Simon Irish

CIK: 0002091865

Transaction Breakdown

Open Market Buys (P)1 (25.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)2 (50.0%)

Derivative conversions

Awards (A)1 (25.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

IMSR

Terrestrial Energy Inc. /DE/

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (4 total)

IMSR
Terrestrial Energy Inc. /DE/
Oct 28, 2026
Exercise(M)
Direct
55.4K shares-
IMSR
Terrestrial Energy Inc. /DE/
Oct 21, 2026
Exercise(M)
Direct
511.6K shares-
IMSR
Terrestrial Energy Inc. /DE/
Oct 13, 2026
Purchase(P)
Direct
16.9K shares at avg. $3.01$51K
IMSR
Terrestrial Energy Inc. /DE/
Oct 28, 2025
Award(A)
Restricted Stock Units
Direct
166.3K shares-

		Type	Shares	Price		Ownership
Oct 28, 2026	IMSR Terrestrial Energy Inc. /DE/	Exercise(M)	55,432	-	$0	Direct
Oct 21, 2026	IMSR Terrestrial Energy Inc. /DE/	Exercise(M)	511,580	-	$0	Direct
Oct 13, 2026	IMSR Terrestrial Energy Inc. /DE/	Purchase(P)	16,900	$3.01	$50,818	Direct
Oct 28, 2025	IMSR Terrestrial Energy Inc. /DE/	Award(A) Restricted Stock Units	166,298	-	-	Direct

1-4 of 4 transactions

About Irish Simon

Irish Simon (SEC CIK 0002091865) files insider reports with the SEC as Chief Executive Officer of Terrestrial Energy Inc. /DE/ (IMSR).

Signal8 holds 5 ownership filings by Irish Simon (1 Form 3, 4 Form 4), filed between Oct 30, 2025 and Oct 30, 2026. Those filings report 4 transactions, from Oct 28, 2025 to Oct 28, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Irish Simon's filings is in CHARLOTTE, NC.

Recent filings by Irish Simon

Oct 28, 2026: Option exercise of IMSR shares (Form 4, code M).
Oct 21, 2026: Option exercise of IMSR shares (Form 4, code M).
Oct 13, 2026: Open-market purchase of IMSR shares (Form 4, code P).
Oct 28, 2025: Grant or award of IMSR derivative securities (Form 4, code A).

Other insiders filing for Terrestrial Energy Inc. /DE/ (IMSR)

Williams David Woodward, Chief Commercial Officer
Pardee Charles G, Director
BUCKMAN FREDERICK W, Director
McCarthy Kathryn Ann, Director
Millsap Steven M., General Counsel
Thrasher Brian Patrick, Chief Financial Officer

How to read Form 4 transaction codes