Ticker · CUSIP 881454102

IMSR

TERRESTRIAL ENERGY INC

···Share

Holders (tracked)

Combined shares

3,869,199

Combined value

$23.64M

Last close

$7.61

Quarter

2025Q4

Price is +24.5% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$7.61-3.12 (-29.06%)H $27.10 · L $5.53 · Avg Vol 1.7M

Position opened

SEC event timeline

7 events

Two Sigma Investments opened position2026-02-17
+57,712 shares · 2025Q4
Position
D.E. Shaw & Co. opened position2026-02-17
+1,079,546 shares · 2025Q4
Position
Jeremy Grantham (GMO) opened position2026-02-17
+11,475 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) opened position2026-02-17
+2,029,208 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) opened position2026-02-17
+31,658 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+103,000 shares · 2025Q4
Position
Renaissance Technologies opened position2026-02-12
+172,800 shares · 2025Q4
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for IMSR →

Follow-the-investor returns

If you'd copied each holder of IMSR…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Jeremy Grantham (GMO)	2025Q4	$6.11	+24.5%	$87K
Izzy Englander (Millennium Mgmt)	2025Q4	$6.11	+24.5%	$241K
Two Sigma Investments	2025Q4	$6.11	+24.5%	$439K
D.E. Shaw & Co.	2025Q4	$6.11	+24.5%	$8.2M
Renaissance Technologies	2025Q4	$6.11	+24.5%	$1.3M
Paul Tudor Jones (Tudor Investment)	2025Q4	$6.11	+24.5%	$783K
Ken Griffin (Citadel Advisors)	2025Q4	$6.11	+24.5%	$831K
Ken Griffin (Citadel Advisors)	2025Q4	$6.11	+24.5%	$831K
Ken Griffin (Citadel Advisors)	2025Q4	$6.11	+24.5%	$831K

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions7

Ken Griffin (Citadel Advisors)
+2,029,208
$12.4M
D.E. Shaw & Co.
+1,079,546
$6.6M
Renaissance Technologies
+172,800
$1.1M
Paul Tudor Jones (Tudor Investment)
+103,000
$629K
Two Sigma Investments
+57,712
$353K
Izzy Englander (Millennium Mgmt)
+31,658
$193K
Jeremy Grantham (GMO)
+11,475
$70K

Added to0

—

Trimmed0

—

Exited0

—

Who owns IMSR

9 super-investors · 2025Q4

Tracked stake

3.87M

Combined value

$24M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New9

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	Ken Griffin Citadel Advisors	2.03M	$12M	0.0%	New+2.03M
2	D.E. Shaw & Co.	1.08M	$7M	0.0%	New+1.08M	—
3	Ken Griffin Citadel Advisors	274.5K	$2M	0.0%	New+2.03M
4	Renaissance Technologies	172.8K	$1M	0.0%	New+172.8K	—
5	Ken Griffin Citadel Advisors	109.3K	$668K	0.0%	New+2.03M
6	Paul Tudor Jones Tudor Investment	103.0K	$629K	0.0%	New+103.0K	—
7	Two Sigma Investments	57.7K	$353K	0.0%	New+57.7K	—
8	Izzy Englander Millennium Mgmt	31.7K	$193K	0.0%	New+31.7K	—
9	Jeremy Grantham GMO	11.5K	$70K	0.0%	New+11.5K	—

Recent moves

7 transactions

NEWTwo Sigma Investments
+57,712 · 2025Q4
NEWD.E. Shaw & Co.
+1,079,546 · 2025Q4
NEWJeremy Grantham (GMO)
+11,475 · 2025Q4
NEWKen Griffin (Citadel Advisors)
+2,029,208 · 2025Q4
NEWIzzy Englander (Millennium Mgmt)
+31,658 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+103,000 · 2025Q4
NEWRenaissance Technologies
+172,800 · 2025Q4

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