Jane Street
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Jane Street’s Acumen Pharmaceuticals ABOS Stock Holding History

Jane Street’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 		– Sell
-18,900
Closed -$44.6K – 11390
2026
Q1 		$44.6K Buy
+18,900
New +$48.2K ﹤0.01% 11013
2024
Q4 		– Sell
-678,000
Closed -$1.68M – 9266
2024
Q3 		$1.68M Hold
678,000
– – ﹤0.01% 4841
2024
Q2 		$1.64M Sell
678,000
-222,200
-25% -$707K ﹤0.01% 4845
2024
Q1 		$3.65M Hold
900,200
– – ﹤0.01% 3096
2023
Q4 		$3.46M Buy
+900,200
New +$2.67M ﹤0.01% 3403

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

Jane Street's ABOS Position: Q2 2026 in Review

Jane Street sold out of Acumen Pharmaceuticals (ABOS) in Q2 2026, closing a stake of 89,661 shares — an estimated $212K sold.

Jane Street first reported a position in ABOS in Q4 2022 and held it in 13 quarters. The position peaked at $2.43M in Q1 2024. 96 funds tracked by Wall St. Rank hold ABOS as of Q2 2026.

  • Jane Street reported no remaining Acumen Pharmaceuticals position as of Q2 2026 after selling out during the quarter.
  • Jane Street sold 89,661 Acumen Pharmaceuticals shares in Q2 2026, an estimated $212K.
  • Jane Street first reported a position in Acumen Pharmaceuticals in Q4 2022 and held it in 13 quarters.
  • Jane Street's Acumen Pharmaceuticals position peaked at $2.43M in Q1 2024.
  • 96 funds tracked by Wall St. Rank held Acumen Pharmaceuticals as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.