Security key
002121101
- Security type / class
- Equity / Common
- Total 13F shares
- 4,500,302
- Total 13F value
- $168,129,267
- Share change
- +512,666
- SEC-reported price per share
- $37.36
- Number of holders
- 71
- Value change
- +$21,753,036
- Number of buys
- 41
- Number of sells
- 21
- Shares outstanding
- 71,994,925
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
71
Top holders
10
ATEN full security history
Ownership snapshot
Full 13F holder table
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 (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
FIRST TRUST PORTFOLIOS LP
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 6.7%
13D/G row: FIRST TRUST PORTFOLIOS LP
Showing 1-6 of 15 holder rows.
Quick read
FIRST TRUST PORTFOLIOS LP leads the comparable SEC ownership view at 6.7%.
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 FIRST TRUST PORTFOLIOS LP's linked filing trail.
Comparable ownership
Top 5
FIRST TRUST PORTFOLIOS LP
6.7%
VANGUARD CAPITAL MANAGEMENT LLC
5.1%
Legal & General Investment Manage...
3.1%
Dhrupad Trivedi
1.2%
Peter Y. Chung
0.29%
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 |
|---|---|---|---|---|---|
| FIRST TRUST PORTFOLIOS LP |
13D/G
First Trust Portfolios L.P.
|
6.7%
|
$179,673,991
4,809,261 shares
|
$0 | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.1%
|
$84,441,384
3,652,309 shares
|
$0 | 31 Mar 2026 |
| Legal & General Investment Management Ltd |
13D/G
Legal & General Group Plc
|
3.1%
|
$46,550,093
2,405,702 shares
|
$0 | 31 Dec 2021 |
| Dhrupad Trivedi |
3/4/5
Chief Executive Officer, Director
|
1.2%
|
$20,527,022
887,847 shares
|
-$2,060,000 | 15 May 2026 |
| Peter Y. Chung |
3/4/5
Director
|
0.29%
|
$4,792,729
207,298 shares
|
— | 22 Apr 2026 |
| Tor Braham |
3/4/5
Director
|
0.27%
|
$4,457,813
192,812 shares
|
— | 22 Apr 2026 |
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 Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
71
Shares
4,500,302
Rows available
71
| 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 Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
262
Q2 2026 holders
71
Holder diff
-191
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend