Massachusetts Financial Services
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Massachusetts Financial Services’s Arrowhead Research ARWR Stock Holding History

Massachusetts Financial Services’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 		$673K Buy
+8,252
New +$610K ﹤0.01% 925
2014
Q4 		– Sell
-135,141
Closed -$2M – 881
2014
Q3 		$2M Sell
135,141
-1,459
-1% -$19.9K ﹤0.01% 748
2014
Q2 		$1.96M Buy
136,600
+14,970
+12% +$196K ﹤0.01% 740
2014
Q1 		$2M Buy
+121,630
New +$2.14M ﹤0.01% 711

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

Massachusetts Financial Services's ARWR Position: Q2 2026 in Review

Massachusetts Financial Services opened a new position in Arrowhead Research (ARWR) in Q2 2026: 8,252 shares worth $673K. The stake represents ﹤0.01% of the portfolio and ranks #925 among its holdings. This is a return to the name: Massachusetts Financial Services previously reported a position in ARWR as recently as Q3 2014.

Massachusetts Financial Services first reported a position in ARWR in Q1 2014 and has held it in 4 quarters since. The position peaked at $2M in Q1 2014. 501 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

  • Massachusetts Financial Services held 8,252 shares of Arrowhead Research worth $673K as of Q2 2026.
  • Arrowhead Research was a new Massachusetts Financial Services position in Q2 2026.
  • Arrowhead Research made up ﹤0.01% of Massachusetts Financial Services's portfolio in Q2 2026, its #925 holding.
  • Massachusetts Financial Services first reported a position in Arrowhead Research in Q1 2014 and has held it in 4 quarters since.
  • Massachusetts Financial Services's Arrowhead Research position peaked at $2M in Q1 2014.
  • 501 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on Massachusetts Financial Services's 13F filing for Q2 2026, filed 3 Aug 2026.