ACM
ABOS icon

ADAR1 Capital Management’s Acumen Pharmaceuticals ABOS Stock Holding History

ADAR1 Capital Management’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 		$5.09M Buy
2,156,334
+1,265,151
+142% +$3.23M 0.3% 73
2025
Q4 		$1.88M Hold
891,183
– – 0.14% 103
2025
Q3 		$1.52M Sell
891,183
-25,000
-3% -$34.6K 0.14% 90
2025
Q2 		$1.06M Buy
916,183
+770,000
+527% +$828K 0.16% 78
2025
Q1 		$161K Buy
146,183
+51,889
+55% +$74.1K 0.03% 153
2024
Q4 		$162K Buy
+94,294
New +$227K 0.03% 165

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

ADAR1 Capital Management's ABOS Position: Q1 2026 in Review

ADAR1 Capital Management increased its Acumen Pharmaceuticals (ABOS) stake by 142% in Q1 2026, buying an estimated $3.23M and bringing the position to 2,156,334 shares worth $5.09M. The position accounts for 0.3% of the portfolio, ranked #73.

ADAR1 Capital Management first reported a position in ABOS in Q4 2024 and has held it in 6 quarters since. 84 funds tracked by Wall St. Rank hold ABOS as of Q1 2026.

  • ADAR1 Capital Management held 2,156,334 shares of Acumen Pharmaceuticals worth $5.09M as of Q1 2026.
  • ADAR1 Capital Management bought 1,265,151 Acumen Pharmaceuticals shares in Q1 2026, an estimated $3.23M.
  • Acumen Pharmaceuticals made up 0.3% of ADAR1 Capital Management's portfolio in Q1 2026, its #73 holding.
  • ADAR1 Capital Management first reported a position in Acumen Pharmaceuticals in Q4 2024 and has held it in 6 quarters since.
  • 84 funds tracked by Wall St. Rank held Acumen Pharmaceuticals as of Q1 2026.

Based on ADAR1 Capital Management's 13F filing for Q1 2026, filed 18 May 2026.