Terrestrial Energy
Develops IMSR molten-salt plants for low-carbon power and industrial heat.
$5.11
After-hours close+0.03 (+0.49%)
At close$5.09(−7.38%)
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Breakdown13F · Form 4
Institutions 22.54%18.64M sharesInsiders 10.36%8.57M sharesOther 67.10%55.51M shares
Shares outstanding 82.72M · Float 1.18M · 1.4% free float
Institutions13F, as of Mar 31, 2026
97 holders · 18.64M shares · 32 new positions · 56 increased · 23 reduced · 30 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Exchange Traded Concepts, LLC | 2.09M | 2.53% | +2.09Mnew | Apr 15, 2026 |
| Vanguard Capital Management LLC | 1.30M | 1.58% | +1.30Mnew | May 15, 2026 |
| Citadel Advisors LLC | 1.28M | 1.54% | −752.0K | May 15, 2026 |
| D. E. Shaw & Co., Inc. | 1.21M | 1.47% | +135.2K | May 15, 2026 |
| BlackRock, Inc. | 1.12M | 1.36% | +28.4K | May 13, 2026 |
| JPMorgan Chase & Co | 1.07M | 1.30% | −97.0K | May 13, 2026 |
| Alyeska Investment Group, L.P. | 722.0K | 0.87% | 0 | May 15, 2026 |
| LMR Partners LLP | 690.7K | 0.84% | +102.5K | May 15, 2026 |
Beneficial owners13D/G · 5% or more, as filed
No 13D/G filer at 5% or more on record.
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Sella Roberto Marco | 10 percent owner | 12.42M | 15.02% | Jan 22, 2026 |
| Simon Irish | director, officer: Chief Executive Officer | 5.11M | 6.18% | Nov 7, 2025 |
| Shawn Matthews | director | 3.29M | 3.98% | Nov 13, 2025 |
| John Hugh MacDiarmid | director | 25.9K | 0.03% | Nov 7, 2025 |
| Andrew Scott Brenner | other: Former Director | 25.0K | 0.03% | Oct 30, 2025 |
| Michael J. Connor | other: Former Director | 25.0K | 0.03% | Oct 30, 2025 |
| Jacob Loveless | other: Former Director | 25.0K | 0.03% | Oct 30, 2025 |
| Frederick W. Buckman | director | 21.6K | 0.03% | Nov 7, 2025 |
| David Michael LeBlanc | director, officer: Chief Technology Officer | 19.7K | 0.02% | Nov 7, 2025 |
| David John Hill | director | 18.5K | 0.02% | Nov 7, 2025 |
1 ten-percent owner holds 12.42M shares by Form 4, outside the officers-and-directors figure above
Latest trades
No open-market trades in the last 12 months.
CongressHouse and Senate disclosures
Not reported.