Acadian Asset Management’s Arrowhead Research ARWR Stock Holding History

Acadian Asset 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	$1.08M	Sell	13,211 -7,324	-36%	-$541K	﹤0.01%	1245
2026 Q1	$1.29M	Buy	20,535 +5,229	+34%	+$331K	﹤0.01%	1084
2025 Q4	$1.01M	Buy	+15,306	New	+$750K	﹤0.01%	1115
2025 Q3	–	Sell	-1,542	Closed	-$24K	–	1811
2025 Q2	$24K	Buy	+1,542	New	+$22.1K	﹤0.01%	1564
2020 Q1	–	Sell	-1,926	Closed	-$122K	–	1781
2019 Q4	$122K	Buy	1,926 +1,569	+439%	+$77.9K	﹤0.01%	1404
2019 Q3	$10K	Sell	357 -932	-72%	-$27.6K	﹤0.01%	1762
2019 Q2	$34K	Buy	+1,289	New	+$28.3K	﹤0.01%	1536
2018 Q2	–	Sell	-40,452	Closed	-$291K	–	1690
2018 Q1	$291K	Sell	40,452 -31,212	-44%	-$192K	﹤0.01%	986
2017 Q4	$264K	Buy	71,664 +66,055	+1,178%	+$245K	﹤0.01%	915
2017 Q3	$24K	Buy	+5,609	New	+$13.4K	﹤0.01%	1192

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

Acadian Asset Management's ARWR Position: Q2 2026 in Review

Acadian Asset Management reduced its Arrowhead Research (ARWR) stake by 36% in Q2 2026, selling an estimated $541K and leaving 13,211 shares worth $1.08M. The position accounts for ﹤0.01% of the portfolio, ranked #1245.

Acadian Asset Management first reported a position in ARWR in Q3 2017 and has held it in 10 quarters since. The position peaked at $1.29M in Q1 2026. 500 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

Acadian Asset Management held 13,211 shares of Arrowhead Research worth $1.08M as of Q2 2026.
Acadian Asset Management sold 7,324 Arrowhead Research shares in Q2 2026, an estimated $541K.
Arrowhead Research made up ﹤0.01% of Acadian Asset Management's portfolio in Q2 2026, its #1245 holding.
Acadian Asset Management first reported a position in Arrowhead Research in Q3 2017 and has held it in 10 quarters since.
Acadian Asset Management's Arrowhead Research position peaked at $1.29M in Q1 2026.
500 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on Acadian Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.