XT
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XTX Topco’s Arrowhead Research ARWR Stock Holding History

XTX Topco’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 		$2.33M Buy
+28,590
New +$2.11M 0.03% 958
2025
Q2 		– Sell
-10,421
Closed -$133K – 2331
2025
Q1 		$133K Buy
+10,421
New +$189K 0.01% 1797
2023
Q4 		– Sell
-19,707
Closed -$530K – 1572
2023
Q3 		$530K Buy
19,707
+12,983
+193% +$398K 0.09% 365
2023
Q2 		$240K Buy
+6,724
New +$232K 0.04% 886
2021
Q2 		– Sell
-6,013
Closed -$399K – 797
2021
Q1 		$399K Buy
+6,013
New +$467K 0.19% 165

Other funds holding ARWR

BlackRock
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
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

XTX Topco's ARWR Position: Q2 2026 in Review

XTX Topco opened a new position in Arrowhead Research (ARWR) in Q2 2026: 28,590 shares worth $2.33M. The stake represents 0.03% of the portfolio and ranks #958 among its holdings. This is a return to the name: XTX Topco previously reported a position in ARWR as recently as Q1 2025.

XTX Topco first reported a position in ARWR in Q1 2021 and has held it in 5 quarters since. 502 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

  • XTX Topco held 28,590 shares of Arrowhead Research worth $2.33M as of Q2 2026.
  • Arrowhead Research was a new XTX Topco position in Q2 2026.
  • Arrowhead Research made up 0.03% of XTX Topco's portfolio in Q2 2026, its #958 holding.
  • XTX Topco first reported a position in Arrowhead Research in Q1 2021 and has held it in 5 quarters since.
  • 502 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.