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
-89,661
Closed -$212K – 11389
2026
Q1 		$212K Sell
89,661
-52,462
-37% -$134K ﹤0.01% 10015
2025
Q4 		$300K Sell
142,123
-65,116
-31% -$129K ﹤0.01% 8841
2025
Q3 		$354K Buy
207,239
+31,569
+18% +$43.7K ﹤0.01% 8580
2025
Q2 		$204K Buy
175,670
+164,866
+1,526% +$177K ﹤0.01% 8512
2025
Q1 		$11.9K Sell
10,804
-19,936
-65% -$28.5K ﹤0.01% 9190
2024
Q4 		$52.9K Sell
30,740
-456,856
-94% -$1.1M ﹤0.01% 8952
2024
Q3 		$1.21M Buy
487,596
+59,907
+14% +$163K ﹤0.01% 5503
2024
Q2 		$1.04M Sell
427,689
-172,566
-29% -$549K ﹤0.01% 5699
2024
Q1 		$2.43M Sell
600,255
-4,365
-0.7% -$16.5K ﹤0.01% 3790
2023
Q4 		$2.32M Buy
604,620
+587,832
+3,502% +$1.74M ﹤0.01% 4071
2023
Q3 		$69.7K Buy
+16,788
New +$104K ﹤0.01% 8070
2023
Q2 		– Sell
-74,541
Closed -$303K – 8583
2023
Q1 		$303K Buy
74,541
+64,343
+631% +$336K ﹤0.01% 7183
2022
Q4 		$55.1K Buy
+10,198
New +$68.5K ﹤0.01% 8332

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.