Fidelity Investments
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Fidelity Investments’s Acumen Pharmaceuticals ABOS Stock Holding History

Fidelity Investments’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 		$2.73M Sell
1,157,346
-870,151
-43% -$2.22M ﹤0.01% 2537
2025
Q4 		$4.28M Sell
2,027,497
-1,828
-0.1% -$3.63K ﹤0.01% 2337
2025
Q3 		$3.47M Sell
2,029,325
-411
-0% -$569 ﹤0.01% 2353
2025
Q2 		$2.35M Buy
2,029,736
+4,113
+0.2% +$4.42K ﹤0.01% 2438
2025
Q1 		$2.23M Buy
2,025,623
+1,863
+0.1% +$2.66K ﹤0.01% 2409
2024
Q4 		$3.48M Sell
2,023,760
-4,357
-0.2% -$10.5K ﹤0.01% 2273
2024
Q3 		$5.03M Buy
2,028,117
+6,014
+0.3% +$16.3K ﹤0.01% 2125
2024
Q2 		$4.89M Sell
2,022,103
-66,897
-3% -$213K ﹤0.01% 2085
2024
Q1 		$8.46M Buy
+2,089,000
New +$7.87M ﹤0.01% 1927
2023
Q4 		– Sell
-657
Closed -$2.73K – 5418
2023
Q3 		$2.73K Buy
657
+180
+38% +$1.11K ﹤0.01% 4466
2023
Q2 		$2.29K Sell
477
-202
-30% -$967 ﹤0.01% 4558
2023
Q1 		$2.76K Sell
679
-220
-24% -$1.15K ﹤0.01% 4547
2022
Q4 		$4.86K Hold
899
– – ﹤0.01% 4265
2022
Q3 		$9K Hold
899
– – ﹤0.01% 4108
2022
Q2 		$4K Sell
899
-939
-51% -$3.53K ﹤0.01% 4353
2022
Q1 		$7K Sell
1,838
-11,462
-86% -$62.4K ﹤0.01% 4322
2021
Q4 		$90K Sell
13,300
-93,800
-88% -$1.03M ﹤0.01% 3109
2021
Q3 		$1.59M Buy
+107,100
New +$1.78M ﹤0.01% 2619

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
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
Pathstone Holdings
Pathstone Holdings Englewood, New Jersey $25.1B AUM 22.95% 1-Year Est. Return

Fidelity Investments's ABOS Position: Q1 2026 in Review

Fidelity Investments reduced its Acumen Pharmaceuticals (ABOS) stake by 43% in Q1 2026, selling an estimated $2.22M and leaving 1,157,346 shares worth $2.73M. The position accounts for ﹤0.01% of the portfolio, ranked #2537.

Fidelity Investments first reported a position in ABOS in Q3 2021 and has held it in 18 quarters since. The position peaked at $8.46M in Q1 2024. 84 funds tracked by Wall St. Rank hold ABOS as of Q1 2026.

  • Fidelity Investments held 1,157,346 shares of Acumen Pharmaceuticals worth $2.73M as of Q1 2026.
  • Fidelity Investments sold 870,151 Acumen Pharmaceuticals shares in Q1 2026, an estimated $2.22M.
  • Acumen Pharmaceuticals made up ﹤0.01% of Fidelity Investments's portfolio in Q1 2026, its #2537 holding.
  • Fidelity Investments first reported a position in Acumen Pharmaceuticals in Q3 2021 and has held it in 18 quarters since.
  • Fidelity Investments's Acumen Pharmaceuticals position peaked at $8.46M in Q1 2024.
  • 84 funds tracked by Wall St. Rank held Acumen Pharmaceuticals as of Q1 2026.

Based on Fidelity Investments's 13F filing for Q1 2026, filed 15 May 2026.