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Terrestrial Energy Inc.

IMSR
Exchange
Nasdaq
Industry
Fabricated Plate Work (Boiler Shops)
SEC CIK
0002019804

No open-market purchases or sales by Terrestrial Energy Inc. insiders were filed in the last 90 days; 110 institutions reported holding it in 13F filings for Q2 2026, worth $151.3M in total; no superinvestor holds it.

Other share classesIMSRW

Q3 2025 vs. Q2 2025

How the institutions holding Terrestrial Energy Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025All holders in Q2 2025

13F holders of IMSR: Q2 2025 compared with Q3 2025
MeasureQ2 2025Q3 2025Change
Holders6566+1
Shares18.8M9.90M−8.89M (−47.3%)
Value$209.6M$162.5M−$47.1M (−22.5%)

New holders (33)

Institutions that held Terrestrial Energy Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to IMSR in Q3 2025
InstitutionSharesValue% of portfolio
Davidson Kempner Capital Management LP270,540$4.44M0.06%
Sourcerock Group LLC257,900$4.23M0.29%
Alyeska Investment Group, L.P.244,672$4.02M0.01%
SIR Capital Management, L.P.217,600$3.57M0.32%
Waratah Capital Advisors Ltd.198,188$3.25M0.22%
Moore Capital Management, LP175,000$2.87M0.06%
Jane Street Group, LLC127,190$2.09M0.00%
BlueCrest Capital Management Ltd110,644$1.82M0.11%
HITE Hedge Asset Management LLC102,338$1.68M0.09%
Sona Asset Management (US) LLC100,000$1.64M0.06%
Galaxy Group Investments LLC100,000$1.64M0.16%
Jain Global LLC63,363$1.04M0.01%
Boothbay Fund Management, LLC58,698$963.2K0.02%
Simplex Trading, LLC48,514$796.0K0.02%
CastleKnight Management LP41,900$687.6K0.04%
Commonwealth Equity Services, LLC32,571$534.0K0.00%
Alpine Global Management, LLC29,300$480.8K0.10%
Bank of America Corp27,552$452.1K0.00%
Nations Financial Group Inc,27,047$443.8K0.03%
Private Advisor Group, LLC22,841$374.8K0.00%
EHP Funds Inc.13,895$228.0K0.30%
Maven Securities LTD12,200$200.2K0.04%
Raymond James Financial Inc10,809$177.4K0.00%
BNP Paribas Arbitrage, SA10,000$164.1K0.00%
Soltis Investment Advisors LLC10,000$164.1K0.01%
Royal Bank of Canada7,000$115.0K0.00%
CoreCap Advisors, LLC1,000$16.4K0.00%
Group One Trading, L.P.576$9.45K0.00%
Steward Partners Investment Advisory, LLC200$3.28K0.00%
Larson Financial Group LLC104$1.71K0.00%
Koesten, Hirschmann & Crabtree, INC.50$8210.00%
Redwood Park Advisors LLC44$7230.00%
Wealthspire Advisors, LLC20$3290.00%

Sold out (32)

Institutions that held Terrestrial Energy Inc. at the end of Q2 2025 and filed for Q3 2025 without it.