Terrestrial Energy Inc
Ownership
Ownership Structure
Who owns Terrestrial Energy Inc (IMSR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 61.3% of the shares are freely tradable; institutional investors hold 26.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Capital Management, LLC | 3.22 | 3,414,196 | +161.9 | 06/30/2026 |
| Exchange Traded Concepts, LLC | 2.04 | 2,160,074 | +3.3 | 06/30/2026 |
| UBS Group AG | 1.67 | 1,772,173 | +259.0 | 06/30/2026 |
| HRT FINANCIAL LLC | 1.06 | 1,125,849 | +0.0 | 06/30/2026 |
| BlackRock Inc | 1.01 | 1,074,524 | -4.1 | 06/30/2026 |
| JPMorgan Chase & Co | 0.91 | 966,797 | -9.9 | 06/30/2026 |
| Geode Capital Management, LLC | 0.66 | 693,934 | +5.2 | 06/30/2026 |
| LMR Partners LLP | 0.65 | 690,702 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Global X Uranium ETF | 3.67 | 3,885,201 | -0.3 | 10/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.55 | 2,699,400 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Irish Simon | Chief Executive Officer | 2,879,846 | 7,487,600 $ | Oct 28, 2026 | direct |
| Buckman Frederick W | Director | 18,669 | 48,539 $ | Oct 9, 2026 | direct |
| Pardee Charles G | Director | 14,258 | 37,071 $ | Oct 14, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 28, 2026 | Irish Simon | Chief Executive Officer | Other | 55,432 | 0.00 | – |
| Oct 21, 2026 | Irish Simon | Chief Executive Officer | Other | 511,580 | 0.00 | – |
| Oct 14, 2026 | Pardee Charles G | Director | Buy | 7,500 | 2.95 | 22,125 |
| Oct 13, 2026 | Irish Simon | Chief Executive Officer | Buy | 16,900 | 3.01 | 50,818 |
| Oct 9, 2026 | Buckman Frederick W | Director | Buy | 12,000 | 3.28 | 39,336 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 13, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.