Security key
002121101
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 62,784,683
- Total 13F value
- $618,930,554
- Share change
- +2,957,962
- Put/Call ratio
- 39%
- SEC-reported price per share
- $9.86
- Number of holders
- 144
- Value change
- +$35,638,570
- Number of buys
- 84
- Number of sells
- 63
- 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
Q4 2020
Institutions
144
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 Sep 2020
13F
Highest disclosed value: $60,764,000
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 $60.76M.
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
$60.76M
VIEX Capital Advisors, LLC
$48.99M
BlackRock Finance, Inc.
$35.24M
VANGUARD GROUP INC
$25.64M
RENAISSANCE TECHNOLOGIES LLC
$23.26M
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
|
$60,764,000
9,539,076 shares
|
— | 30 Sep 2020 |
| VIEX Capital Advisors, LLC |
13F
Company
|
—
denominator unverified
|
$48,992,000
7,691,096 shares
|
— | 30 Sep 2020 |
| BlackRock Finance, Inc. |
13F
Company
|
—
denominator unverified
|
$35,235,000
5,531,077 shares
|
— | 30 Sep 2020 |
| VANGUARD GROUP INC |
13F
Company
|
—
denominator unverified
|
$25,642,000
4,025,309 shares
|
— | 30 Sep 2020 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
—
denominator unverified
|
$23,265,000
3,652,347 shares
|
— | 30 Sep 2020 |
| Legal & General Group Plc |
13F
Company
|
—
denominator unverified
|
$21,326,000
3,347,854 shares
|
— | 30 Sep 2020 |
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 2020
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
144
Shares
62,784,683
Rows available
144
| 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 2020 vs Q3 2020 Across Filers
Q3 2020 holders
141
Q4 2020 holders
144
Holder diff
3
| Investor | Q3 2020 Shares | Q4 2020 Shares | Share Diff | Share Chg % | Q3 2020 value | Q4 2020 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend