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
- 72,713,301
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
Q3 2021
Institutions
149
Top holders
10
ATEN full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2026
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
SUMMIT PARTNERS L P
Disclosed value leader
SUMMIT PARTNERS L P
Comparable rows
0/15
Latest evidence
30 Jun 2021
13F
Highest disclosed value: $107,656,000
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
SUMMIT PARTNERS L P has the largest disclosed position value at $107.66M.
0 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 SUMMIT PARTNERS L P's linked filing trail.
Disclosed position value
Top 5
SUMMIT PARTNERS L P
$107.66M
VIEX Capital Advisors, LLC
$86.6M
VANGUARD GROUP INC
$60.54M
BlackRock Finance, Inc.
$60.32M
ALLIANCEBERNSTEIN L.P.
$36.91M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
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
|
—
denominator unverified
|
$107,656,000
9,560,941 shares
|
— | 30 Jun 2021 |
| VIEX Capital Advisors, LLC |
13F
Company
|
—
denominator unverified
|
$86,602,000
7,691,096 shares
|
— | 30 Jun 2021 |
| VANGUARD GROUP INC |
13F
Company
|
—
denominator unverified
|
$60,535,000
5,376,131 shares
|
— | 30 Jun 2021 |
| BlackRock Finance, Inc. |
13F
Company
|
—
denominator unverified
|
$60,315,000
5,356,360 shares
|
— | 30 Jun 2021 |
| ALLIANCEBERNSTEIN L.P. |
13F
Company
|
—
denominator unverified
|
$36,912,000
3,278,111 shares
|
— | 30 Jun 2021 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
—
denominator unverified
|
$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 did not pass the local price 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