Transaction · 0001193125-26-432264

Irish Simon

Irish Simon, CEO, reported a transaction classified as exercise at Terrestrial Energy Inc. DE involving 511580.000000 shares for an estimated $0.00. Reported holdings after the transaction were 511580.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

exerciseSEC transaction code MCEO
IMSRTerrestrial Energy Inc. DE
Trade date
Oct 21, 2026
Filing date
Oct 26, 2026
View on SEC Insider profile
Disclosed value$0Shares × reported price
Shares traded511k$0.00 per share
Holdings after511kDirect
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

Not calculated for derivative securities.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

IMSR price since this filing

Daily closing prices, with the filing date and available return windows
IMSR · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago1w ago +0.0%1d ago -4.8%
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Derivative
Type
exercise
Code M
Identifier
0001193125-26-432264
Restricted Stock Units
Transaction date
Oct 21, 2026
Filed Oct 26, 2026, 10:30 PM · 5d delay
Shares
511,580 sh
$0.00 per share
Estimated value
$0
Computed from shares × price
Holdings after
511,580 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Derivative Transaction Direct Ownership Large Holdings Reduction
Filing-only score

-10 points

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • derivative_transaction-16 points

    is_derivative = true

    Derivative exercise rows are less discretionary than open-market purchases.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Executive Officer

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Represents shares of common stock subject to vested portion of restricted stock unit award.

  2. F2

    Each restricted stock unit represents a contingent right to receive one share of common stock.

  3. F3

    The restricted stock units vest in one-half increments on each of the first and second anniversaries of the grant date, subject to Mr. Irish's continued employment through each applicable vesting date…

Original filing · 0001193125-26-432264
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