Security key
00509G209
Acumen Pharmaceuticals, Inc. - Common Stock, $0.0001 par value per share (ABOS)
CUSIP: 00509G209
Q4 2021 13F Holders as of 31 Dec 2021
- Security type / class
- Equity / Common Stock, $0.0001 par value per share
- Total 13F shares
- 25,569,796
- Total 13F value
- $172,840,000
- Share change
- -246,715
- SEC-reported price per share
- $6.76
- Number of holders
- 50
- Value change
- -$1,670,403
- Number of buys
- 32
- Number of sells
- 7
- Shares outstanding
- 72,227,200
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2021
Institutions
50
Top holders
10
ABOS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2022
Previous quarter: Q3 2021
Acumen Pharmaceuticals, Inc. SEC filings
Acumen Pharmaceuticals, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 00509G209
Recent filing periods:
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
RA CAPITAL MANAGEMENT, L.P.
Disclosed value leader
RA CAPITAL MANAGEMENT, L.P.
Comparable rows
15/15
Latest evidence
30 Sep 2021
13F
Lead comparable stake: 14%
Showing 1-6 of 15 holder rows.
Quick read
RA CAPITAL MANAGEMENT, L.P. leads the comparable SEC ownership view at 14%.
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 RA CAPITAL MANAGEMENT, L.P.'s linked filing trail.
Comparable ownership
Top 5
RA CAPITAL MANAGEMENT, L.P.
14%
Sands Capital Alternatives, LLC
4.7%
BlackRock Finance, Inc.
4%
Rock Springs Capital Management LP
2.2%
VANGUARD GROUP INC
1.8%
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 |
|---|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. |
13F
Company
|
14%
|
$145,194,000
9,770,773 shares
|
— | 30 Sep 2021 |
| Sands Capital Alternatives, LLC |
13F
Company
|
4.7%
|
$50,778,000
3,417,075 shares
|
— | 30 Sep 2021 |
| BlackRock Finance, Inc. |
13F
Company
|
4%
|
$42,629,000
2,868,791 shares
|
— | 30 Sep 2021 |
| Rock Springs Capital Management LP |
13F
Company
|
2.2%
|
$23,467,000
1,579,191 shares
|
— | 30 Sep 2021 |
| VANGUARD GROUP INC |
13F
Company
|
1.8%
|
$19,688,000
1,324,898 shares
|
— | 30 Sep 2021 |
| FRANKLIN RESOURCES INC |
13F
Company
|
1.3%
|
$13,931,000
937,500 shares
|
— | 30 Sep 2021 |
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 Q4 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
50
Shares
25,569,796
Rows available
50
| 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 Q4 2021 vs Q3 2021 Across Filers
Q3 2021 holders
40
Q4 2021 holders
50
Holder diff
10
| Investor | Q3 2021 Shares | Q4 2021 Shares | Share Diff | Share Chg % | Q3 2021 value | Q4 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend