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Rhenman & Partners Asset Management’s Arrowhead Research ARWR Stock Holding History

Rhenman & Partners 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 		$10.4M Sell
128,000
-16,500
-11% -$1.22M 0.98% 49
2026
Q1 		$9.06M Hold
144,500
– – 1.12% 34
2025
Q4 		$9.59M Buy
+144,500
New +$7.08M 0.9% 45

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

Rhenman & Partners Asset Management's ARWR Position: Q2 2026 in Review

Rhenman & Partners Asset Management reduced its Arrowhead Research (ARWR) stake by 11% in Q2 2026, selling an estimated $1.22M and leaving 128,000 shares worth $10.4M. The position accounts for 0.98% of the portfolio, ranked #49.

Rhenman & Partners Asset Management first reported a position in ARWR in Q4 2025 and has held it in 3 quarters since. 500 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

  • Rhenman & Partners Asset Management held 128,000 shares of Arrowhead Research worth $10.4M as of Q2 2026.
  • Rhenman & Partners Asset Management sold 16,500 Arrowhead Research shares in Q2 2026, an estimated $1.22M.
  • Arrowhead Research made up 0.98% of Rhenman & Partners Asset Management's portfolio in Q2 2026, its #49 holding.
  • Rhenman & Partners Asset Management first reported a position in Arrowhead Research in Q4 2025 and has held it in 3 quarters since.
  • 500 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on Rhenman & Partners Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.