Simplex Trading
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Simplex Trading’s Acumen Pharmaceuticals ABOS Stock Holding History

Simplex Trading’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 		$41.1K Buy
+17,414
New +$44.4K ﹤0.01% 6079
2025
Q2 		– Sell
-2,343
Closed -$2.52K – 8482
2025
Q1 		$2K Buy
2,343
+1,152
+97% +$1.65K ﹤0.01% 7911
2024
Q4 		$2K Buy
+1,191
New +$2.87K ﹤0.01% 7957
2024
Q1 		– Sell
-21,422
Closed -$80.7K – 8708
2023
Q4 		$82K Buy
21,422
+9,974
+87% +$29.6K ﹤0.01% 5577
2023
Q3 		$47K Buy
11,448
+6,902
+152% +$42.6K ﹤0.01% 5855
2023
Q2 		$21K Buy
+4,546
New +$21.8K ﹤0.01% 6700
2022
Q3 		– Sell
-2,672
Closed -$15.3K – 9778
2022
Q2 		$12K Buy
+2,672
New +$10K ﹤0.01% 8095

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

Simplex Trading's ABOS Position: Q1 2026 in Review

Simplex Trading opened a new position in Acumen Pharmaceuticals (ABOS) in Q1 2026: 17,414 shares worth $41.1K. The stake represents ﹤0.01% of the portfolio and ranks #6079 among its holdings. This is a return to the name: Simplex Trading previously reported a position in ABOS as recently as Q1 2025.

Simplex Trading first reported a position in ABOS in Q2 2022 and has held it in 7 quarters since. The position peaked at $82K in Q4 2023. 84 funds tracked by Wall St. Rank hold ABOS as of Q1 2026.

  • Simplex Trading held 17,414 shares of Acumen Pharmaceuticals worth $41.1K as of Q1 2026.
  • Acumen Pharmaceuticals was a new Simplex Trading position in Q1 2026.
  • Acumen Pharmaceuticals made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #6079 holding.
  • Simplex Trading first reported a position in Acumen Pharmaceuticals in Q2 2022 and has held it in 7 quarters since.
  • Simplex Trading's Acumen Pharmaceuticals position peaked at $82K in Q4 2023.
  • 84 funds tracked by Wall St. Rank held Acumen Pharmaceuticals as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.