JY
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Jeff Yass’s Assembly Biosciences ASMB Stock Holding History

Jeff Yass’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
Q2 		$239K Buy
+8,700
New +$237K ﹤0.01% 11571
2025
Q4 		– Sell
-95,000
Closed -$2.43M – 12286
2025
Q3 		$2.43M Buy
+95,000
New +$2.08M ﹤0.01% 5375
2022
Q4 		– Sell
-1,792
Closed -$35K – 12354
2022
Q3 		$35K Sell
1,792
-1,550
-46% -$37.5K ﹤0.01% 12394
2022
Q2 		$84K Buy
+3,342
New +$76.9K ﹤0.01% 11626
2022
Q1 		– Sell
-1,017
Closed -$28K – 12932
2021
Q4 		$28K Sell
1,017
-541
-35% -$17.7K ﹤0.01% 12756
2021
Q3 		$65K Buy
+1,558
New +$65.3K ﹤0.01% 12256
2021
Q2 		– Sell
-2,033
Closed -$112K – 12521
2021
Q1 		$112K Buy
+2,033
New +$135K ﹤0.01% 11798
2020
Q3 		– Sell
-1,033
Closed -$289K – 10513
2020
Q2 		$289K Sell
1,033
-3,725
-78% -$869K ﹤0.01% 8420
2020
Q1 		$847K Sell
4,758
-1,250
-21% -$268K ﹤0.01% 5770
2019
Q4 		$1.48M Buy
+6,008
New +$1.11M ﹤0.01% 4830
2019
Q3 		– Sell
-958
Closed -$155K – 10124
2019
Q2 		$155K Sell
958
-11,675
-92% -$2.22M ﹤0.01% 9343
2019
Q1 		$2.98M Buy
+12,633
New +$3.2M ﹤0.01% 3134
2018
Q4 		– Sell
-742
Closed -$331K – 8890
2018
Q3 		$331K Sell
742
-116
-14% -$54.3K ﹤0.01% 7297
2018
Q2 		$404K Sell
858
-16,142
-95% -$8.54M ﹤0.01% 7230
2018
Q1 		$10M Buy
17,000
+10,958
+181% +$6.79M ﹤0.01% 1773
2017
Q4 		$3.28M Buy
+6,042
New +$2.73M ﹤0.01% 3090
2014
Q1 		– Sell
-393
Closed -$90K – 8858
2013
Q4 		$90K Buy
+393
New +$71.5K ﹤0.01% 8670

Other funds holding ASMB

GS
Gilead Sciences Foster City, California $1.65B AUM 166.99% 1-Year Est. Return
FCM
Farallon Capital Management San Francisco, California $21.7B AUM 79.24% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $5.34B AUM 380.18% 1-Year Est. Return
CC
Commodore Capital New York $1.68B AUM 375.52% 1-Year Est. Return
RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
PHP
Parkman Healthcare Partners Stamford, Connecticut $977M AUM 110.37% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $90.7B AUM 77.13% 1-Year Est. Return

Jeff Yass's ASMB Position: Q2 2026 in Review

Jeff Yass sold out of Assembly Biosciences (ASMB) in Q2 2026, closing a stake of 32,949 shares — an estimated $897K sold.

Jeff Yass first reported a position in ASMB in Q3 2013 and held it in 37 quarters. The position peaked at $4.5M in Q2 2018. 92 funds tracked by Wall St. Rank hold ASMB as of Q2 2026.

  • Jeff Yass reported no remaining Assembly Biosciences position as of Q2 2026 after selling out during the quarter.
  • Jeff Yass sold 32,949 Assembly Biosciences shares in Q2 2026, an estimated $897K.
  • Jeff Yass first reported a position in Assembly Biosciences in Q3 2013 and held it in 37 quarters.
  • Jeff Yass's Assembly Biosciences position peaked at $4.5M in Q2 2018.
  • 92 funds tracked by Wall St. Rank held Assembly Biosciences as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.