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 Q4 2021?

50 institutional investors reported ABOS - Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share for Q4 2021. Use the holders table for investor-level position and value details.

CUSIP: 00509G209

Q4 2021 13F Holders as of 31 Dec 2021

Type / Class: Equity / Common Stock, $0.0001 par value per share
Shares outstanding: 72,227,200
Total 13F shares: 25,569,796
Share change: -246,715
Total reported value: $172,840,000
Price per share: $6.76
Number of holders: 50
Value change: -$1,670,403
Number of buys: 32
Number of sells: 7

Quarterly Holders Quick Answers

What is CUSIP 00509G209?
CUSIP 00509G209 identifies ABOS - Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share in SEC institutional holdings data.

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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2022
Previous quarter: Q3 2021

Recent filing periods for CUSIP 00509G209:

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

Top shareholders 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. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
RA CAPITAL MANAGEMENT, L.P.	13F	Company	14%	9,770,773	$145,194,000	—	30 Sep 2021	13F
Sands Capital Alternatives, LLC	13F	Company	4.7%	3,417,075	$50,778,000	—	30 Sep 2021	13F
BlackRock Finance, Inc.	13F	Company	4%	2,868,791	$42,629,000	—	30 Sep 2021	13F
Rock Springs Capital Management LP	13F	Company	2.2%	1,579,191	$23,467,000	—	30 Sep 2021	13F
VANGUARD GROUP INC	13F	Company	1.8%	1,324,898	$19,688,000	—	30 Sep 2021	13F
FRANKLIN RESOURCES INC	13F	Company	1.3%	937,500	$13,931,000	—	30 Sep 2021	13F
JANUS HENDERSON GROUP PLC	13F	Company	1.2%	860,181	$12,773,000	—	30 Sep 2021	13F
Sands Capital Ventures Discovery Fund III, L.P.	3/4/5	10%+ Owner	— class O/S missing	3,417,075	$11,859,300	—	06 Jul 2021	3/4/5
Laurion Capital Management LP	13F	Company	0.91%	656,848	$9,761,000	—	30 Sep 2021	13F
GUARDIAN POINT CAPITAL, LP	13F	Company	0.69%	500,000	$7,430,000	—	30 Sep 2021	13F
Woodline Partners LP	13F	Company	0.65%	468,794	$6,966,000	—	30 Sep 2021	13F
MOORE CAPITAL MANAGEMENT, LP	13F	Company	0.51%	369,583	$5,492,000	—	30 Sep 2021	13F
BVF INC/IL	13F	Company	0.4%	289,663	$4,304,000	—	30 Sep 2021	13F
MARSHALL WACE, LLP	13F	Company	0.22%	156,250	$2,322,000	—	30 Sep 2021	13F
Marshall Wace North America L.P.	13F	Company	0.21%	153,908	$2,287,000	—	30 Sep 2021	13F
Paul B. Manning	3/4/5	10%+ Owner	— class O/S missing	657,985	$2,283,603	—	06 Jul 2021	3/4/5
Robert D. Hardie	3/4/5	10%+ Owner	— class O/S missing	657,985	$2,283,603	—	06 Jul 2021	3/4/5
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.15%	107,806	$1,601,000	—	30 Sep 2021	13F
FMR LLC	13F	Company	0.15%	107,100	$1,592,000	—	30 Sep 2021	13F
STATE STREET CORP	13F	Company	0.14%	99,775	$1,483,000	—	30 Sep 2021	13F
NORTHERN TRUST CORP	13F	Company	0.12%	87,401	$1,299,000	—	30 Sep 2021	13F
PURA VIDA INVESTMENTS, LLC	13F	Company	0.1%	75,000	$1,115,000	—	30 Sep 2021	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.09%	63,635	$946,000	—	30 Sep 2021	13F
CITADEL ADVISORS LLC	13F	Company	0.05%	39,346	$585,000	—	30 Sep 2021	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.03%	24,037	$358,000	—	30 Sep 2021	13F
D. E. Shaw & Co., Inc.	13F	Company	0.03%	18,314	$272,000	—	30 Sep 2021	13F
Bank of New York Mellon Corp	13F	Company	0.02%	17,945	$266,000	—	30 Sep 2021	13F
Chicago Partners Investment Group LLC	13F	Company	0.02%	14,804	$199,000	—	30 Sep 2021	13F
Nuveen Asset Management, LLC	13F	Company	0.02%	12,922	$192,000	—	30 Sep 2021	13F
DEUTSCHE BANK AG\	13F	Company	0.01%	5,518	$82,000	—	30 Sep 2021	13F
AMERICAN INTERNATIONAL GROUP, INC.	13F	Company	0.01%	5,247	$78,000	—	30 Sep 2021	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.01%	5,180	$77,000	—	30 Sep 2021	13F
JPMORGAN CHASE & CO	13F	Company	0.01%	3,672	$55,000	—	30 Sep 2021	13F
STRS OHIO	13F	Company	0%	2,200	$32,000	—	30 Sep 2021	13F
ROYAL BANK OF CANADA	13F	Company	0%	1,101	$16,000	—	30 Sep 2021	13F
CITIGROUP INC	13F	Company	0%	1,094	$16,000	—	30 Sep 2021	13F
BANK OF AMERICA CORP /DE/	13F	Company	0%	987	$14,000	—	30 Sep 2021	13F
Legal & General Group Plc	13F	Company	0%	888	$13,000	—	30 Sep 2021	13F
Ameritas Investment Partners, Inc.	13F	Company	0%	735	$11,000	—	30 Sep 2021	13F
Tower Research Capital LLC (TRC)	13F	Company	0%	695	$10,000	—	30 Sep 2021	13F
UBS Group AG	13F	Company	0%	610	$9,000	—	30 Sep 2021	13F
MORGAN STANLEY	13F	Company	0%	563	$8,000	—	30 Sep 2021	13F
CAPTRUST FINANCIAL ADVISORS	13F	Company	0%	78	$1,000	—	30 Sep 2021	13F
WELLS FARGO & COMPANY/MN	13F	Company	0%	51	$1,000	—	30 Sep 2021	13F

Institutional Holders of Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share (ABOS) as of Q4 2021

As of 31 Dec 2021, Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share (ABOS) was held by 50 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 25,569,796 shares. The largest 10 holders included RA CAPITAL MANAGEMENT, L.P., Sands Capital Ventures, LLC, BlackRock Inc., Deep Track Capital, LP, Rock Springs Capital Management LP, Laurion Capital Management LP, JANUS HENDERSON GROUP PLC, FRANKLIN RESOURCES INC, VANGUARD GROUP INC, and GUARDIAN POINT CAPITAL, LP. This page lists 50 institutional shareholders reporting positions in this security for the Q4 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2021 vs Q3 2021 Across Filers

Q3 2021 holders

Q4 2021 holders

Holder diff

Investor	Q3 2021 Shares	Q4 2021 Shares	Share Diff	Share Chg %	Q3 2021 Value $	Q4 2021 Value $	Value Diff $	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.