Frederick W. Buckman

CIK: 0001144845

Transaction Breakdown

Open Market Buys (P)1 (33.3%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (66.7%)

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/

Director

Discretionary Trading P&L

Holdings

Transaction History (3 total)

IMSR
Terrestrial Energy Inc. /DE/
Oct 9, 2026
Purchase(P)
Direct
12K shares at avg. $3.28$39K
IMSR
Terrestrial Energy Inc. /DE/
Dec 18, 2025
Award(A)
Restricted Stock Units
Direct
6.7K shares-
IMSR
Terrestrial Energy Inc. /DE/
Dec 18, 2025
Award(A)
Resricted Stock Units
Direct
1.2K shares-

		Type	Shares	Price		Ownership
Oct 9, 2026	IMSR Terrestrial Energy Inc. /DE/	Purchase(P)	12,000	$3.28	$39,336	Direct
Dec 18, 2025	IMSR Terrestrial Energy Inc. /DE/	Award(A) Restricted Stock Units	6,703	-	-	Direct
Dec 18, 2025	IMSR Terrestrial Energy Inc. /DE/	Award(A) Resricted Stock Units	1,176	-	-	Direct

1-3 of 3 transactions

About BUCKMAN FREDERICK W

BUCKMAN FREDERICK W (SEC CIK 0001144845) files insider reports with the SEC as Director of Terrestrial Energy Inc. /DE/ (IMSR).

Signal8 holds 3 ownership filings by BUCKMAN FREDERICK W (1 Form 3, 2 Form 4), filed between Nov 7, 2025 and Oct 13, 2026. Those filings report 3 transactions, from Dec 18, 2025 to Oct 9, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on BUCKMAN FREDERICK W's filings is in CHARLOTTE, NC.

Recent filings by BUCKMAN FREDERICK W

Oct 9, 2026: Open-market purchase of IMSR shares (Form 4, code P).
Dec 18, 2025: Grants or awards of IMSR derivative securities (2 lines, Form 4, code A).

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

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

How to read Form 4 transaction codes