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 10.3K
Sold 2.50M
Granted 1.15M · Sold 673.0K
Sold 918.5K
Granted 237.1K · Sold 83.7K
Granted 10.3K · Sold 29.9K
Granted 57.3K · Sold 5.60M
Granted 57.3K
Granted 63.0K · Sold 145.3K
Granted 130.3K · Sold 94.0K
Granted 46.9K · Sold 24.7K
Granted 96.8K · Sold 11.1K
Granted 60.1K
Sold 60.5K
Granted 42.8K
Granted 36.4K
Granted 33.6K · Sold 6.2K
Sold 13.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| 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 |
| 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 · 2 transactions | — | 5.39Mas of Sep 2022 | 10.3K | — | — |
| Singer Eric +4 co-filersDirector, See Explanation of Responses · 11 transactions | -72.1% | 2.17Mas of Nov 2021 | — | — | 2.50M |
| Singer Eric +3 co-filersDirector, See Explanation of Responses · 2 transactions | — | 1.08Mas of Dec 2021 | — | — | — |
| Trivedi DhrupadChief Executive Officer, Director · 69 transactions | +44.5% | 887.8K | 1.15M | — | 673.0K |
| Singer Eric +2 co-filersDirector, See Explanation of Responses · 14 transactions | — | 540.4Kas of May 2022 | — | — | 918.5K |
| Cochran Robert DEVP Legal & Corp Collaboration · 25 transactions | +11.6% | 344.2Kas of Jun 2022 | 237.1K | — | 83.7K |
| Singer Eric +1 co-filerDirector, See Explanation of Responses · 5 transactions | — | 244.3Kas of Aug 2022 | 10.3K | — | 29.9K |
| Chung Peter YDirector · 12 transactions | -97.8% | 207.3K | 57.3K | — | 5.60M |
| Braham TorDirector · 5 transactions | +42.2% | 192.8K | 57.3K | — | — |
| Bruening Matthew PEVP, Worldwide Sales & Mktg · 33 transactions | -49.1% | 85.3Kas of Nov 2023 | 63.0K | — | 145.3K |
| Becker BrianChief Financial Officer · 49 transactions | +23.8% | 77.6Kas of Aug 2025 | 130.3K | — | 94.0K |
| Singer EricDirector · 5 transactions | +22.5% | 68.8K | 46.9K | — | 24.7K |
| 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 | — | — |
| 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 |
| 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 the last 5 years: -10.86M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.