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PDT Partners’s Arrowhead Research ARWR Stock Holding History

PDT Partners’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 		– Sell
-70,048
Closed -$4.39M – 504
2026
Q1 		$4.39M Hold
70,048
– – 0.26% 125
2025
Q4 		$4.65M Sell
70,048
-20,771
-23% -$1.02M 0.3% 113
2025
Q3 		$3.13M Sell
90,819
-62,169
-41% -$1.37M 0.2% 179
2025
Q2 		$2.42M Buy
+152,988
New +$2.19M 0.14% 265
2024
Q4 		– Sell
-16,241
Closed -$315K – 715
2024
Q3 		$315K Buy
+16,241
New +$396K 0.03% 596
2022
Q4 		– Sell
-6,391
Closed -$211K – 635
2022
Q3 		$211K Buy
+6,391
New +$258K 0.03% 698
2022
Q2 		– Sell
-16,684
Closed -$767K – 949
2022
Q1 		$767K Buy
16,684
+11,597
+228% +$574K 0.07% 461
2021
Q4 		$337K Sell
5,087
-12,467
-71% -$857K 0.03% 642
2021
Q3 		$1.1M Buy
17,554
+8,700
+98% +$563K 0.08% 329
2021
Q2 		$733K Buy
+8,854
New +$659K 0.05% 428
2020
Q4 		– Sell
-5,344
Closed -$230K – 690
2020
Q3 		$230K Buy
+5,344
New +$231K 0.02% 603
2018
Q3 		– Sell
-104,500
Closed -$1.42M – 474
2018
Q2 		$1.42M Sell
104,500
-354,900
-77% -$3.32M 0.05% 291
2018
Q1 		$3.31M Buy
459,400
+124,200
+37% +$765K 0.11% 209
2017
Q4 		$1.23M Buy
+335,200
New +$1.25M 0.04% 348
2015
Q3 		– Sell
-11,371
Closed -$81K – 1254
2015
Q2 		$81K Sell
11,371
-3,654
-24% -$25.1K ﹤0.01% 1305
2015
Q1 		$102K Buy
+15,025
New +$107K ﹤0.01% 1325
2014
Q3 		– Sell
-18,054
Closed -$258K – 1291
2014
Q2 		$258K Sell
18,054
-16,172
-47% -$212K 0.01% 1237
2014
Q1 		$562K Buy
+34,226
New +$601K 0.01% 883

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

PDT Partners's ARWR Position: Q2 2026 in Review

PDT Partners sold out of Arrowhead Research (ARWR) in Q2 2026, closing a stake of 70,048 shares — an estimated $4.39M sold.

PDT Partners first reported a position in ARWR in Q1 2014 and held it in 18 quarters. The position peaked at $4.65M in Q4 2025. 500 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.

  • PDT Partners reported no remaining Arrowhead Research position as of Q2 2026 after selling out during the quarter.
  • PDT Partners sold 70,048 Arrowhead Research shares in Q2 2026, an estimated $4.39M.
  • PDT Partners first reported a position in Arrowhead Research in Q1 2014 and held it in 18 quarters.
  • PDT Partners's Arrowhead Research position peaked at $4.65M in Q4 2025.
  • 500 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.

Based on PDT Partners's 13F filing for Q2 2026, filed 14 Aug 2026.