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Baker Bros. Advisors’s Arrowhead Research ARWR Stock Holding History

Baker Bros. Advisors’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 		$162M Hold
1,992,783
– – 0.81% 20
2026
Q1 		$125M Sell
1,992,783
-182,862
-8% -$11.6M 0.72% 21
2025
Q4 		$144M Buy
2,175,645
+504,883
+30% +$24.7M 0.85% 16
2025
Q3 		$57.6M Buy
1,670,762
+731,588
+78% +$16.1M 0.42% 25
2025
Q2 		$14.8M Buy
+939,174
New +$13.5M 0.14% 45
2018
Q4 		– Sell
-307,496
Closed -$5.89M – 94
2018
Q3 		$5.89M Buy
+307,496
New +$5.05M 0.04% 67
2016
Q4 		– Sell
-1,856,967
Closed -$13.6M – 134
2016
Q3 		$13.6M Buy
1,856,967
+847,458
+84% +$5.49M 0.12% 46
2016
Q2 		$5.37M Hold
1,009,509
– – 0.06% 70
2016
Q1 		$4.87M Hold
1,009,509
– – 0.05% 74
2015
Q4 		$6.21M Hold
1,009,509
– – 0.05% 71
2015
Q3 		$5.82M Hold
1,009,509
– – 0.05% 75
2015
Q2 		$7.22M Sell
1,009,509
-280,678
-22% -$1.93M 0.06% 71
2015
Q1 		$8.73M Buy
1,290,187
+59,385
+5% +$421K 0.07% 64
2014
Q4 		$9.08M Hold
1,230,802
– – 0.09% 50
2014
Q3 		$18.2M Sell
1,230,802
-200,000
-14% -$2.73M 0.23% 38
2014
Q2 		$20.5M Buy
1,430,802
+698,740
+95% +$9.16M 0.25% 36
2014
Q1 		$12M Sell
732,062
-2,357,938
-76% -$41.4M 0.15% 45
2013
Q4 		$33.5M Sell
3,090,000
-50,000
-2% -$400K 0.47% 28
2013
Q3 		$17.9M Buy
+3,140,000
New +$12.1M 0.25% 35

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

Baker Bros. Advisors's ARWR Position: Q2 2026 in Review

Baker Bros. Advisors held its Arrowhead Research (ARWR) position steady in Q2 2026 at 1,992,783 shares worth $162M. The position accounts for 0.81% of the portfolio, ranked #20.

Baker Bros. Advisors first reported a position in ARWR in Q3 2013 and has held it in 19 quarters since. 501 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

  • Baker Bros. Advisors held 1,992,783 shares of Arrowhead Research worth $162M as of Q2 2026.
  • Baker Bros. Advisors left its Arrowhead Research share count unchanged in Q2 2026.
  • Arrowhead Research made up 0.81% of Baker Bros. Advisors's portfolio in Q2 2026, its #20 holding.
  • Baker Bros. Advisors first reported a position in Arrowhead Research in Q3 2013 and has held it in 19 quarters since.
  • 501 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on Baker Bros. Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.