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 		$503K Buy
+18,300
New +$498K ﹤0.01% 9917
2022
Q1 		– Sell
-1,533
Closed -$43K – 12933
2021
Q4 		$43K Sell
1,533
-600
-28% -$19.7K ﹤0.01% 12618
2021
Q3 		$89K Sell
2,133
-2,159
-50% -$90.5K ﹤0.01% 12123
2021
Q2 		$200K Sell
4,292
-958
-18% -$47.5K ﹤0.01% 11598
2021
Q1 		$290K Buy
+5,250
New +$348K ﹤0.01% 10673
2020
Q2 		– Sell
-3,242
Closed -$577K – 10085
2020
Q1 		$577K Buy
+3,242
New +$695K ﹤0.01% 6604
2019
Q2 		– Sell
-1,933
Closed -$457K – 10184
2019
Q1 		$457K Buy
+1,933
New +$489K ﹤0.01% 6450
2018
Q4 		– Sell
-1,433
Closed -$639K – 8891
2018
Q3 		$639K Sell
1,433
-625
-30% -$293K ﹤0.01% 6087
2018
Q2 		$968K Sell
2,058
-4,175
-67% -$2.21M ﹤0.01% 5420
2018
Q1 		$3.68M Buy
6,233
+525
+9% +$326K ﹤0.01% 2940
2017
Q4 		$3.1M Buy
5,708
+2,983
+109% +$1.35M ﹤0.01% 3185
2017
Q3 		$1.14M Buy
+2,725
New +$835K ﹤0.01% 5036
2017
Q2 		– Sell
-4,433
Closed -$1.36M – 9156
2017
Q1 		$1.36M Buy
4,433
+350
+9% +$85.9K ﹤0.01% 4488
2016
Q4 		$595K Buy
+4,083
New +$607K ﹤0.01% 6618
2014
Q3 		– Sell
-308
Closed -$24K – 9392
2014
Q2 		$24K Sell
308
-12
-4% -$851 ﹤0.01% 9675
2014
Q1 		$25K Buy
320
+102
+47% +$15.9K ﹤0.01% 8771
2013
Q4 		$50K Sell
218
-369
-63% -$67.2K ﹤0.01% 8796
2013
Q3 		$102K Buy
587
+350
+148% +$53.6K ﹤0.01% 8077
2013
Q2 		$34K Buy
+237
New +$37.1K ﹤0.01% 8037

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.