Janus Henderson Group
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Janus Henderson Group’s Assembly Biosciences ASMB Stock Holding History

Janus Henderson Group’s Portfolio ASMB Stock Details ASMB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$23.5M Buy
849,309
+11,384
+1% +$325K 0.01% 574
2025
Q4 		$28.5M Buy
837,925
+85,299
+11% +$2.75M 0.01% 524
2025
Q3 		$19.2M Buy
+752,626
New +$16.5M 0.01% 633
2019
Q4 		– Sell
-75,562
Closed -$8.91M – 1419
2019
Q3 		$8.91M Sell
75,562
-4,158
-5% -$629K ﹤0.01% 978
2019
Q2 		$12.9M Buy
79,720
+313
+0.4% +$59.5K 0.01% 895
2019
Q1 		$18.8M Sell
79,407
-118
-0.1% -$29.9K 0.01% 798
2018
Q4 		$21.6M Buy
79,525
+5,175
+7% +$1.5M 0.01% 729
2018
Q3 		$33.1M Buy
74,350
+7,231
+11% +$3.39M 0.02% 692
2018
Q2 		$31.6M Buy
67,119
+20,299
+43% +$10.7M 0.02% 694
2018
Q1 		$27.6M Buy
+46,820
New +$29M 0.02% 714

Other funds holding ASMB

GS
Gilead Sciences Foster City, California $2.12B AUM 143.53% 1-Year Est. Return
FCM
Farallon Capital Management San Francisco, California $17.5B AUM 50.95% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
CC
Commodore Capital New York $1.73B AUM 298.96% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $4.89B AUM 251.12% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PHP
Parkman Healthcare Partners Stamford, Connecticut $970M AUM 79.46% 1-Year Est. Return
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return
Blackstone Inc
Blackstone Inc New York $25.6B AUM 26.83% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

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

Janus Henderson Group increased its Assembly Biosciences (ASMB) stake by 1.4% in Q1 2026, buying an estimated $325K and bringing the position to 849,309 shares worth $23.5M. The position accounts for 0.01% of the portfolio, ranked #574.

Janus Henderson Group first reported a position in ASMB in Q1 2018 and has held it in 10 quarters since. The position peaked at $33.1M in Q3 2018. 75 funds tracked by Wall St. Rank hold ASMB as of Q1 2026.

  • Janus Henderson Group held 849,309 shares of Assembly Biosciences worth $23.5M as of Q1 2026.
  • Janus Henderson Group bought 11,384 Assembly Biosciences shares in Q1 2026, an estimated $325K.
  • Assembly Biosciences made up 0.01% of Janus Henderson Group's portfolio in Q1 2026, its #574 holding.
  • Janus Henderson Group first reported a position in Assembly Biosciences in Q1 2018 and has held it in 10 quarters since.
  • Janus Henderson Group's Assembly Biosciences position peaked at $33.1M in Q3 2018.
  • 75 funds tracked by Wall St. Rank held Assembly Biosciences as of Q1 2026.

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