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Deerfield Management’s Arrowhead Research ARWR Stock Holding History

Deerfield 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
Q1 		$98.6M Sell
1,573,297
-259,649
-14% -$16.4M 1.16% 22
2025
Q4 		$122M Buy
1,832,946
+839,946
+85% +$41.2M 1.55% 19
2025
Q3 		$34.2M Buy
+993,000
New +$21.8M 0.52% 45
2024
Q4 		– Sell
-26,439
Closed -$512K – 139
2024
Q3 		$512K Buy
26,439
+6,978
+36% +$170K 0.01% 283
2024
Q2 		$506K Buy
+19,461
New +$478K 0.01% 261
2014
Q1 		– Sell
-142,017
Closed -$1.54M – 126
2013
Q4 		$1.54M Buy
+142,017
New +$1.14M 0.08% 91

Other funds holding ARWR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
ACA
Avoro Capital Advisors New York $10.2B AUM 149.19% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
FAM
Fred Alger Management New York $22.8B AUM 64.63% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VPC
Vestal Point Capital New York $3.58B AUM 189.12% 1-Year Est. Return

Deerfield Management's ARWR Position: Q1 2026 in Review

Deerfield Management reduced its Arrowhead Research (ARWR) stake by 14% in Q1 2026, selling an estimated $16.4M and leaving 1,573,297 shares worth $98.6M. The position accounts for 1.16% of the portfolio, ranked #22.

Deerfield Management first reported a position in ARWR in Q4 2013 and has held it in 6 quarters since. The position peaked at $122M in Q4 2025. 436 funds tracked by Wall St. Rank hold ARWR as of Q1 2026.

  • Deerfield Management held 1,573,297 shares of Arrowhead Research worth $98.6M as of Q1 2026.
  • Deerfield Management sold 259,649 Arrowhead Research shares in Q1 2026, an estimated $16.4M.
  • Arrowhead Research made up 1.16% of Deerfield Management's portfolio in Q1 2026, its #22 holding.
  • Deerfield Management first reported a position in Arrowhead Research in Q4 2013 and has held it in 6 quarters since.
  • Deerfield Management's Arrowhead Research position peaked at $122M in Q4 2025.
  • 436 funds tracked by Wall St. Rank held Arrowhead Research as of Q1 2026.

Based on Deerfield Management's 13F filing for Q1 2026, filed 15 May 2026.