Hudson Bay Capital Management LP
Position in ARWR — Arrowhead Pharmaceuticals, Inc.
CIK 1393825
STAMFORD, CT
Position in ARWR
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$2,088,286
-$1,933,480 QoQ
Shares Held
25,620
-60.1% QoQ
Ownership
0.018%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#197
of 497 holders
Holding Since
Jun 2020
15 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ARWR Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Hudson Bay Capital Management LP holds $565,820,903 across 77 Biotechnology names. ARWR ranks #38 (0.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
390,440 | $193,943,261 | |
| 2 | BMRN |
Biomarin Pharmaceutical Inc
|
825,002 | $47,206,614 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
148,720 | $44,769,181 | |
| 4 | BNTX |
BioNTech SE
|
260,000 | $24,193,000 | |
| 5 | IMCR |
Immunocore Holdings plc
|
590,000 | $18,732,500 | |
| 6 | TECH |
BIO-TECHNE Corp
|
200,000 | $14,130,000 | |
| 7 | VIR |
Vir Biotechnology, Inc.
|
1,364,000 | $13,899,160 | |
| 8 | PTCT |
Ptc Therapeutics, Inc.
|
159,778 | $13,033,091 |
All Filings in ARWR
Export CSV
15 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $2,088,286 | 25,620 | Shares | Defined | 2026-08-14 | |
| 2026-03-31 | $4,021,766 | 64,143 | Shares | Sole | 2026-05-13 | |
| 2025-09-30 | $3,104,100 | 90,000 | Shares | Sole | 2025-12-15 | |
| 2025-06-30 | $4,108,000 | 260,000 | Shares | Sole | 2025-08-18 | |
| 2025-03-31 | $2,715,276 | 213,130 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $3,290,000 | 175,000 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $4,261,400 | 220,000 | Shares | Sole | 2024-11-13 | |
| 2024-06-30 | $4,678,200 | 180,000 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $3,861,000 | 135,000 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $7,399,294 | 241,807 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $4,299,200 | 160,000 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $4,011,750 | 112,500 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $3,746,500 | 147,500 | Shares | Sole | 2023-05-15 | |
| 2022-03-31 | $1,544,528 | 33,584 | Shares | Sole | 2022-05-16 | |
| 2020-06-30 | $1,511,650 | 35,000 | Shares | Sole | 2020-08-12 | |
| No filing history on record for this holder in this stock. | ||||||