Hudson Bay Capital Management’s Arrowhead Research ARWR Stock Holding History

Hudson Bay Capital Management’s Portfolio ARWR Stock Details ARWR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$2.09M	Sell	25,620 -38,523	-60%	-$2.85M	0.01%	803
2026 Q1	$4.02M	Buy	+64,143	New	+$4.06M	0.01%	576
2025 Q4	–	Sell	-90,000	Closed	-$3.1M	–	1191
2025 Q3	$3.1M	Sell	90,000 -170,000	-65%	-$3.74M	0.01%	662
2025 Q2	$4.11M	Buy	260,000 +46,870	+22%	+$672K	0.01%	597
2025 Q1	$2.72M	Buy	213,130 +38,130	+22%	+$693K	0.01%	760
2024 Q4	$3.29M	Sell	175,000 -45,000	-20%	-$927K	0.01%	572
2024 Q3	$4.26M	Buy	220,000 +40,000	+22%	+$976K	0.02%	444
2024 Q2	$4.68M	Buy	180,000 +45,000	+33%	+$1.11M	0.02%	391
2024 Q1	$3.86M	Sell	135,000 -106,807	-44%	-$3.42M	0.02%	355
2023 Q4	$7.4M	Buy	241,807 +81,807	+51%	+$2.17M	0.05%	238
2023 Q3	$4.3M	Buy	160,000 +47,500	+42%	+$1.46M	0.03%	328
2023 Q2	$4.01M	Sell	112,500 -35,000	-24%	-$1.21M	0.03%	356
2023 Q1	$3.75M	Buy	+147,500	New	+$4.64M	0.03%	380
2022 Q2	–	Sell	-33,584	Closed	-$1.54M	–	1332
2022 Q1	$1.54M	Buy	+33,584	New	+$1.66M	0.02%	751
2020 Q3	–	Sell	-35,000	Closed	-$1.51M	–	544
2020 Q2	$1.51M	Buy	+35,000	New	+$1.24M	0.03%	339
2019 Q1	–	Sell	-30,000	Closed	-$373K	–	689
2018 Q4	$373K	Buy	+30,000	New	+$410K	0.01%	704

Other funds holding ARWR

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

ACA

Avoro Capital Advisors New York $11.1B AUM 207.82% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

FAM

Fred Alger Management New York $30B AUM 76.99% 1-Year Est. Return

Hudson Bay Capital Management's ARWR Position: Q2 2026 in Review

Hudson Bay Capital Management reduced its Arrowhead Research (ARWR) stake by 60% in Q2 2026, selling an estimated $2.85M and leaving 25,620 shares worth $2.09M. The position accounts for 0.01% of the portfolio, ranked #803.

Hudson Bay Capital Management first reported a position in ARWR in Q4 2018 and has held it in 16 quarters since. The position peaked at $7.4M in Q4 2023. 500 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

Hudson Bay Capital Management held 25,620 shares of Arrowhead Research worth $2.09M as of Q2 2026.
Hudson Bay Capital Management sold 38,523 Arrowhead Research shares in Q2 2026, an estimated $2.85M.
Arrowhead Research made up 0.01% of Hudson Bay Capital Management's portfolio in Q2 2026, its #803 holding.
Hudson Bay Capital Management first reported a position in Arrowhead Research in Q4 2018 and has held it in 16 quarters since.
Hudson Bay Capital Management's Arrowhead Research position peaked at $7.4M in Q4 2023.
500 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on Hudson Bay Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.