Jim Simons
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Jim Simons’s Arrowhead Research ARWR Stock Holding History

Jim Simons’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 		$65M Buy
+1,036,495
New +$65.6M 0.1% 250
2024
Q4 		– Sell
-231,300
Closed -$4.48M – 3558
2024
Q3 		$4.48M Buy
+231,300
New +$5.65M 0.01% 1516
2024
Q1 		– Sell
-122,000
Closed -$3.73M – 3690
2023
Q4 		$3.73M Sell
122,000
-259,500
-68% -$6.89M 0.01% 1540
2023
Q3 		$10.3M Sell
381,500
-3,400
-0.9% -$104K 0.02% 906
2023
Q2 		$13.7M Buy
384,900
+92,100
+31% +$3.18M 0.02% 864
2023
Q1 		$7.44M Sell
292,800
-201,000
-41% -$6.32M 0.01% 1253
2022
Q4 		$20M Sell
493,800
-261,600
-35% -$8.67M 0.03% 709
2022
Q3 		$25M Buy
755,400
+314,400
+71% +$12.7M 0.04% 571
2022
Q2 		$15.5M Buy
441,000
+60,700
+16% +$2.28M 0.02% 863
2022
Q1 		$17.5M Buy
+380,300
New +$18.8M 0.02% 820
2021
Q4 		– Sell
-54,100
Closed -$3.38M – 3883
2021
Q3 		$3.38M Sell
54,100
-125,100
-70% -$8.1M ﹤0.01% 1701
2021
Q2 		$14.8M Sell
179,200
-62,400
-26% -$4.65M 0.02% 927
2021
Q1 		$16M Buy
+241,600
New +$18.7M 0.02% 910
2020
Q2 		– Sell
-666,400
Closed -$19.2M – 3422
2020
Q1 		$19.2M Sell
666,400
-55,900
-8% -$2.25M 0.02% 795
2019
Q4 		$45.8M Buy
722,300
+64,700
+10% +$3.21M 0.04% 563
2019
Q3 		$18.5M Sell
657,600
-131,200
-17% -$3.88M 0.02% 1001
2019
Q2 		$20.9M Buy
788,800
+618,400
+363% +$13.6M 0.02% 936
2019
Q1 		$3.13M Buy
+170,400
New +$2.81M ﹤0.01% 2089
2017
Q3 		– Sell
-374,164
Closed -$606K – 3190
2017
Q2 		$606K Buy
+374,164
New +$606K ﹤0.01% 2716
2014
Q1 		– Sell
-54,400
Closed -$590K – 2806
2013
Q4 		$590K Buy
+54,400
New +$435K ﹤0.01% 2303

Other funds holding ARWR

BlackRock
BlackRock New York $6.73T AUM 46.02% 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 $3.37T AUM 44.26% 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

Jim Simons's ARWR Position: Q1 2026 in Review

Jim Simons opened a new position in Arrowhead Research (ARWR) in Q1 2026: 1,036,495 shares worth $65M. The stake represents 0.1% of the portfolio and ranks #250 among its holdings. This is a return to the name: Jim Simons previously reported a position in ARWR as recently as Q3 2024.

Jim Simons first reported a position in ARWR in Q4 2013 and has held it in 20 quarters since. 436 funds tracked by Wall St. Rank hold ARWR as of Q1 2026.

  • Jim Simons held 1,036,495 shares of Arrowhead Research worth $65M as of Q1 2026.
  • Arrowhead Research was a new Jim Simons position in Q1 2026.
  • Arrowhead Research made up 0.1% of Jim Simons's portfolio in Q1 2026, its #250 holding.
  • Jim Simons first reported a position in Arrowhead Research in Q4 2013 and has held it in 20 quarters since.
  • 436 funds tracked by Wall St. Rank held Arrowhead Research as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.