Janus Henderson Group
ARWR icon

Janus Henderson Group’s Arrowhead Research ARWR Stock Holding History

Janus Henderson Group’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 		$90.1M Buy
1,436,990
+156,544
+12% +$9.91M 0.04% 301
2025
Q4 		$85M Buy
1,280,446
+306,879
+32% +$15M 0.04% 318
2025
Q3 		$33.5M Buy
973,567
+923,722
+1,853% +$20.3M 0.02% 497
2025
Q2 		$788K Hold
49,845
– – ﹤0.01% 1726
2025
Q1 		$689K Hold
49,845
– – ﹤0.01% 1799
2024
Q4 		$937K Hold
49,845
– – ﹤0.01% 1727
2024
Q3 		$965K Sell
49,845
-7,000
-12% -$171K ﹤0.01% 1686
2024
Q2 		$1.48M Sell
56,845
-604
-1% -$14.8K ﹤0.01% 1403
2024
Q1 		$1.64M Buy
57,449
+10,082
+21% +$323K ﹤0.01% 1388
2023
Q4 		$1.45M Sell
47,367
-91
-0.2% -$2.42K ﹤0.01% 1424
2023
Q3 		$1.27M Buy
47,458
+5
+0% +$153 ﹤0.01% 1433
2023
Q2 		$1.69M Sell
47,453
-594,604
-93% -$20.5M ﹤0.01% 1335
2023
Q1 		$16.3M Buy
642,057
+76,149
+13% +$2.4M 0.01% 616
2022
Q4 		$23M Sell
565,908
-3,325
-0.6% -$110K 0.02% 545
2022
Q3 		$18.8M Sell
569,233
-2,197
-0.4% -$88.7K 0.01% 559
2022
Q2 		$20.1M Sell
571,430
-160,134
-22% -$6.02M 0.01% 565
2022
Q1 		$33.6M Sell
731,564
-235,121
-24% -$11.6M 0.02% 616
2021
Q4 		$64.1M Buy
966,685
+6,453
+0.7% +$443K 0.03% 475
2021
Q3 		$59.9M Sell
960,232
-181,363
-16% -$11.7M 0.03% 497
2021
Q2 		$94.5M Buy
1,141,595
+1,282
+0.1% +$95.5K 0.04% 385
2021
Q1 		$75.6M Sell
1,140,313
-5,130
-0.4% -$398K 0.03% 440
2020
Q4 		$87.9M Sell
1,145,443
-13,019
-1% -$833K 0.04% 399
2020
Q3 		$49.9M Buy
1,158,462
+230,663
+25% +$9.95M 0.03% 503
2020
Q2 		$40.1M Buy
+927,799
New +$32.7M 0.02% 551

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
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
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
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
VPC
Vestal Point Capital New York $4.28B AUM 239% 1-Year Est. Return

Janus Henderson Group's ARWR Position: Q1 2026 in Review

Janus Henderson Group increased its Arrowhead Research (ARWR) stake by 12% in Q1 2026, buying an estimated $9.91M and bringing the position to 1,436,990 shares worth $90.1M. The position accounts for 0.04% of the portfolio, ranked #301.

Janus Henderson Group first reported a position in ARWR in Q2 2020 and has held it in 24 quarters since. The position peaked at $94.5M in Q2 2021. 438 funds tracked by Wall St. Rank hold ARWR as of Q1 2026.

  • Janus Henderson Group held 1,436,990 shares of Arrowhead Research worth $90.1M as of Q1 2026.
  • Janus Henderson Group bought 156,544 Arrowhead Research shares in Q1 2026, an estimated $9.91M.
  • Arrowhead Research made up 0.04% of Janus Henderson Group's portfolio in Q1 2026, its #301 holding.
  • Janus Henderson Group first reported a position in Arrowhead Research in Q2 2020 and has held it in 24 quarters since.
  • Janus Henderson Group's Arrowhead Research position peaked at $94.5M in Q2 2021.
  • 438 funds tracked by Wall St. Rank held Arrowhead Research as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.