of a derivative and a matching disposition for the same number of shares; the filing does not state whether this was a cashless exercise or involved another arrangement.
  A filing does not show why the insider traded or why the company acted.