Terrestrial Energy Inc. (IMSR) ownership: Top institutional holder: Harraden Circle Investments, LLC ($732.61M). Insider activity: Net Seller (0 buys, 9 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Harraden Circle Investments, LLC | 122000.00 | $732.61M | 2026-03-31 |
| EXCHANGE TRADED CONCEPTS, LLC | 2091161.00 | $12.56M | 2026-03-31 |
| VANGUARD GROUP INC | 1849446.00 | $11.30M | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1303452.00 | $7.83M | 2026-03-31 |
| CITADEL ADVISORS LLC | 1277258.00 | $7.67M | 2026-03-31 |
| D. E. Shaw & Co., Inc. | 1214777.00 | $7.29M | 2026-03-31 |
| BlackRock, Inc. | 1120885.00 | $6.73M | 2026-03-31 |
| JPMORGAN CHASE & CO | 1073073.00 | $5.93M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-04-12 | |
| Sell | null | 2026-04-12 | |
| Sell | null | 2026-04-12 | |
| Sell | null | 2026-04-12 | |
| Sell | null | 2026-04-12 | |
| Sell | null | 2026-04-14 | |
| Sell | null | 2026-04-14 | |
| Sell | null | 2026-04-14 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.