Who Owns Terrestrial Energy Inc. (IMSR)?Hedge Fund & Institutional Holders

$6.45-0.03 (-0.39%)EnergyNASDAQ

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$1.200000080000006e+286T

% of Float Held

1.7439022450075808e+282%

QoQ Change in Holders

+15 / -0

Price History

$6.11$9.36$12.61$15.85$19.10Oct 25Jan 26Mar 26

IMSR — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
CITADEL ADVISORS LLCNew Position+2.0M+$12.0B
BALYASNY ASSET MANAGEMENT L.P.New Position+1.4M+$8.0B
D. E. Shaw & Co., Inc.New Position+1.1M+$6.0B
JPMORGAN CHASE & CONew Position+1.2M+$6.0B
Senator Investment Group LPNew Position+900K+$5.5B
Alyeska Investment Group, L.P.New Position+722K+$4.0B
CANTOR FITZGERALD, L. P.New Position+550K+$3.4B
UBS Group AGNew Position+513K+$3.1B
HBK INVESTMENTS L PNew Position+500K+$3.1B
WINTON GROUP LtdNew Position+646K+$3.0B
SUSQUEHANNA INTERNATIONAL GROUP, LLPNew Position+349K+$2.0B
CHARLES SCHWAB INVESTMENT MANAGEMENT INCNew Position+411K+$2.0B
Shay Capital LLCNew Position+277K+$1.7B
HIGHBRIDGE CAPITAL MANAGEMENT LLCNew Position+244K+$1.5B
DANSKE BANK A/SNew Position+213K+$1.3B

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1CITADEL ADVISORS LLC2,029,208$12.0B1.80%Share
2BALYASNY ASSET MANAGEMENT L.P.1,400,953$8.0B10.16%Share
3JPMORGAN CHASE & CO1,103,742$6.0B0.38%Share
4D. E. Shaw & Co., Inc.1,079,546$6.0B3.29%Share
5Senator Investment Group LP900,000$5.5B0.22%Share
6Alyeska Investment Group, L.P.722,000$4.0B11.30%Share
7CANTOR FITZGERALD, L. P.550,000$3.4B50.98%Share
8UBS Group AG500,271$3.1B0.50%Share
9HBK INVESTMENTS L P500,000$3.1B24.00%Share
10WINTON GROUP Ltd646,190$3.0B0.10%Share
11SUSQUEHANNA INTERNATIONAL GROUP, LLP606,300$3.0B0.35%Call
12GROUP ONE TRADING LLC372,700$2.3B3.98%Call
13SUSQUEHANNA INTERNATIONAL GROUP, LLP348,532$2.0B0.23%Share
14CHARLES SCHWAB INVESTMENT MANAGEMENT INC410,877$2.0B0.31%Share
15SUSQUEHANNA INTERNATIONAL GROUP, LLP366,700$2.0B0.23%Put
16Shay Capital LLC277,363$1.7B0.17%Share
17HIGHBRIDGE CAPITAL MANAGEMENT LLC244,000$1.5B0.05%Share
18Caption Management, LLC217,800$1.3B9.12%Call
19DANSKE BANK A/S213,401$1.3B3.03%Share
20Caption Management, LLC201,000$1.2B8.42%Put
21Shay Capital LLC165,000$1.0B0.10%Call
22CITADEL ADVISORS LLC274,500$1.0B0.15%Call
23GOLDMAN SACHS GROUP INC281,764$1.0B0.12%Share
24RENAISSANCE TECHNOLOGIES LLC172,800$1.0B1.55%Share
25IMC-Chicago, LLC151,300$924.0M0.34%Call
26Harraden Circle Investments, LLC122,000$745.0M0.14%Share
27TIEMANN INVESTMENT ADVISORS, LLC75,995$464.0M0.18%Share
28CastleKnight Management LP60,700$370.0M0.01%Share
29HBK INVESTMENTS L P50,000$305.0M2.40%Put
30MOORE CAPITAL MANAGEMENT, LP50,000$305.0M4.39%Share
31IMC-Chicago, LLC49,100$300.0M0.11%Put
32Mount Lucas Management LP40,000$244.0M0.10%Share
33Magnetar Financial LLC23,822$145.0M1.42%Share
34LANDSCAPE CAPITAL MANAGEMENT, L.L.C.16,149$98.0M0.01%Share
35DANSKE BANK A/S370,000$85.0M0.20%Call
36UBS Group AG12,373$75.0M0.01%Share
37GROUP ONE TRADING LLC11,800$72.0M0.13%Put
38Anchor Investment Management, LLC2,100$12.8M0.00%Share
39VANGUARD GROUP INC1,452,261$8.0M0.12%Share
40Vennlight Capital Management, LP1,077,500$6.6M6.97%Call
41Magnetar Financial LLC1,063$6.0M0.06%Share
42BlackRock, Inc.1,074,969$6.0M0.10%Share
43LANDSCAPE CAPITAL MANAGEMENT, L.L.C.972$5.0M0.00%Share
44MMCAP International Inc. SPC750,000$4.6M0.46%Share
45Verition Fund Management LLC753,803$4.0M0.02%Share
46Cherry Tree Wealth Management, LLC692$4.0M0.00%Share
47Galaxy Group Investments LLC500,000$3.1M0.32%Share
48LMR Partners LLP588,214$3.0M0.01%Share
49VANGUARD GROUP INC370,130$2.0M0.03%Share
50STATE STREET CORP326,700$1.0M0.00%Share

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As of Q4 2025, 50 institutional investors hold IMSR (Terrestrial Energy Inc.). The largest holder is CITADEL ADVISORS LLC with $12.0B in shares. This quarter, 15 institutions opened new positions and 0 closed their positions.

Frequently Asked Questions

How many hedge funds own IMSR?

As of Q4 2025, 50 institutional investors report holding IMSR (Terrestrial Energy Inc.) in their 13F filings.

Who is the largest institutional holder of IMSR?

The largest institutional holder of IMSR is CITADEL ADVISORS LLC with $12.0B in shares.

Is institutional ownership of IMSR increasing or decreasing?

This quarter, 15 institutions opened new positions in IMSR and 0 closed their positions.