Rock Springs Capital Management’s Acumen Pharmaceuticals ABOS Stock Holding History

Rock Springs 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
2025 Q1	–	Sell	-1,838,916	Closed	-$3.16M	–	97
2024 Q4	$3.16M	Sell	1,838,916 -461,143	-20%	-$1.11M	0.12%	86
2024 Q3	$5.7M	Hold	2,300,059	–	–	0.19%	83
2024 Q2	$5.57M	Hold	2,300,059	–	–	0.17%	81
2024 Q1	$9.32M	Hold	2,300,059	–	–	0.24%	80
2023 Q4	$8.83M	Sell	2,300,059 -512,520	-18%	-$1.52M	0.22%	72
2023 Q3	$11.7M	Buy	+2,812,579	New	+$17.4M	0.31%	69
2022 Q1	–	Sell	-1,571,918	Closed	-$10.6M	–	136
2021 Q4	$10.6M	Sell	1,571,918 -7,273	-0.5%	-$79.9K	0.25%	88
2021 Q3	$23.5M	Buy	+1,579,191	New	+$26.3M	0.49%	65

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

Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

KIA

Knollwood Investment Advisory Hunt Valley, Maryland $992M AUM 28.95% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

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

Rock Springs Capital Management's ABOS Position: Q1 2025 in Review

Rock Springs Capital Management sold out of Acumen Pharmaceuticals (ABOS) in Q1 2025, closing a stake of 1,838,916 shares — an estimated $3.16M sold.

Rock Springs Capital Management first reported a position in ABOS in Q3 2021 and held it in 8 quarters. The position peaked at $23.5M in Q3 2021. 81 funds tracked by Wall St. Rank hold ABOS as of Q1 2025.

Rock Springs Capital Management reported no remaining Acumen Pharmaceuticals position as of Q1 2025 after selling out during the quarter.
Rock Springs Capital Management sold 1,838,916 Acumen Pharmaceuticals shares in Q1 2025, an estimated $3.16M.
Rock Springs Capital Management first reported a position in Acumen Pharmaceuticals in Q3 2021 and held it in 8 quarters.
Rock Springs Capital Management's Acumen Pharmaceuticals position peaked at $23.5M in Q3 2021.
81 funds tracked by Wall St. Rank held Acumen Pharmaceuticals as of Q1 2025.

Based on Rock Springs Capital Management's 13F filing for Q1 2025, filed 15 May 2025.