A10 Networks, Inc.
A maker of networking and security equipment that keeps websites, applications, and telecommunication networks fast and safe. Its Thunder application-delivery controllers and A10 Defend suite guard customer-facing apps from slowdowns and attacks, serving enterprises, cloud providers, and carriers. Founded in 2004 in San Jose by Lee Chen, a co-founder of the earlier networking firm Foundry, the company began in identity management before growing into network hardware. Its name joins the "A" of Application with the ten letters of "Networking."
Sold 700.0K
Granted 30.1K
Granted 305.8K · Bought 293.0K · Sold 3.40M
Granted 160.4K
Granted 16.9K · Sold 2.50M
Granted 1.78M · Sold 688.5K
Sold 918.5K
Granted 124.8K
Granted 533.8K · Sold 282.6K
Granted 10.3K · Sold 29.9K
Granted 269.3K · Sold 56.1K
Granted 207.3K · Sold 5.60M
Granted 167.7K
Granted 111.2K · Bought 25.0K
Granted 107.9K · Sold 33.2K
Granted 97.9K · Sold 76.0K
Granted 136.5K · Sold 19.8K
Granted 120.4K · Sold 18.5K
Granted 95.0K
Granted 121.2K · Sold 32.6K
Granted 233.9K · Sold 148.6K
Granted 174.2K · Sold 110.8K
Granted 35.0K · Sold 5.2K
Granted 73.0K · Sold 24.7K
Granted 60.0K · Sold 6.3K
Granted 96.8K · Sold 11.1K
Granted 60.1K
Sold 60.5K
Granted 42.8K
Granted 37.2K
Granted 36.4K
Granted 33.6K · Sold 6.2K
Granted 27.9K
Sold 13.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Mannion Martin J +4 co-filersManager of GP of 10% owner, GP of 10% owner, Manager of GP of 10% Owner · 1 transaction | — | 9.43Mas of Mar 2014 | — | — | — |
| Summit Investors I (UK), L.P. +3 co-filers10% owner · 1 transaction | — | 9.43Mas of Mar 2014 | — | — | — |
| Mannion Martin J +8 co-filersDirector, 10% owner, Manager of GP of 10% owner, Manager and GP of 10% Owner · 1 transaction | — | 8.88Mas of Dec 2021 | — | — | 700.0K |
| Singer Eric +8 co-filersDirector, 10% owner, 10% owner · 13 transactions | — | 8.26Mas of Sep 2020 | 30.1K | — | — |
| Chen Lee10% owner · 71 transactions | — | 7.67Mas of May 2020 | 305.8K | 293.0K | 3.40M |
| Mannion Martin J +9 co-filersManager of GP of 10% owner, Manager of Manager of 10% owne, 10% owner, Manager of GP of 10% Owner · 9 transactions | — | 5.39Mas of Sep 2022 | 160.4K | — | — |
| Singer Eric +4 co-filersDirector, See Explanation of Responses · 12 transactions | — | 2.17Mas of Nov 2021 | 16.9K | — | 2.50M |
| Singer Eric +3 co-filersDirector, See Explanation of Responses · 2 transactions | — | 1.08Mas of Dec 2021 | — | — | — |
| Trivedi DhrupadChief Executive Officer, Director · 78 transactions | — | 887.8K | 1.78M | — | 688.5K |
| Singer Eric +2 co-filersDirector, See Explanation of Responses · 14 transactions | — | 540.4Kas of May 2022 | — | — | 918.5K |
| Jalan RajkumarChief Technology Officer · 2 transactions | — | 425.1Kas of Mar 2017 | 124.8K | — | — |
| Cochran Robert DEVP Legal & Corp Collaboration · 71 transactions | — | 344.2Kas of Jun 2022 | 533.8K | — | 282.6K |
| Singer Eric +1 co-filerDirector, See Explanation of Responses · 5 transactions | — | 244.3Kas of Aug 2022 | 10.3K | — | 29.9K |
| Constantino ThomasEVP, Chief Financial Officer · 10 transactions | — | 213.3Kas of Jul 2020 | 269.3K | — | 56.1K |
| Chung Peter YDirector · 20 transactions | — | 207.3K | 207.3K | — | 5.60M |
| Braham TorDirector · 10 transactions | — | 192.8K | 167.7K | — | — |
| Salsbury Phillip JDirector · 7 transactions | — | 176.2Kas of Dec 2019 | 111.2K | 25.0K | — |
| Smets Raymond JEVP of Worldwide Sales · 6 transactions | — | 149.7Kas of Oct 2017 | 107.9K | — | 33.2K |
| Reiss GunterVP Worldwide Marketing · 28 transactions | — | 135.5Kas of Dec 2020 | 97.9K | — | 76.0K |
| Becker Neil WuVP Worldwide Mktg and Comm · 5 transactions | — | 118.9Kas of Sep 2017 | 136.5K | — | 19.8K |
| White Christopher P.EVP, Worldwide Sales · 4 transactions | — | 101.9Kas of Jan 2020 | 120.4K | — | 18.5K |
| Kapoor SanjayVP of Global Marketing · 1 transaction | — | 95.0Kas of Apr 2015 | 95.0K | — | — |
| Henricks Alan S.Director · 8 transactions | — | 88.6Kas of Dec 2019 | 121.2K | — | 32.6K |
| Bruening Matthew PEVP, Worldwide Sales & Mktg · 42 transactions | — | 85.3Kas of Nov 2023 | 233.9K | — | 148.6K |
| Becker BrianChief Financial Officer · 63 transactions | — | 77.6Kas of Aug 2025 | 174.2K | — | 110.8K |
| Natarajan Shiva KumarInterim CFO · 3 transactions | — | 73.7Kas of May 2017 | 35.0K | — | 5.2K |
| Singer EricDirector · 7 transactions | — | 68.8K | 73.0K | — | 24.7K |
| Straughn GregChief Financial Officer · 3 transactions | — | 65.6Kas of Feb 2017 | 60.0K | — | 6.3K |
| Weber Robert ScottGeneral Counsel · 38 transactions | — | 65.5K | 96.8K | — | 11.1K |
| Wolf Dana ElizabethDirector · 5 transactions | — | 60.1K | 60.1K | — | — |
| Singer Eric +3 co-filersDirector, See Explanation of Responses · 1 transaction | — | 46.6Kas of Nov 2022 | — | — | 60.5K |
| Khoury Sheen GeorgeExecutive VP, Sales and Mktg · 2 transactions | — | 44.3K | 42.8K | — | — |
| Dodson J MichaelDirector · 2 transactions | — | 37.2Kas of May 2020 | 37.2K | — | — |
| Caron Michelle ElizabethChief Financial Officer · 6 transactions | — | 35.6K | 36.4K | — | — |
| Thomas Karen S.EVP, Worldwide Sales and Mkt · 8 transactions | — | 28.6Kas of Dec 2024 | 33.6K | — | 6.2K |
| Dotz MaryDirector · 2 transactions | — | 27.9Kas of Apr 2021 | 27.9K | — | — |
| Singer Eric +1 co-filerDirector, See Explanation of Responses · 1 transaction | — | 0as of Jun 2022 | — | — | 13.0K |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -14.42M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.