A10 Networks, Inc.
ATEN- Exchange
- NYSE
- Industry
- Computer Communications Equipment
- SEC CIK
- 0001580808
In the last 90 days, A10 Networks, Inc. insiders filed 0 open-market purchases and 1 sale; 315 institutions reported holding it in 13F filings for Q2 2026, worth $2.86B in total; no superinvestor holds it.
Holders of 5% or more of ATEN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of A10 Networks, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| First Trust Portfolios LP | 13G | 6.68%4.81M shares | – | Jan 28, 20226 filings | Jul 30, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.21%3.79M shares | New | Oct 30, 20261 filing | Oct 30, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
33 Schedule 13D and 13G filings on A10 Networks, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Oct 30, 20261:39 PM ET | Vanguard Portfolio Management LLC | 13G | 5.21%3.79M shares | New | Sep 30, 2026 | SEC |
| Oct 30, 202610:49 AM ET | Vanguard Capital Management LLC | 13G/A | 4.99%3.62M shares | −0.10 ppfrom 5.09%Below 5% | Sep 30, 2026 | SEC |
| Jul 30, 202612:11 PM ET | First Trust Portfolios LPand 2 others | 13G | 6.68%4.81M shares | – | Jun 30, 2026 | SEC |
| Apr 29, 20264:39 PM ET | Vanguard Capital Management LLC | 13G | 5.09%3.65M shares | New | Mar 31, 2026 | SEC |
| Mar 26, 20263:06 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −10.05 ppfrom 10.05%Below 5% | Mar 13, 2026 | SEC |
| Jul 9, 202510:19 AM ET | Legal & General Investment Management Ltdand 4 others | 13G/A | 3.10%2.41M shares | –Below 5% | Dec 31, 2021 | SEC |
| Mar 6, 20252:09 PM ET | Vanguard Group Inc | 13G/A | 10.05%7.44M shares | – | Feb 28, 2025 | SEC |
| Nov 8, 2024 | Summit Partners L P | 13G/AOld format | – | – | – | SEC |
| Jul 8, 2024 | First Trust Portfolios LP | 13G/AOld format | – | – | – | SEC |
| Apr 8, 2024 | First Trust Portfolios LP | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 7, 2024 | Summit Partners L P | 13G/AOld format | – | – | – | SEC |
| Jan 19, 20242:40 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 12, 2024 | First Trust Portfolios LP | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 1, 2023 | Summit Partners L P | 13G/AOld format | – | – | – | SEC |
| Jan 26, 20238:52 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 20, 20239:43 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 11, 2023 | First Trust Portfolios LP | 13G/AOld format | – | – | – | SEC |
| May 9, 20223:23 PM ET | BlackRock Inc. | 13GOld format | – | – | – | SEC |
| Feb 14, 2022 | Legal & General Investment Management Ltd | 13GOld format | – | New | – | SEC |
| Feb 10, 2022 | Renaissance Technologies LLC | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2022 | Summit Partners L P | 13G/AOld format | – | – | – | SEC |
| Feb 3, 20224:41 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 28, 2022 | First Trust Portfolios LP | 13GOld format | – | New | – | SEC |
| Nov 3, 2021 | VIEX Capital Advisors, LLC | 13D/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Go ETF Solutions LLP | 13GOld format | – | New | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13GOld format | – | New | – | SEC |
| Feb 10, 2021 | Renaissance Technologies LLC | 13GOld format | – | New | – | SEC |
| Feb 8, 20213:01 PM ET | Alliancebernstein L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2021 | Summit Partners L P | 13G/AOld format | – | – | – | SEC |
| Jan 28, 20215:55 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
