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Avoro Capital Advisors’s Arrowhead Research ARWR Stock Holding History

Avoro Capital Advisors’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 		$926M Buy
11,355,555
+655,556
+6% +$48.4M 8.31% 6
2026
Q1 		$671M Buy
10,699,999
+74,999
+0.7% +$4.75M 6.6% 6
2025
Q4 		$705M Sell
10,625,000
-275,000
-3% -$13.5M 6.93% 6
2025
Q3 		$376M Buy
10,900,000
+300,000
+3% +$6.6M 4.86% 6
2025
Q2 		$167M Sell
10,600,000
-511,111
-5% -$7.33M 2.93% 13
2025
Q1 		$142M Hold
11,111,111
– – 2.21% 14
2024
Q4 		$209M Buy
11,111,111
+2,222,223
+25% +$45.8M 2.95% 13
2024
Q3 		$172M Hold
8,888,888
– – 2.51% 14
2024
Q2 		$231M Buy
8,888,888
+333,333
+4% +$8.19M 3.08% 13
2024
Q1 		$245M Buy
8,555,555
+7,425,555
+657% +$238M 2.85% 13
2023
Q4 		$34.6M Buy
1,130,000
+565,000
+100% +$15M 0.48% 28
2023
Q3 		$15.2M Buy
565,000
+207,597
+58% +$6.36M 0.24% 35
2023
Q2 		$12.7M Buy
+357,403
New +$12.3M 0.17% 36
2018
Q4 		– Sell
-849,899
Closed -$16.3M – 37
2018
Q3 		$16.3M Buy
849,899
+399,899
+89% +$6.56M 0.75% 24
2018
Q2 		$6.12M Buy
+450,000
New +$4.21M 0.24% 35
2015
Q1 		– Sell
-525,000
Closed -$3.88M – 34
2014
Q4 		$3.88M Buy
+525,000
New +$3.57M 2.63% 14

Other funds holding ARWR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
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
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return

Avoro Capital Advisors's ARWR Position: Q2 2026 in Review

Avoro Capital Advisors increased its Arrowhead Research (ARWR) stake by 6.1% in Q2 2026, buying an estimated $48.4M and bringing the position to 11,355,555 shares worth $926M. The position accounts for 8.31% of the portfolio, ranked #6.

Avoro Capital Advisors first reported a position in ARWR in Q4 2014 and has held it in 16 quarters since. 500 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

  • Avoro Capital Advisors held 11,355,555 shares of Arrowhead Research worth $926M as of Q2 2026.
  • Avoro Capital Advisors bought 655,556 Arrowhead Research shares in Q2 2026, an estimated $48.4M.
  • Arrowhead Research made up 8.31% of Avoro Capital Advisors's portfolio in Q2 2026, its #6 holding.
  • Avoro Capital Advisors first reported a position in Arrowhead Research in Q4 2014 and has held it in 16 quarters since.
  • 500 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

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