Terrestrial Energy Inc. /DE/ (IMSR)
Data as of , from SEC Form 4 filings.
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About Terrestrial Energy Inc. /DE/ (IMSR)
Terrestrial Energy Inc develops Generation IV nuclear power plants based on its proprietary Integral Molten Salt Reactor (IMSR) technology. Its small modular reactor plants are designed to provide low-carbon electricity and high-temperature industrial heat for applications including power generation, petrochemical and chemical processing, and data centers. The company is working with regulators, suppliers, industrial partners, and energy users to develop, license, and commission IMSR plants.
- CHARLOTTE, NC
- 74
- 2025
- XNAS
https://www.terrestrialenergy.comSEC filings for IMSR on EDGAR
IMSR Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 1 | 12,000 | $39K |
| Grant or award | 2 | 301,450 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
IMSR insider transactions (Form 4)
3321 Form 4 filings on record, the earliest from Oct 30, 2025, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Frederick W. Buckman - Director | Open-market purchase | Common Stock | 12,000 | $3.28 | $39K | |
| Pamela Beth Cowan - Officer | Grant or award | Stock Option (Right to Buy) | 299,401 | $0.00 | - | |
| Kathryn Ann McCarthy - Director | Grant or award | Restricted Stock Units | 2,049 | $0.00 | - | |
 Steven M. Millsap - Officer | Grant or award | Restricted Stock Units | 49,917 | $0.00 | - | |
 Brian Patrick Thrasher - Officer | Grant or award | Restricted Stock Units | 49,917 | $0.00 | - | |
| Brian Patrick Thrasher - Officer | Grant or award | Stock Option (Right to Buy) | 58,236 | $0.00 | - | |
| William F. Smith - Officer | Grant or award | Stock Option (Right to Buy) | 32,787 | $0.00 | - | |
| David Michael Leblanc - Officer | Grant or award | Stock Option (Right to Buy) | 32,787 | $0.00 | - | |
| William D. Johnson - Director | Grant or award | Restricted Stock Units | 1,029 | $0.00 | - | |
| Frederick W. Buckman - Director | Grant or award | Restricted Stock Units | 6,703 | $0.00 | - | |
| Frederick W. Buckman - Director | Grant or award | Resricted Stock Units | 1,176 | $0.00 | - | |
| William D. Johnson - Director | Grant or award | Restricted Stock Units | 5,865 | $0.00 | - | |
| William D. Johnson - Director | Grant or award | Resricted Stock Units | 1,720 | $0.00 | - | |
| Robert Wood Jones - Director | Grant or award | Restricted Stock Units | 5,865 | $0.00 | - | |
| Robert Wood Jones - Director | Grant or award | Resricted Stock Units | 1,029 | $0.00 | - | |
| David John Hill - Director | Grant or award | Restricted Stock Units | 3,352 | $0.00 | - | |
| David John Hill - Director | Grant or award | Resricted Stock Units | 588 | $0.00 | - | |
| Charles G. Pardee - Director | Grant or award | Restricted Stock Units | 5,027 | $0.00 | - | |
| Charles G. Pardee - Director | Grant or award | Resricted Stock Units | 882 | $0.00 | - | |
| John Hugh Macdiarmid - Director | Grant or award | Restricted Stock Units | 5,865 | $0.00 | - | |
| John Hugh Macdiarmid - Director | Grant or award | Resricted Stock Units | 1,029 | $0.00 | - | |
| Shawn Matthews - Director | Grant or award | Restricted Stock Units | 4,190 | $0.00 | - | |
| Shawn Matthews - Director | Grant or award | Restricted Stock Units | 735 | $0.00 | - | |
| Shawn Matthews - Director | Other | Warrants | 3,500,000 | - footnote F1 | - | |
| Shawn Matthews - Director | Other | Common Stock, par value $0.0001 per share | 2,920,000 | - footnote F1 | - | |
| ||||||
| Michael J. Connor | Other | Common Stock, par value $0.0001 per share | 25,000 | - footnote F1 | - | |
| ||||||
| Andrew Scott Brenner | Other | Common Stock, par value $0.0001 per share | 25,000 | - footnote F1 | - | |
| ||||||
| Simon Irish - Officer | Grant or award | Restricted Stock Units | 166,298 | $0.00 | - | |
| Jacob Loveless | Other | Common Stock, par value $0.0001 per share | 25,000 | - footnote F1 | - | |
| ||||||
| Shawn Matthews - Director | Other | Common Stock, par value $0.0001 per share | 5,675,000 | - footnote F1 | - | |
| Shawn Matthews - Director | Other | Common Stock, par value $0.0001 per share | 533,514 | - footnote F3 | - | |
| Shawn Matthews - Director | Other | Warrants | 4,275,000 | $11.50 | $49.16M | |
| Shawn Matthews - Director | Other | Warrants | 1,267,599 | $11.50 | $14.58M | |
| ||||||
IMSR insider trading FAQ
What is the latest insider trade for IMSR?
Terrestrial Energy Inc. /DE/ (IMSR) had 3 insider filings in the last 90 days, with the most recent on 2026-10-13. The full record for IMSR runs to 21 Form 4 filings, the earliest from 2025-10-30. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying IMSR stock?
1 insider purchase of IMSR was filed in the last 90 days, totaling $39K.
How many insiders are selling IMSR stock?
No insider sales of IMSR were filed in the last 90 days.
Where can I see IMSR SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects IMSR Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Materials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Frederick W. Buckman view on EDGAR
- - Pamela Beth Cowan view on EDGAR
- - Kathryn Ann McCarthy view on EDGAR
- - Steven M. Millsap view on EDGAR
- - Brian Patrick Thrasher view on EDGAR
- - William F. Smith view on EDGAR
- - David Michael Leblanc view on EDGAR
- - William D. Johnson view on EDGAR
- - Frederick W. Buckman view on EDGAR
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Learn more
- How to read insider buying signals
- What an open-market purchase by an insider can and cannot tell you.
- Insider activity in Materials
- Where IMSR's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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- IMSR on your watchlist
- Every IMSR Form 4 filing on record
- Up to 3 months of IMSR price history
- The daily trading plan of ranked insider buys, on a delay, with the plan archive
