Insider · CIK 0002092518
John Hugh MacDiarmid
Files at IMSR (Terrestrial Energy Inc. /DE/). First filing -, latest -.
John Hugh MacDiarmid files SEC Form 4 as director at IMSR (Terrestrial Energy Inc. /DE/). No open-market trade is on file; the transactions below are grants, exercises and other rows that carry no view on the price.
A track record needs three past buys with six months of prices behind them; John Hugh MacDiarmid has 0, so none is measured yet.
Signals
This insider’s open-market buys and sells, scored.
Transactions
Every row this insider has filed, 2 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Dec 18, 2025 | IMSR Terrestrial Energy Inc. /DE/ | AGrant or award Restricted Stock Unitsderivative | +5,865 | $0.00 | $0 | 5,865 | Dec 22, 2025 |
| Dec 18, 2025 | IMSR Terrestrial Energy Inc. /DE/ | AGrant or award Resricted Stock Unitsderivative | +1,029 | $0.00 | $0 | 6,894 | Dec 22, 2025 |
Questions about John Hugh MacDiarmid
Answered from the filings on this page, as of the latest one.
Is John Hugh MacDiarmid buying or selling?
John Hugh MacDiarmid has no open-market buy or sell on SEC Form 4; the filings on record are grants, exercises and other transactions.
How did John Hugh MacDiarmid's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and John Hugh MacDiarmid has 0.
Where does John Hugh MacDiarmid file Form 4?
John Hugh MacDiarmid has filed Form 4 at IMSR (Terrestrial Energy Inc. /DE/). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.