Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share (ABOS)

Q: What does CUSIP 00509G209 represent in this 13F holders report?

CUSIP 00509G209 is the security identifier for ABOS - Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share used to aggregate holder disclosures.

Q: How many institutions held ABOS - Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share in Q2 2025?

69 institutional investors reported ABOS - Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share for Q2 2025. Use the holders table for investor-level position and value details.

CUSIP: 00509G209

Q2 2025 13F Holders as of 30 Jun 2025

Security type / class: Equity / Common Stock, $0.0001 par value per share
Total 13F shares: 37,585,884
Total 13F value: $43,599,129
Share change: -1,849,867
Put/Call ratio: 0%
SEC-reported price per share: $1.16
Number of holders: 69
Value change: -$2,103,479
Number of buys: 31
Number of sells: 47
Shares outstanding: 72,227,200

Security key

00509G209

Report period

Q2 2025

Institutions

Top holders

ABOS full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2025 Previous quarter: Q1 2025 Acumen Pharmaceuticals, Inc. SEC filings Acumen Pharmaceuticals, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 00509G209

Newer quarter: Q3 2025 Previous quarter: Q1 2025

Recent filing periods:

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024

Ownership snapshot

Top reported holders of ABOS - Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Sands Capital Alternative...

Disclosed value leader

RA CAPITAL MANAGEMENT, L.P.

Comparable rows

15/15

Latest evidence

30 Jun 2025

13D/G 13F Lead comparable stake: 5.6% 13D/G row: Sands Capital Alternatives, LLC Showing 1-6 of 15 holder rows.

Quick read

Sands Capital Alternatives, LLC leads the comparable SEC ownership view at 5.6%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Sands Capital Alternatives, LLC's linked filing trail.

Comparable ownership Top 5

Sands Capital Alternatives, LLC 5.6%

James B. Murray Jr. 5%

RA CAPITAL MANAGEMENT, L.P. 21%

FRANKLIN RESOURCES INC 4.4%

BlackRock, Inc. 3.2%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Sands Capital Alternatives, LLC	13D/G 13F Company 13D/G 13F	5.6%	$3,861,295 3,417,075 shares	$0	30 Jun 2025
James B. Murray Jr.	13D/G 13D/G	5%	$9,425,650 3,611,360 shares	$0	04 Apr 2025
RA CAPITAL MANAGEMENT, L.P.	13F Company 13F	21%	$16,425,269 14,932,063 shares	—	31 Mar 2025
FRANKLIN RESOURCES INC	13F Company 13F	4.4%	$3,456,133 3,141,939 shares	—	31 Mar 2025
BlackRock, Inc.	13F Company 13F	3.2%	$2,564,155 2,331,049 shares	—	31 Mar 2025
FMR LLC	13F Company 13F	2.8%	$2,228,185 2,025,623 shares	—	31 Mar 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q2 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

37,585,884

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q2 2025 vs Q1 2025 Across Filers

Q1 2025 holders

Q2 2025 holders

Holder diff

-10

Investor	Q1 2025 Shares	Q2 2025 Shares	Share Diff	Share Chg %	Q1 2025 value	Q2 2025 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend