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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

Q1 2025 vs. Q4 2024

How the institutions holding Terrestrial Energy Inc. changed between Q4 2024 and Q1 2025.

All holders in Q1 2025All holders in Q4 2024

13F holders of IMSR: Q4 2024 compared with Q1 2025
MeasureQ4 2024Q1 2025Change
Holders3545+10
Shares16.2M20.2M+4.06M (+25.1%)
Value$162.3M$213.4M+$51.1M (+31.5%)

New holders (18)

Institutions that held Terrestrial Energy Inc. at the end of Q1 2025 but not at the end of Q4 2024.

Institutions new to IMSR in Q1 2025
InstitutionSharesValue% of portfolio
Linden Advisors LP2,000,000$21.1M0.14%
Magnetar Financial LLC1,959,198$20.7M0.27%
MMCAP International Inc. SPC980,000$10.3M1.76%
Encompass Capital Advisors LLC946,165$10.0M0.38%
Calamos Advisors LLC500,000$5.29M0.02%
Commonwealth of Pennsylvania Public School Empls Retrmt Sys405,962$4.27M0.03%
Polar Asset Management Partners Inc.355,845$3.74M0.12%
Context Capital Management, LLC300,000$3.16M0.12%
DLD Asset Management, LP229,636$2.42M0.35%
Athos Capital Ltd200,000$2.10M2.67%
HRT Financial LP99,320$1.05M0.01%
Balyasny Asset Management LLC65,000$687.4K0.00%
Decagon Asset Management LLP56,178$591.0K0.54%
Susquehanna International Group, LLP40,291$426.1K0.00%
Glazer Capital, LLC36,831$387.0K0.02%
Mizuho Securities USA LLC25,837$271.3K0.01%
Morgan Stanley20,000$210.4K0.00%
FNY Investment Advisers, LLC100$1.00K0.00%

Sold out (8)

Institutions that held Terrestrial Energy Inc. at the end of Q4 2024 and filed for Q1 2025 without it.

Institutions that sold out of IMSR in Q1 2025
InstitutionShares, Q4 2024Value, Q4 2024
Karpus Management, Inc.1,293,947$13.0M
Highbridge Capital Management LLC500,000$5.01M
Centiva Capital, LP195,221$1.96M
Dakota Wealth Management103,450$1.04M
Heights Capital Management, Inc80,000$801.6K
Kepos Capital LP30,000$301.0K
Fir Tree Capital Management LP20,519$205.6K
Radcliffe Capital Management, L.P.13,400$134.3K