Jane Street
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Jane Street’s Arrowhead Research ARWR Stock Holding History

Jane Street’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 		$7.15M Sell
114,100
-18,300
-14% -$1.16M ﹤0.01% 2984
2025
Q4 		$8.79M Buy
132,400
+109,400
+476% +$5.36M ﹤0.01% 2480
2025
Q3 		$793K Sell
23,000
-25,200
-52% -$554K ﹤0.01% 6823
2025
Q2 		$762K Buy
48,200
+32,800
+213% +$471K ﹤0.01% 6115
2025
Q1 		$196K Sell
15,400
-14,900
-49% -$271K ﹤0.01% 8466
2024
Q4 		$570K Buy
+30,300
New +$624K ﹤0.01% 6517
2024
Q3 		– Sell
-145,800
Closed -$3.79M – 9536
2024
Q2 		$3.79M Buy
145,800
+113,200
+347% +$2.78M ﹤0.01% 3410
2024
Q1 		$932K Sell
32,600
-15,300
-32% -$489K ﹤0.01% 5549
2023
Q4 		$1.47M Buy
47,900
+1,800
+4% +$47.8K ﹤0.01% 4867
2023
Q3 		$1.24M Buy
46,100
+17,900
+63% +$548K ﹤0.01% 4858
2023
Q2 		$1.01M Buy
28,200
+19,100
+210% +$659K ﹤0.01% 5173
2023
Q1 		$231K Sell
9,100
-66,200
-88% -$2.08M ﹤0.01% 7613
2022
Q4 		$3.05M Sell
75,300
-18,600
-20% -$616K ﹤0.01% 3195
2022
Q3 		$3.1M Buy
93,900
+7,000
+8% +$283K ﹤0.01% 3395
2022
Q2 		$3.06M Buy
86,900
+32,100
+59% +$1.21M ﹤0.01% 3412
2022
Q1 		$2.52M Sell
54,800
-8,200
-13% -$406K ﹤0.01% 4300
2021
Q4 		$4.18M Sell
63,000
-2,800
-4% -$192K ﹤0.01% 3130
2021
Q3 		$4.11M Buy
65,800
+18,100
+38% +$1.17M ﹤0.01% 3063
2021
Q2 		$3.95M Buy
47,700
+33,800
+243% +$2.52M ﹤0.01% 3057
2021
Q1 		$922K Sell
13,900
-28,300
-67% -$2.2M ﹤0.01% 5612
2020
Q4 		$3.24M Sell
42,200
-52,300
-55% -$3.34M ﹤0.01% 2725
2020
Q3 		$4.07M Buy
94,500
+8,300
+10% +$358K ﹤0.01% 2083
2020
Q2 		$3.72M Buy
86,200
+58,900
+216% +$2.08M ﹤0.01% 2219
2020
Q1 		$785K Sell
27,300
-13,300
-33% -$536K ﹤0.01% 3079
2019
Q4 		$2.58M Buy
+40,600
New +$2.01M ﹤0.01% 1664
2015
Q1 		– Sell
-49,600
Closed -$366K – 3094
2014
Q4 		$366K Buy
+49,600
New +$337K ﹤0.01% 1724

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

Jane Street's ARWR Position: Q1 2026 in Review

Jane Street increased its Arrowhead Research (ARWR) stake by 178% in Q1 2026, buying an estimated $640K and bringing the position to 15,775 shares worth $989K. The position accounts for ﹤0.01% of the portfolio, ranked #6513.

Jane Street first reported a position in ARWR in Q2 2013 and has held it in 39 quarters since. The position peaked at $18.1M in Q2 2024. 436 funds tracked by Wall St. Rank hold ARWR as of Q1 2026.

  • Jane Street held 15,775 shares of Arrowhead Research worth $989K as of Q1 2026.
  • Jane Street bought 10,104 Arrowhead Research shares in Q1 2026, an estimated $640K.
  • Arrowhead Research made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #6513 holding.
  • Jane Street first reported a position in Arrowhead Research in Q2 2013 and has held it in 39 quarters since.
  • Jane Street's Arrowhead Research position peaked at $18.1M in Q2 2024.
  • 436 funds tracked by Wall St. Rank held Arrowhead Research as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.