- Type / Class
- Equity / Common Stock
- Shares outstanding
- 71,754,597
- Total 13F shares
- 43,582,177
- Share change
- +247,118
- Total reported value
- $1,007,790,079
- Price per share
- $23.12
- Number of holders
- 155
- Value change
- +$9,114,107
- Number of buys
- 80
- Number of sells
- 72
Quarterly Holders Quick Answers
What is CUSIP 002121101?
CUSIP 002121101 identifies ATEN - A10 Networks, Inc. - Common Stock in SEC institutional holdings data.
Need full ownership history?
Open the full security ownership history page.
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- Latest 13F filings for newly reported positions across managers.
- Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
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Explore More Reporting Periods
Jump to adjacent filing periods for faster comparison and easier crawl discovery.
- Previous quarter: Q4 2025
Recent filing periods for CUSIP 002121101:
Top shareholders of ATEN - A10 Networks, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
|
Company |
18%
|
12,985,049
|
$229,705,512 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
10%
|
7,241,762
|
$128,106,771 | — | 31 Dec 2025 | |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
|
Vanguard Capital Management |
5.1%
|
3,652,309
|
$84,441,384 | $0 | 31 Mar 2026 | |
| Penserra Capital Management LLC |
13F
|
Company |
5.9%
|
4,260,259
|
$75,363,000 | — | 31 Dec 2025 | |
| SUMMIT PARTNERS L P |
3/4/5
13F
|
10%+ Owner · Company |
0.26%
from 13F
|
5,388,206
|
$68,484,098 | — | 08 Sep 2022 | |
| STATE STREET CORP |
13F
|
Company |
4.3%
|
3,116,155
|
$55,124,782 | — | 31 Dec 2025 | |
| Legal & General Investment Management Ltd |
13D/G
|
Legal & General Group Plc |
3.1%
|
2,405,702
|
$46,550,093 | $0 | 31 Dec 2021 | |
| FIRST TRUST ADVISORS LP |
13F
|
Company |
3.4%
|
2,463,337
|
$43,576,431 | — | 31 Dec 2025 | |
| Boston Trust Walden Corp |
13F
|
Company |
3.4%
|
2,440,649
|
$43,175,081 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
3%
|
2,134,734
|
$37,763,444 | — | 31 Dec 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
2.8%
|
2,020,067
|
$35,734,985 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
2.6%
|
1,841,906
|
$32,583,318 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.5%
|
1,777,631
|
$31,451,945 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
2.3%
|
1,648,788
|
$29,168,131 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
2.1%
|
1,536,628
|
$27,184,000 | — | 31 Dec 2025 | |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. |
13F
|
Company |
2%
|
1,448,929
|
$25,634,840 | — | 31 Dec 2025 | |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. |
13F
|
Company |
2%
|
1,435,626
|
$25,396,224 | — | 31 Dec 2025 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
1.5%
|
1,095,287
|
$19,375,627 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.4%
|
1,034,491
|
$18,300,145 | — | 31 Dec 2025 | |
| Boston Partners |
13F
|
Company |
1.2%
|
840,140
|
$14,795,379 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
1.2%
|
836,178
|
$14,791,987 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.1%
|
804,350
|
$14,228,989 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
1%
|
733,734
|
$12,979,754 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
1%
|
728,568
|
$12,888,370 | — | 31 Dec 2025 | |
| ROYCE & ASSOCIATES LP |
13F
|
Company |
1%
|
727,410
|
$12,867,883 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.96%
|
687,726
|
$12,165,873 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.93%
|
665,653
|
$11,775,406 | — | 31 Dec 2025 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
0.87%
|
622,666
|
$11,014,962 | — | 31 Dec 2025 | |
| Defiance ETFs, LLC |
13F
|
Company |
0.78%
|
560,330
|
$10,046,717 | — | 31 Dec 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.66%
|
474,000
|
$8,385,060 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.63%
|
452,246
|
$8,000,231 | — | 31 Dec 2025 | |
| Aptus Capital Advisors, LLC |
13F
|
Company |
0.63%
|
450,385
|
$7,967,311 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.6%
|
430,199
|
$7,610,220 | — | 31 Dec 2025 | |
| PARADIGM CAPITAL MANAGEMENT INC/NY |
13F
|
Company |
0.56%
|
401,400
|
$7,100,766 | — | 31 Dec 2025 | |
| Bridge City Capital, LLC |
13F
|
Company |
0.53%
|
379,342
|
$6,710,560 | — | 31 Dec 2025 | |
| TUDOR INVESTMENT CORP ET AL |
13F
|
Company |
0.52%
|
370,444
|
$6,553,154 | — | 31 Dec 2025 | |
| Impax Asset Management Group plc |
13F
|
Company |
0.5%
|
360,000
|
$6,368,400 | — | 31 Dec 2025 | |
| RICE HALL JAMES & ASSOCIATES, LLC |
13F
|
Company |
0.44%
|
316,512
|
$5,599,097 | — | 31 Dec 2025 | |
| CRAWFORD INVESTMENT COUNSEL INC |
13F
|
Company |
0.42%
|
302,992
|
$5,359,929 | — | 31 Dec 2025 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
0.38%
|
272,093
|
$4,813,325 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.36%
|
256,125
|
$4,530,860 | — | 31 Dec 2025 | |
| PUBLIC SECTOR PENSION INVESTMENT BOARD |
13F
|
Company |
0.35%
|
248,213
|
$4,390,888 | — | 31 Dec 2025 | |
| Robert D. Cochran |
3/4/5
|
EVP Legal & Corp Collaboration |
—
class O/S missing
|
344,161
|
$4,374,286 | — | 27 Jun 2022 | |
| PEREGRINE CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.34%
|
240,813
|
$4,259,982 | — | 31 Dec 2025 | |
| Connor, Clark & Lunn Investment Management Ltd. |
13F
|
Company |
0.32%
|
229,660
|
$4,062,685 | — | 31 Dec 2025 | |
| AMERICAN CENTURY COMPANIES INC |
13F
|
Company |
0.32%
|
229,477
|
$4,059,448 | — | 31 Dec 2025 | |
| HARBOR CAPITAL ADVISORS, INC. |
13F
|
Company |
0.3%
|
217,512
|
$3,848,000 | — | 31 Dec 2025 | |
| VOYA INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.3%
|
217,066
|
$3,839,898 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.3%
|
216,998
|
$3,838,705 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.3%
|
212,072
|
$3,751,554 | — | 31 Dec 2025 |
Institutional Holders of A10 Networks, Inc. - Common Stock (ATEN) as of Q1 2026
As of 31 Mar 2026,
A10 Networks, Inc. - Common Stock (ATEN) was held by
155 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
43,582,177 shares.
The largest 10 holders included
BlackRock, Inc., Penserra Capital Management LLC, VANGUARD PORTFOLIO MANAGEMENT LLC, VANGUARD CAPITAL MANAGEMENT LLC, Boston Trust Walden Corp, FIRST TRUST ADVISORS LP, DIMENSIONAL FUND ADVISORS LP, PRUDENTIAL FINANCIAL INC, ROYCE & ASSOCIATES LP, and Boston Partners.
This page lists
155
institutional shareholders reporting positions in this security
for the Q1 2026 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
240
Q1 2026 holders
155
Holder diff
-85
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 Value $ | Q1 2026 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.