John Hugh MacDiarmid
CIK: 0002092518
Transaction Breakdown
Open Market Buys (P)0 (0.0%)
High conviction signal
Open Market Sales (S)0 (0.0%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)2 (100.0%)
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/
Director
Discretionary Trading P&L
Holdings
About MacDiarmid John Hugh
MacDiarmid John Hugh (SEC CIK 0002092518) files insider reports with the SEC as Director of Terrestrial Energy Inc. /DE/ (IMSR).
Signal8 holds 2 ownership filings by MacDiarmid John Hugh (1 Form 3, 1 Form 4), filed between Nov 7, 2025 and Dec 22, 2025. Those filings report 2 transactions, the latest on Dec 18, 2025. Signal8's Form 4 history starts in Sep 2024.
The business address on MacDiarmid John Hugh's filings is in CHARLOTTE, NC.
Recent filings by MacDiarmid John Hugh
- 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
- BUCKMAN FREDERICK W, Director
- McCarthy Kathryn Ann, Director
- Millsap Steven M., General Counsel