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
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 $9.44B AUM 157.3% 1-Year Est. Return
SCV
Sands Capital Ventures Arlington, Virginia $421M AUM 26.25% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return
KIA
Knollwood Investment Advisory Hunt Valley, Maryland $992M AUM 28.95% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
IC
Ikarian Capital Dallas, Texas $1.23B AUM 600.17% 1-Year Est. Return
Hudson Bay Capital Management
Hudson Bay Capital Management Stamford, Connecticut $29B AUM 30.2% 1-Year Est. Return

Jane Street's ABOS Position: Q1 2026 in Review

Jane Street reduced its Acumen Pharmaceuticals (ABOS) stake by 37% in Q1 2026, selling an estimated $134K and leaving 89,661 shares worth $212K. The position accounts for ﹤0.01% of the portfolio, ranked #10015.

Jane Street first reported a position in ABOS in Q4 2022 and has held it in 13 quarters since. The position peaked at $2.43M in Q1 2024. 84 funds tracked by Wall St. Rank hold ABOS as of Q1 2026.

  • Jane Street held 89,661 shares of Acumen Pharmaceuticals worth $212K as of Q1 2026.
  • Jane Street sold 52,462 Acumen Pharmaceuticals shares in Q1 2026, an estimated $134K.
  • Acumen Pharmaceuticals made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10015 holding.
  • Jane Street first reported a position in Acumen Pharmaceuticals in Q4 2022 and has held it in 13 quarters since.
  • Jane Street's Acumen Pharmaceuticals position peaked at $2.43M in Q1 2024.
  • 84 funds tracked by Wall St. Rank held Acumen Pharmaceuticals as of Q1 2026.

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