A10 Networks, Inc.
Ownership
Ownership Structure
Who owns A10 Networks, Inc. (ATEN)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.2% of the shares are freely tradable; institutional investors hold 103.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 18.69 | 13,568,496 | +3.7 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 4.77 | 3,462,058 | +2.2 | 06/30/2026 |
| First Trust Advisors L.P. | 4.47 | 3,244,739 | +88.7 | 06/30/2026 |
| State Street Corp | 4.25 | 3,082,631 | -0.2 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.23 | 3,071,071 | -1.6 | 06/30/2026 |
| Penserra Capital Management, LLC | 4.23 | 3,068,045 | -14.6 | 06/30/2026 |
| BTIM Corp | 3.33 | 2,416,808 | +11.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.95 | 4,321,395 | +0.0 | 09/30/2026 |
| Amplify Cybersecurity ETF | 5.39 | 3,916,223 | +0.5 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.01 | 2,186,135 | +0.3 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Wolf Dana Elizabeth | Director | 57,409 | 1,349,112 $ | Aug 25, 2026 | direct |
| Weber Robert Scott | General Counsel | 50,586 | 1,188,771 $ | Aug 11, 2026 | direct |
| Caron Michelle Elizabeth | Chief Financial Officer | 33,871 | 795,969 $ | Oct 5, 2026 | direct |
| Henry Mary C | Director | 7,981 | 187,554 $ | Oct 5, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 5, 2026 | Caron Michelle Elizabeth | Chief Financial Officer | Other | 1,743 | 28.19 | 49,135 |
| Oct 5, 2026 | Henry Mary C | Director | Other | 7,981 | 0.00 | – |
| Aug 25, 2026 | Wolf Dana Elizabeth | Director | Sell | 2,652 | 25.65 | 68,024 |
| Aug 11, 2026 | Weber Robert Scott | General Counsel | Sell | 14,086 | 27.86 | 392,436 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.