JY
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Jeff Yass’s Acumen Pharmaceuticals ABOS Stock Holding History

Jeff Yass’s Portfolio ABOS Stock Details ABOS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$337K Sell
126,104
-475,372
-79% -$1.17M ﹤0.01% 10790
2026
Q1 		$1.42M Buy
601,476
+228,278
+61% +$582K ﹤0.01% 7029
2025
Q4 		$787K Buy
373,198
+158,758
+74% +$315K ﹤0.01% 7723
2025
Q3 		$367K Buy
214,440
+62,102
+41% +$85.9K ﹤0.01% 9665
2025
Q2 		$177K Buy
152,338
+41,362
+37% +$44.5K ﹤0.01% 11342
2025
Q1 		$122K Buy
110,976
+35,088
+46% +$50.1K ﹤0.01% 11397
2024
Q4 		$131K Buy
75,888
+21,869
+40% +$52.7K ﹤0.01% 11125
2024
Q3 		$134K Sell
54,019
-61
-0.1% -$165 ﹤0.01% 10844
2024
Q2 		$131K Sell
54,080
-211,763
-80% -$674K ﹤0.01% 10830
2024
Q1 		$1.08M Sell
265,843
-233,951
-47% -$882K ﹤0.01% 6713
2023
Q4 		$1.92M Buy
499,794
+322,015
+181% +$956K ﹤0.01% 5447
2023
Q3 		$738K Buy
+177,779
New +$1.1M ﹤0.01% 7324
2023
Q2 		– Sell
-129,794
Closed -$621K – 11940
2023
Q1 		$527K Buy
129,794
+40,233
+45% +$210K ﹤0.01% 8433
2022
Q4 		$484K Buy
89,561
+62,561
+232% +$420K ﹤0.01% 7954
2022
Q3 		$271K Buy
27,000
+826
+3% +$4.74K ﹤0.01% 10052
2022
Q2 		$123K Buy
+26,174
New +$98.3K ﹤0.01% 11250

Other funds holding ABOS

RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
SCV
Sands Capital Ventures Arlington, Virginia $614M AUM 19.92% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
KIA
Knollwood Investment Advisory Hunt Valley, Maryland $1.12B AUM 41.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
IC
Ikarian Capital Dallas, Texas $928M AUM 596.14% 1-Year Est. Return

Jeff Yass's ABOS Position: Q2 2026 in Review

Jeff Yass reduced its Acumen Pharmaceuticals (ABOS) stake by 79% in Q2 2026, selling an estimated $1.17M and leaving 126,104 shares worth $337K. The position accounts for ﹤0.01% of the portfolio, ranked #10790.

Jeff Yass first reported a position in ABOS in Q2 2022 and has held it in 16 quarters since. The position peaked at $1.92M in Q4 2023. 96 funds tracked by Wall St. Rank hold ABOS as of Q2 2026.

  • Jeff Yass held 126,104 shares of Acumen Pharmaceuticals worth $337K as of Q2 2026.
  • Jeff Yass sold 475,372 Acumen Pharmaceuticals shares in Q2 2026, an estimated $1.17M.
  • Acumen Pharmaceuticals made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #10790 holding.
  • Jeff Yass first reported a position in Acumen Pharmaceuticals in Q2 2022 and has held it in 16 quarters since.
  • Jeff Yass's Acumen Pharmaceuticals position peaked at $1.92M in Q4 2023.
  • 96 funds tracked by Wall St. Rank held Acumen Pharmaceuticals as of Q2 2026.

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