Onto Innovation Inc
Ownership
Ownership Structure
Who owns Onto Innovation Inc (ONTO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.3% of the shares are freely tradable; institutional investors hold 100.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.22 | 5,505,181 | -0.5 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.56 | 2,727,910 | -0.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.58 | 2,247,737 | +1.1 | 06/30/2026 |
| State Street Corp | 3.17 | 1,554,825 | +3.7 | 06/30/2026 |
| Geode Capital Management, LLC | 2.92 | 1,433,715 | +18.4 | 06/30/2026 |
| Amvescap Plc. | 2.75 | 1,351,886 | +113.6 | 06/30/2026 |
| Paradigm Capital Management, Inc. | 2.24 | 1,101,438 | -0.1 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.56 | 1,748,030 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 1,558,692 | -1.4 | 09/30/2026 |
| Vanguard Small Cap Index | 2.25 | 1,104,625 | -3.5 | 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 |
|---|---|---|---|---|---|
| Roberts Brian K | Chief Financial Officer | 21,032 | 4,240,051 $ | Sep 2, 2026 | direct |
| Chen Shirley | Senior Vice President of Custo | 14,001 | 2,822,602 $ | Sep 2, 2026 | direct |
| Miller David Brian | Director | 10,692 | 2,155,507 $ | Sep 29, 2026 | direct |
| Lynch Susan D | Director | 2,684 | 541,094 $ | Aug 21, 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 |
|---|---|---|---|---|---|---|
| Sep 29, 2026 | Miller David Brian | Director | Sell | 2,000 | 300.00 | 600,000 |
| Sep 2, 2026 | Chen Shirley | Senior Vice President of Custo | Other | 1,516 | 254.55 | 385,898 |
| Sep 2, 2026 | Roberts Brian K | Chief Financial Officer | Other | 3,239 | 254.55 | 824,487 |
| Aug 21, 2026 | Lynch Susan D | Director | Sell | 1,000 | 302.30 | 302,300 |
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: October 30, 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.