Cormorant Asset Management’s Arrowhead Research ARWR Stock Holding History

Cormorant 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	$4.08M	Sell	50,000 -50,000	-50%	-$3.69M	0.21%	41
2026 Q1	$6.27M	Buy	+100,000	New	+$6.33M	0.31%	43
2014 Q4	–	Sell	-900,000	Closed	-$13.3M	–	73
2014 Q3	$13.3M	Hold	900,000	–	–	2.73%	8
2014 Q2	$12.9M	Sell	900,000 -100,000	-10%	-$1.31M	3.41%	10
2014 Q1	$16.4M	Buy	1,000,000 +4,500	+0.5%	+$79K	3.78%	8
2013 Q4	$10.8M	Buy	+995,500	New	+$7.96M	3.13%	12

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

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

Cormorant Asset Management reduced its Arrowhead Research (ARWR) stake by 50% in Q2 2026, selling an estimated $3.69M and leaving 50,000 shares worth $4.08M. The position accounts for 0.21% of the portfolio, ranked #41.

Cormorant Asset Management first reported a position in ARWR in Q4 2013 and has held it in 6 quarters since. The position peaked at $16.4M in Q1 2014. 500 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

Cormorant Asset Management held 50,000 shares of Arrowhead Research worth $4.08M as of Q2 2026.
Cormorant Asset Management sold 50,000 Arrowhead Research shares in Q2 2026, an estimated $3.69M.
Arrowhead Research made up 0.21% of Cormorant Asset Management's portfolio in Q2 2026, its #41 holding.
Cormorant Asset Management first reported a position in Arrowhead Research in Q4 2013 and has held it in 6 quarters since.
Cormorant Asset Management's Arrowhead Research position peaked at $16.4M in Q1 2014.
500 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on Cormorant Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.