In the last 12 months, insiders at Terrestrial Energy Inc. /DE/ ($IMSR) filed 29 transactions with the SEC: 0 open-market purchases totaling $0 and 0 sales totaling $0. Net insider sentiment: neutral.
Terrestrial Energy Inc. /DE/ operates in the Fabricated plate work (boiler shops) industry (Manufacturing sector).
Most Active Insiders
- Matthews Shawn (Chairman and CEO) — 1 transaction totaling $300
- Loveless Jacob (Not found) — 1 transaction totaling $100
- Brenner Andrew Scott (Not found) — 1 transaction totaling $100
- Connor Michael J (Not found) — 1 transaction totaling $100
- Matthews Shawn (Director) — 8 transactions totaling $23
View all SEC Filings for Terrestrial Energy Inc. /DE/ (IMSR).
Set Up your own filters →Recent Insider Transactions
| Transaction Date | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 18, 2025 | JOHNSON WILLIAM D | Director | A | Restricted Stock Units | 1029 | $0.00 | 6,894.0000 | 81,771,423 | 17.54% | 0.00% |
| Dec. 18, 2025 | JOHNSON WILLIAM D | Director | A | Resricted Stock Units | 1720 | $0.00 | 7,585.0000 | 81,771,423 | 29.33% | 0.00% |
| Dec. 18, 2025 | JOHNSON WILLIAM D | Director | A | Restricted Stock Units | 5865 | $0.00 | 5,865.0000 | 81,771,423 | 9999.99% | 0.01% |
| Dec. 18, 2025 | BUCKMAN FREDERICK W | Director | A | Restricted Stock Units | 6703 | $0.00 | 6,703.0000 | 81,771,423 | 9999.99% | 0.01% |
| Dec. 18, 2025 | BUCKMAN FREDERICK W | Director | A | Resricted Stock Units | 1176 | $0.00 | 7,879.0000 | 81,771,423 | 17.54% | 0.00% |
| Dec. 18, 2025 | Jones Robert Wood | Director | A | Restricted Stock Units | 5865 | $0.00 | 5,865.0000 | 81,771,423 | 9999.99% | 0.01% |
| Dec. 18, 2025 | Jones Robert Wood | Director | A | Resricted Stock Units | 1029 | $0.00 | 6,894.0000 | 81,771,423 | 17.54% | 0.00% |
| Dec. 18, 2025 | Hill David John | Director | A | Restricted Stock Units | 3352 | $0.00 | 3,352.0000 | 81,771,423 | 9999.99% | 0.00% |
| Dec. 18, 2025 | Hill David John | Director | A | Resricted Stock Units | 588 | $0.00 | 3,940.0000 | 81,771,423 | 17.54% | 0.00% |
| Dec. 18, 2025 | Pardee Charles G | Director | A | Restricted Stock Units | 5027 | $0.00 | 5,027.0000 | 81,771,423 | 9999.99% | 0.01% |
| Dec. 18, 2025 | Pardee Charles G | Director | A | Resricted Stock Units | 882 | $0.00 | 5,909.0000 | 81,771,423 | 17.55% | 0.00% |
| Dec. 18, 2025 | MacDiarmid John Hugh | Director | A | Restricted Stock Units | 5865 | $0.00 | 5,865.0000 | 81,771,423 | 9999.99% | 0.01% |
| Dec. 18, 2025 | MacDiarmid John Hugh | Director | A | Resricted Stock Units | 1029 | $0.00 | 6,894.0000 | 81,771,423 | 17.54% | 0.00% |
| Dec. 18, 2025 | Matthews Shawn | Director | A | Restricted Stock Units | 4190 | $0.00 | 4,190.0000 | 81,771,423 | 9999.99% | 0.01% |
| Dec. 18, 2025 | Matthews Shawn | Director | A | Restricted Stock Units | 735 | $0.00 | 4,925.0000 | 81,771,423 | 17.54% | 0.00% |
| Nov. 6, 2025 | Matthews Shawn | Director | J | Warrants | 3500000 | $0.00 | 2,042,599.0000 | 0 | 63.15% | 0.00% |
| Nov. 6, 2025 | Matthews Shawn | Director | J | Common Stock, par value $0.0001 per share | 2920000 | $0.00 | 3,288,514.0000 | 0 | 47.03% | 0.00% |
| Oct. 28, 2025 | Matthews Shawn | Director | J | Warrants | 4275000 | $11.50 | 4,275,000.0000 | 0 | 50.00% | 0.00% |
| Oct. 28, 2025 | Matthews Shawn | Director | J | Warrants | 1267599 | $11.50 | 1,267,599.0000 | 0 | 50.00% | 0.00% |
| Oct. 28, 2025 | Irish Simon | Chief Executive Officer | A | Restricted Stock Units | 166298 | $0.00 | 166,298.0000 | 0 | 9999.99% | 0.00% |
| Oct. 28, 2025 | Connor Michael J | Other | J | Common Stock, par value $0.0001 per share | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| Oct. 28, 2025 | Brenner Andrew Scott | Other | J | Common Stock, par value $0.0001 per share | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| Oct. 28, 2025 | Loveless Jacob | Other | J | Common Stock, par value $0.0001 per share | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| Oct. 28, 2025 | Matthews Shawn | Director | J | Common Stock, par value $0.0001 per share | 5675000 | $0.00 | 6,208,514.0000 | 0 | 1063.70% | 0.00% |
| Oct. 28, 2025 | Matthews Shawn | Director | J | Common Stock, par value $0.0001 per share | 533514 | $0.00 | 6,208,514.0000 | 0 | 9.40% | 0.00% |
| Aug. 19, 2024 | Brenner Andrew Scott | Not found | J | Class B Ordinary Shares | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| Aug. 19, 2024 | Connor Michael J | Not found | J | Class B Ordinary Shares | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| Aug. 19, 2024 | Loveless Jacob | Not found | J | Class B Ordinary Shares | 25000 | $0.00 | 25,000.0000 | 0 | 9999.99% | 0.00% |
| Aug. 19, 2024 | Matthews Shawn | Chairman and CEO | J | Class B Ordinary Shares | 75000 | $0.00 | 5,675,000.0000 | 0 | 1.30% | 0.00% |