Security key
002121101
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 64,752,279
- Total 13F value
- $1,072,853,997
- Share change
- -3,211,041
- Put/Call ratio
- 73%
- SEC-reported price per share
- $16.58
- Number of holders
- 174
- Value change
- -$50,652,948
- Number of buys
- 97
- Number of sells
- 71
- Shares outstanding
- 71,754,597
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2021
Institutions
174
Top holders
10
ATEN full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2022
Previous quarter: Q3 2021
A10 Networks, Inc. SEC filings
A10 Networks, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 002121101
Recent filing periods:
Ownership snapshot
Top reported holders of ATEN - A10 Networks, Inc. - Common Stock (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
Legal & General Investmen...
Disclosed value leader
SUMMIT PARTNERS L P
Comparable rows
15/15
Latest evidence
31 Dec 2021
13D/G
13F
Lead comparable stake: 3.1%
13D/G row: Legal & General Investment Management Ltd
Showing 1-6 of 15 holder rows.
Quick read
Legal & General Investment Management Ltd leads the comparable SEC ownership view at 3.1%.
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 Legal & General Investment Management Ltd's linked filing trail.
Comparable ownership
Top 5
Legal & General Investment Manage...
3.1%
SUMMIT PARTNERS L P
13%
VIEX Capital Advisors, LLC
11%
VANGUARD GROUP INC
7.6%
BlackRock Finance, Inc.
6.3%
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 |
|---|---|---|---|---|---|
| Legal & General Investment Management Ltd |
13D/G
Legal & General Group Plc
|
3.1%
|
$46,550,093
2,405,702 shares
|
$0 | 31 Dec 2021 |
| SUMMIT PARTNERS L P |
13F
Company
|
13%
|
$128,881,000
9,560,941 shares
|
— | 30 Sep 2021 |
| VIEX Capital Advisors, LLC |
13F
Company
|
11%
|
$103,676,000
7,691,096 shares
|
— | 30 Sep 2021 |
| VANGUARD GROUP INC |
13F
Company
|
7.6%
|
$73,820,000
5,476,226 shares
|
— | 30 Sep 2021 |
| BlackRock Finance, Inc. |
13F
Company
|
6.3%
|
$61,258,000
4,544,300 shares
|
— | 30 Sep 2021 |
| ALLIANCEBERNSTEIN L.P. |
13F
Company
|
5.3%
|
$50,810,000
3,769,272 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
174
Shares
64,752,279
Rows available
174
| 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
149
Q4 2021 holders
174
Holder diff
25
| 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