Hudson Bay Capital Management LP
Position in IMSR — Terrestrial Energy Inc. /DE/
CIK 1393825
STAMFORD, CT
Position in IMSR
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$4,172,194
+$1,456,211 QoQ
Shares Held
1,885,467
+7.4% QoQ
Ownership
1.78%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#10
of 107 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in IMSR Over Time
Shares Held
Position Value (USD)
Derivatives in IMSR
reported options exposure · as of Dec 31, 2025CallValue
$0
CallShares
0
PutValue
$611,000
PutShares
100,000
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Utilities - Regulated Electric
Utilities · as of Jun 30, 2026Hudson Bay Capital Management LP holds $543,409,303 across 21 Utilities - Regulated Electric names. IMSR ranks #18 (0.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ETR |
Entergy Corp /De/
|
569,554 | $65,418,972 | |
| 2 | NWE |
NorthWestern Energy Group, Inc.
|
903,026 | $64,674,722 | |
| 3 | AEP |
American Electric Power Co Inc
|
450,653 | $61,653,836 | |
| 4 | TXNM |
Txnm Energy Inc
|
888,032 | $50,422,456 | |
| 5 | FE |
Firstenergy Corp
|
854,839 | $40,639,046 | |
| 6 | XEL |
Xcel Energy Inc
|
491,605 | $39,475,881 | |
| 7 | AEE |
Ameren Corp
|
341,487 | $38,601,690 | |
| 8 | EVRG |
Evergy, Inc.
|
400,467 | $34,612,362 |
All Filings in IMSR
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 IMSRW | — | 1,296,174 | Shares | Sole | 2026-08-14 | |
| 2026-06-30 | $4,172,194 | 589,293 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 IMSRW | — | 1,303,050 | Shares | Sole | 2026-05-13 | |
| 2026-03-31 | $2,715,983 | 452,287 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 IMSRW | — | 247,400 | Shares | Sole | 2026-02-13 | |
| 2025-12-31 | $611,000 | 100,000 | Put | Sole | 2026-02-13 | |
| 2025-12-31 | $4,497,191 | 736,038 | Shares | Sole | 2026-02-13 | |
| No filing history on record for this holder in this stock. | ||||||