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Israel Englander’s Arrowhead Research ARWR Stock Holding History

Israel Englander’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
2021
Q3 		– Sell
-20,000
Closed -$1.66M – 6757
2021
Q2 		$1.66M Buy
+20,000
New +$1.49M ﹤0.01% 4177
2020
Q1 		– Sell
-300,000
Closed -$19M – 3821
2019
Q4 		$19M Sell
300,000
-60,000
-17% -$2.98M 0.02% 879
2019
Q3 		$10.1M Buy
+360,000
New +$10.7M 0.02% 1275
2014
Q3 		– Sell
-86,000
Closed -$1.23M – 3674
2014
Q2 		$1.23M Buy
+86,000
New +$1.13M ﹤0.01% 2076

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

Israel Englander's ARWR Position: Q2 2026 in Review

Israel Englander opened a new position in Arrowhead Research (ARWR) in Q2 2026: 329,337 shares worth $26.8M. The stake represents 0.01% of the portfolio and ranks #1357 among its holdings. This is a return to the name: Israel Englander previously reported a position in ARWR as recently as Q4 2025.

Israel Englander first reported a position in ARWR in Q3 2013 and has held it in 45 quarters since. The position peaked at $36.5M in Q1 2014. 498 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

  • Israel Englander held 329,337 shares of Arrowhead Research worth $26.8M as of Q2 2026.
  • Arrowhead Research was a new Israel Englander position in Q2 2026.
  • Arrowhead Research made up 0.01% of Israel Englander's portfolio in Q2 2026, its #1357 holding.
  • Israel Englander first reported a position in Arrowhead Research in Q3 2013 and has held it in 45 quarters since.
  • Israel Englander's Arrowhead Research position peaked at $36.5M in Q1 2014.
  • 498 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

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