58 notices from officers, directors and other affiliates planning to sell A10 Networks, Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Aug 25, 20264:06 PM ET | Dana Elizabeth WolfDirector | 2.65K | $68.0K | Aug 25, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 11, 20264:09 PM ET | Robert S WeberOfficer | 14.1K | $392.5K | Aug 11, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jul 2, 20264:09 PM ET | Sheen KhouryFormer officer | 5.00K | $183.7K | Jul 2, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Jun 10, 20265:34 PM ET | Sheen KhouryFormer officer | 7.00K | $220.9K | Jun 10, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 5, 20265:19 PM ET | Eric SingerDirector | 24.7K | $672.1K | May 5, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 13, 20264:47 PM ET | Dhrupad TrivediOfficer · Director | 33.3K | $684.9K | Feb 13, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 12, 20264:01 PM ET | Dhrupad TrivediOfficer · Director | 33.3K | $685.4K | Feb 12, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 11, 20264:04 PM ET | Dhrupad TrivediOfficer · Director | 33.3K | $689.6K | Feb 11, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 13, 20255:25 PM ET | Brian BeckerOfficer | 6.40K | $115.4K | Aug 13, 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 28, 20254:11 PM ET | Robert S WeberOfficer | 2.50K | $43.7K | May 28, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Mar 4, 20255:14 PM ET | Dhrupad TrivediOfficer · Director | 26.8K | $531.0K | Mar 4, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Mar 3, 20254:38 PM ET | Dhrupad TrivediOfficer · Director | 26.8K | $552.0K | Mar 3, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 28, 20254:04 PM ET | Dhrupad TrivediOfficer · Director | 26.8K | $551.5K | Feb 28, 202510b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Feb 6, 20254:23 PM ET | Thomas Karen S.Officer | 2.69K | $56.2K | Feb 6, 2025 | Morgan Stanley Smith Barney LLC Executive Services | SEC |
| Nov 13, 20246:26 PM ET | Summit Investors I (UK), L.P.AFFILIATE SHAREHOLDER | 163 | $2.72K | Nov 13, 2024 | Merrill Lynch, Pierce,Fenner & Smith Inc. | SEC |
| Nov 13, 20246:25 PM ET | Summit Investors I, LLCAFFILIATE SHAREHOLDER | 1.84K | $30.7K | Nov 13, 2024 | Merrill Lynch, Pierce,Fenner & Smith Inc. | SEC |
| Nov 13, 20246:23 PM ET | Summit Partners Growth Equity Fund VIII-B, L.P.AFFILIATE SHAREHOLDER | 115.0K | $1.92M | Nov 13, 2024 | Merrill Lynch, Pierce,Fenner & Smith Inc. | SEC |
| Nov 13, 20246:22 PM ET | Summit Partners Growth Equity Fund VIII-A, L.P.AFFILIATE SHAREHOLDER | 314.8K | $5.25M | Nov 13, 2024 | Merrill Lynch, Pierce,Fenner & Smith Inc. | SEC |
| Nov 12, 20245:27 PM ET | Thomas Karen S.Officer | 6.16K | $102.9K | Nov 12, 2024 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES | SEC |
| May 20, 20245:13 PM ET | Summit Partners Growth Equity Fund VIII-B, L.P.Shareholder | 877.9K | $13.5M | May 20, 2024 | Morgan Stanley | SEC |
| May 20, 20245:12 PM ET | Summit Partners Growth Equity Fund VIII-A, L.P.Shareholder | 2.40M | $37.0M | May 20, 2024 | Morgan Stanley | SEC |
| May 20, 20245:12 PM ET | Summit Investors I, LLCShareholder | 14.0K | $216.4K | May 20, 2024 | Morgan Stanley | SEC |
| May 20, 20245:11 PM ET | Summit Investors I (UK), L.P.Shareholder | 1.24K | $19.0K | May 20, 2024 | Morgan Stanley | SEC |
| Apr 23, 20244:15 PM ETAmended | Dhrupad TrivediAffiliate | 21.0K | $301.3K | Mar 13, 2023 | E*TRADE Securities LLC. | SEC |
| Mar 5, 20245:25 PM ET | Dhrupad TrivediOfficer · Director | 60.6K | $804.1K | Mar 5, 202410b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
Showing the latest 25. See the ATEN notices from the last 12 months