Ambarella Inc
Ownership
Ownership Structure
Who owns Ambarella Inc (AMBA)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 95.4% of the shares are freely tradable; institutional investors hold 87.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.58 | 3,789,215 | -1.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 8.42 | 3,716,863 | +0.0 | 03/31/2026 |
| State Street Corp | 4.48 | 1,976,464 | +16.1 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.11 | 1,814,603 | +0.0 | 03/31/2026 |
| Manufacturers Life Insurance Co | 3.59 | 1,586,082 | +49.5 | 03/31/2026 |
| Geode Capital Management, LLC | 2.33 | 1,029,229 | +0.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.00 | 1,326,387 | +0.4 | 07/31/2026 |
| State Street® SPDR® S&P® Smcndctr ETF | 2.59 | 1,143,825 | +0.0 | 08/31/2026 |
| iShares Russell 2000 ETF | 2.48 | 1,094,272 | -0.6 | 08/31/2026 |
| Vanguard Information Technology ETF | 2.30 | 1,015,267 | +0.4 | 07/31/2026 |
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 |
|---|---|---|---|---|---|
| Paisley Christopher B | Director | 44,180 | 2,955,642 $ | Sep 8, 2026 | direct |
| Hon Hsiao-Wuen | Director | 33,927 | 2,269,716 $ | Sep 8, 2026 | direct |
| Hu Chenming | Director | 32,667 | 2,185,422 $ | Sep 8, 2026 | direct |
| Schwarting Elizabeth M | Director | 9,841 | 658,363 $ | Sep 8, 2026 | direct |
| Breithaupt Chantelle Yvette | Director | 8,091 | 541,288 $ | Sep 8, 2026 | direct |
| Richardson David Jeffrey | Director | 5,649 | 377,918 $ | Sep 8, 2026 | direct |
| Bryant Gregory M | Director | 5,608 | 375,175 $ | Sep 8, 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 8, 2026 | Hu Chenming | Director | Other | 3,151 | 0.00 | – |
| Sep 8, 2026 | Bryant Gregory M | Director | Other | 3,151 | 0.00 | – |
| Sep 8, 2026 | Breithaupt Chantelle Yvette | Director | Other | 3,151 | 0.00 | – |
| Sep 8, 2026 | Schwarting Elizabeth M | Director | Other | 3,151 | 0.00 | – |
| Sep 8, 2026 | Hon Hsiao-Wuen | Director | Other | 3,151 | 0.00 | – |
| Sep 8, 2026 | Richardson David Jeffrey | Director | Other | 3,151 | 0.00 | – |
| Sep 8, 2026 | Paisley Christopher B | Director | Other | 3,151 | 0.00 | – |
| Apr 21, 2026 | John Alexander Young | CFO | Sell | 1,971 | 60.00 | 118,260 |
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: September 17, 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.