John Overdeck’s Arrowhead Research ARWR Stock Holding History

John Overdeck’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	–	Sell	-4,100	Closed	-$257K	–	5054
2026 Q1	$257K	Buy	+4,100	New	+$260K	﹤0.01%	4161

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

John Overdeck's ARWR Position: Q2 2026 in Review

John Overdeck increased its Arrowhead Research (ARWR) stake by 1,522% in Q2 2026, buying an estimated $40.2M and bringing the position to 580,609 shares worth $47.3M. The position accounts for 0.03% of the portfolio, ranked #581.

John Overdeck first reported a position in ARWR in Q4 2013 and has held it in 25 quarters since. 498 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

John Overdeck held 580,609 shares of Arrowhead Research worth $47.3M as of Q2 2026.
John Overdeck bought 544,809 Arrowhead Research shares in Q2 2026, an estimated $40.2M.
Arrowhead Research made up 0.03% of John Overdeck's portfolio in Q2 2026, its #581 holding.
John Overdeck first reported a position in Arrowhead Research in Q4 2013 and has held it in 25 quarters since.
498 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.