AMBA (Ambarella, Inc. Ordinary Shares)
Insider Trading Activity
Every open-market purchase and sale reported by AMBA officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-10 | Yun-Lung Chen | VP, Business Dev. & Marketing | Sell | — | — |
| 2026-07-02 | Feng-Ming Wang | CEO | Sell | — | — |
| 2026-07-02 | Chi-Hong Ju | Senior VP, Systems & GM | Sell | — | — |
| 2026-06-18 | Chan W Lee | Chief Operations Officer | Sell | — | — |
| 2026-06-18 | John Alexander Young | CFO | Sell | — | — |
| 2026-06-18 | Chi-Hong Ju | Senior VP, Systems & GM | Sell | — | — |
| 2026-06-18 | Feng-Ming Wang | CEO | MIXED | — | — |
| 2026-06-16 | Yun-Lung Chen | VP, Business Development and | Sell | — | — |
| 2026-05-28 | Feng-Ming Wang | CEO | Sell | — | — |
| 2026-05-28 | John Alexander Young | CFO | MIXED | — | — |
| 2026-04-22 | John Alexander Young | CFO | Sell | — | — |
| 2026-03-19 | Yun-Lung Chen | VP, Business Development and M | MIXED | — | — |
| 2026-03-19 | Feng-Ming Wang | CEO | MIXED | — | — |
| 2026-03-19 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | MIXED | — | — |
| 2026-03-19 | John Alexander Young | CFO | MIXED | — | — |
| 2026-03-19 | Chan W Lee | Chief Operations Officer | MIXED | — | — |
| 2026-03-04 | Chan W Lee | Chief Operations Officer | A | — | — |
| 2026-03-04 | John Alexander Young | CFO | A | — | — |
| 2026-03-04 | Feng-Ming Wang | CEO | MIXED | — | — |
| 2026-03-04 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | A | — | — |
| 2026-03-04 | Gregory M Bryant | Director | A | — | — |
| 2026-03-04 | Yun-Lung Chen | VP, Business Development and M | A | — | — |
| 2026-01-23 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | — | — |
| 2026-01-07 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | — | — |
| 2025-12-31 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | — | — |
| 2025-12-29 | CHRISTOPHER B PAISLEY | Director | Sell | — | — |
| 2025-12-19 | John Alexander Young | CFO | Sell | — | — |
| 2025-12-19 | Chan W Lee | Chief Operations Officer | Sell | — | — |
| 2025-12-19 | Feng-Ming Wang | CEO | MIXED | — | — |
| 2025-12-19 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | — | — |
| 2025-12-18 | Elizabeth M Schwarting | Director | Sell | — | — |
| 2025-12-17 | DAVID JEFFREY RICHARDSON | Director | G | — | — |
| 2025-10-15 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | — | — |
| 2025-10-08 | Elizabeth M Schwarting | Director | Sell | — | — |
| 2025-09-19 | Leslie Kohn | Chief Technology Officer | Sell | — | — |
| 2025-09-19 | Chi-Hong Ju | Sr. Vice President, Systems | Sell | — | — |
| 2025-09-19 | Feng-Ming Wang | CEO | Sell | — | — |
| 2025-09-19 | Chan W Lee | Chief Operating Officer | Sell | — | — |
| 2025-09-19 | John Alexander Young | CFO | Sell | — | — |
| 2025-09-12 | Yun-Lung Chen | VP, Business Development | Sell | — | — |
| 2025-09-04 | Chenming Hu | Director | A | — | — |
| 2025-09-04 | Chantelle Yvette Breithaupt | Director | A | — | — |
| 2025-09-04 | Hsiao-Wuen Hon | Director | A | — | — |
| 2025-09-04 | Elizabeth M Schwarting | Director | A | — | — |
| 2025-09-04 | DAVID JEFFREY RICHARDSON | Director | A | — | — |
| 2025-09-04 | CHRISTOPHER B PAISLEY | Director | A | — | — |
| 2025-06-27 | CHRISTOPHER B PAISLEY | Director | Sell | — | — |
| 2025-06-20 | Leslie Kohn | Chief Technology Officer | Sell | — | — |
| 2025-06-20 | Christopher Day | VP, Marketing | Sell | — | — |
| 2025-06-20 | Chan W Lee | Chief Operating Officer | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 3,150,520 | — |
| — | 10%+ Owner | 2,820,041 | — |
| — | — | 2,115,812 | — |
| — | 10%+ Owner | 1,938,363 | — |
| — | Chief Technology Officer | 977,428 | — |
| — | CEO | 773,607 | — |
| — | Senior VP, Systems & GM | 163,924 | — |
| — | Chief Operations Officer | 157,098 | — |
| — | CFO | 112,590 | — |
| — | Executive Vice President | 100,002 | — |
| — | Director | 84,584 | — |
| — | CFO | 74,140 | — |
| — | CFO | 73,259 | — |
| — | VP, Business Dev. & Marketing | 60,557 | — |
| — | Executive Vice President | 57,880 | — |
| — | 10%+ Owner | 41,599 | — |
| — | Director | 41,279 | — |
| — | Director | 30,776 | — |
| — | Director | 29,516 | — |
| — | Director | 28,310 | — |
| — | VP, Marketing | 15,099 | — |
| — | Director | 10,772 | — |
| — | Director | 8,611 | — |
| — | 10%+ Owner | 7,967 | — |
| — | Director | 6,690 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the AMBA quote page; the site-wide leaderboard is on the insider transactions hub.