Driehaus Capital Management’s Arrowhead Research ARWR Stock Holding History

Driehaus 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	$110M	Buy	1,350,556 +160,221	+13%	+$11.8M	0.64%	41
2026 Q1	$74.6M	Sell	1,190,335 -579,005	-33%	-$36.7M	0.55%	47
2025 Q4	$117M	Sell	1,769,340 -330,058	-16%	-$16.2M	0.8%	26
2025 Q3	$72.4M	Buy	+2,099,398	New	+$46.2M	0.52%	58
2024 Q1	–	Sell	-29,493	Closed	-$902K	–	391
2023 Q4	$902K	Hold	29,493	–	–	0.01%	319
2023 Q3	$792K	Sell	29,493 -478,168	-94%	-$14.6M	0.01%	335
2023 Q2	$18.1M	Buy	+507,661	New	+$17.5M	0.23%	141
2014 Q4	–	Sell	-190,762	Closed	-$2.82M	–	496
2014 Q3	$2.82M	Sell	190,762 -28,958	-13%	-$396K	0.11%	250
2014 Q2	$3.14M	Buy	219,720 +46,316	+27%	+$607K	0.1%	272
2014 Q1	$2.85M	Buy	173,404 +1,747	+1%	+$30.7K	0.09%	270
2013 Q4	$1.86M	Buy	+171,657	New	+$1.37M	0.07%	327

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

Driehaus Capital Management's ARWR Position: Q2 2026 in Review

Driehaus Capital Management increased its Arrowhead Research (ARWR) stake by 13% in Q2 2026, buying an estimated $11.8M and bringing the position to 1,350,556 shares worth $110M. The position accounts for 0.64% of the portfolio, ranked #41.

Driehaus Capital Management first reported a position in ARWR in Q4 2013 and has held it in 11 quarters since. The position peaked at $117M in Q4 2025. 501 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

Driehaus Capital Management held 1,350,556 shares of Arrowhead Research worth $110M as of Q2 2026.
Driehaus Capital Management bought 160,221 Arrowhead Research shares in Q2 2026, an estimated $11.8M.
Arrowhead Research made up 0.64% of Driehaus Capital Management's portfolio in Q2 2026, its #41 holding.
Driehaus Capital Management first reported a position in Arrowhead Research in Q4 2013 and has held it in 11 quarters since.
Driehaus Capital Management's Arrowhead Research position peaked at $117M in Q4 2025.
501 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

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