Jane Street
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Jane Street’s Assembly Biosciences ASMB Stock Holding History

Jane Street’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 		$957K Sell
34,499
-19,203
-36% -$548K ﹤0.01% 6601
2025
Q4 		$1.83M Buy
53,702
+19,874
+59% +$640K ﹤0.01% 4981
2025
Q3 		$866K Buy
+33,828
New +$742K ﹤0.01% 6633
2024
Q1 		– Sell
-3,742
Closed -$36.8K – 9147
2023
Q4 		$36.8K Buy
+3,742
New +$35.6K ﹤0.01% 8838
2023
Q2 		– Sell
-2,025
Closed -$20.4K – 8639
2023
Q1 		$20.4K Sell
2,025
-4,388
-68% -$74K ﹤0.01% 8639
2022
Q4 		$100K Buy
6,413
+5,480
+587% +$93.7K ﹤0.01% 8093
2022
Q3 		$18K Sell
933
-1,605
-63% -$38.8K ﹤0.01% 9223
2022
Q2 		$64K Buy
2,538
+1,456
+135% +$33.5K ﹤0.01% 8842
2022
Q1 		$27K Buy
+1,082
New +$23.2K ﹤0.01% 9858
2021
Q3 		– Sell
-3,009
Closed -$140K – 9884
2021
Q2 		$140K Buy
3,009
+1,892
+169% +$93.7K ﹤0.01% 9090
2021
Q1 		$62K Buy
1,117
+165
+17% +$10.9K ﹤0.01% 8788
2020
Q4 		$69K Buy
952
+32
+3% +$3.75K ﹤0.01% 7279
2020
Q3 		$182K Buy
+920
New +$232K ﹤0.01% 6488
2018
Q2 		– Sell
-346
Closed -$204K – 4938
2018
Q1 		$204K Buy
+346
New +$215K ﹤0.01% 4432
2014
Q3 		– Sell
-1,570
Closed -$123K – 2517
2014
Q2 		$123K Buy
+1,570
New +$111K ﹤0.01% 2328
2013
Q3 		– Sell
-234
Closed -$34K – 2690
2013
Q2 		$34K Buy
+234
New +$36.7K ﹤0.01% 2571

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
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 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

Jane Street's ASMB Position: Q1 2026 in Review

Jane Street reduced its Assembly Biosciences (ASMB) stake by 36% in Q1 2026, selling an estimated $548K and leaving 34,499 shares worth $957K. The position accounts for ﹤0.01% of the portfolio, ranked #6601.

Jane Street first reported a position in ASMB in Q2 2013 and has held it in 16 quarters since. The position peaked at $1.83M in Q4 2025. 75 funds tracked by Wall St. Rank hold ASMB as of Q1 2026.

  • Jane Street held 34,499 shares of Assembly Biosciences worth $957K as of Q1 2026.
  • Jane Street sold 19,203 Assembly Biosciences shares in Q1 2026, an estimated $548K.
  • Assembly Biosciences made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #6601 holding.
  • Jane Street first reported a position in Assembly Biosciences in Q2 2013 and has held it in 16 quarters since.
  • Jane Street's Assembly Biosciences position peaked at $1.83M in Q4 2025.
  • 75 funds tracked by Wall St. Rank held Assembly Biosciences as of Q1 2026.

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