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 		$138K Buy
+58,300
New +$149K ﹤0.01% 4725
2025
Q4 		– Sell
-2,000
Closed -$3K – 8350
2025
Q3 		$3K Hold
2,000
– – ﹤0.01% 8462
2025
Q2 		$2K Sell
2,000
-3,300
-62% -$3.55K ﹤0.01% 8067
2025
Q1 		$5K Buy
5,300
+2,900
+121% +$4.14K ﹤0.01% 7507
2024
Q4 		$4K Buy
2,400
+400
+20% +$963 ﹤0.01% 7692
2024
Q3 		$4K Sell
2,000
-200
-9% -$543 ﹤0.01% 7675
2024
Q2 		$5K Buy
2,200
+800
+57% +$2.55K ﹤0.01% 7819
2024
Q1 		$5K Sell
1,400
-17,700
-93% -$66.7K ﹤0.01% 7968
2023
Q4 		$73K Sell
19,100
-7,300
-28% -$21.7K ﹤0.01% 5694
2023
Q3 		$109K Buy
+26,400
New +$163K ﹤0.01% 4991
2023
Q1 		– Sell
-900
Closed -$4K – 8870
2022
Q4 		$4K Sell
900
-3,000
-77% -$20.2K ﹤0.01% 8155
2022
Q3 		$39K Sell
3,900
-3,600
-48% -$20.6K ﹤0.01% 6753
2022
Q2 		$35K Buy
+7,500
New +$28.2K ﹤0.01% 6932

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.