Security key
002121101
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 67,225,746
- Total 13F value
- $905,996,390
- Share change
- +1,092,132
- Put/Call ratio
- 43%
- SEC-reported price per share
- $13.48
- Number of holders
- 149
- Value change
- +$14,969,942
- Number of buys
- 77
- Number of sells
- 61
- Shares outstanding
- 71,754,597
Holder snapshot
7 facts
Show 1 more fact
Security identity
1 fact
Report period
Q3 2021
Institutions
149
Top holders
10
ATEN full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2021
Previous quarter: Q2 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.
Largest current holder
SUMMIT PARTNERS L P
13D/G signal
—
Evidence rows
15
Latest as of
30 Jun 2021
13F
Lead comparable stake: 13%
Showing 1-6 of 15 holder rows.
Quick read
SUMMIT PARTNERS L P leads the comparable SEC ownership view at 13%.
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.
Comparable ownership
Top 5
SUMMIT PARTNERS L P
13%
VIEX Capital Advisors, LLC
11%
VANGUARD GROUP INC
7.5%
BlackRock Finance, Inc.
7.5%
ALLIANCEBERNSTEIN L.P.
4.6%
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 |
|---|---|---|---|---|---|
| SUMMIT PARTNERS L P |
13F
Company
|
13%
|
$107,656,000
9,560,941 shares
|
— | 30 Jun 2021 |
| VIEX Capital Advisors, LLC |
13F
Company
|
11%
|
$86,602,000
7,691,096 shares
|
— | 30 Jun 2021 |
| VANGUARD GROUP INC |
13F
Company
|
7.5%
|
$60,535,000
5,376,131 shares
|
— | 30 Jun 2021 |
| BlackRock Finance, Inc. |
13F
Company
|
7.5%
|
$60,315,000
5,356,360 shares
|
— | 30 Jun 2021 |
| ALLIANCEBERNSTEIN L.P. |
13F
Company
|
4.6%
|
$36,912,000
3,278,111 shares
|
— | 30 Jun 2021 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
4.3%
|
$34,542,000
3,067,633 shares
|
— | 30 Jun 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 Q3 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
149
Shares
67,225,746
Rows available
149
| 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 failed the local validity check.
Compare Q3 2021 vs Q2 2021 Across Filers
Q2 2021 holders
132
Q3 2021 holders
149
Holder diff
17
| Investor | Q2 2021 Shares | Q3 2021 Shares | Share Diff | Share Chg % | Q2 2021 value | Q3 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend