Arrowstreet Capital’s Arrowhead Research ARWR Stock Holding History

Arrowstreet Capital’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 Q1	$36.8M	Sell	587,125 -1,500,828	-72%	-$95M	0.02%	577
2025 Q4	$139M	Buy	2,087,953 +6,264	+0.3%	+$307K	0.08%	236
2025 Q3	$71.8M	Buy	2,081,689 +2,017,489	+3,143%	+$44.4M	0.05%	369
2025 Q2	$1.01M	Buy	+64,200	New	+$921K	﹤0.01%	1606
2020 Q1	–	Sell	-470,679	Closed	-$29.9M	–	1857
2019 Q4	$29.9M	Buy	+470,679	New	+$23.4M	0.07%	286
2019 Q2	–	Sell	-215,536	Closed	-$3.96M	–	1380
2019 Q1	$3.96M	Buy	+215,536	New	+$3.56M	0.01%	876

Other funds holding ARWR

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

ACA

Avoro Capital Advisors New York $10.2B AUM 149.19% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

FAM

Fred Alger Management New York $22.8B AUM 64.63% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

VPC

Vestal Point Capital New York $3.58B AUM 189.12% 1-Year Est. Return

Arrowstreet Capital's ARWR Position: Q1 2026 in Review

Arrowstreet Capital reduced its Arrowhead Research (ARWR) stake by 72% in Q1 2026, selling an estimated $95M and leaving 587,125 shares worth $36.8M. The position accounts for 0.02% of the portfolio, ranked #577.

Arrowstreet Capital first reported a position in ARWR in Q1 2019 and has held it in 6 quarters since. The position peaked at $139M in Q4 2025. 436 funds tracked by Wall St. Rank hold ARWR as of Q1 2026.

Arrowstreet Capital held 587,125 shares of Arrowhead Research worth $36.8M as of Q1 2026.
Arrowstreet Capital sold 1,500,828 Arrowhead Research shares in Q1 2026, an estimated $95M.
Arrowhead Research made up 0.02% of Arrowstreet Capital's portfolio in Q1 2026, its #577 holding.
Arrowstreet Capital first reported a position in Arrowhead Research in Q1 2019 and has held it in 6 quarters since.
Arrowstreet Capital's Arrowhead Research position peaked at $139M in Q4 2025.
436 funds tracked by Wall St. Rank held Arrowhead Research as of Q1 2026.

Based on Arrowstreet Capital's 13F filing for Q1 2026, filed 14 May 2026.