AMBA · Insider Trading
Ambarella, Inc. Ordinary Shares
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-28 | Christopher B Paisley | Director | Sell | −250 | −$17.69K |
| 2026-09-21 | John Alexander Young | CFO | Sell | −1,896 | −$127.56K |
| 2026-09-18 | John Alexander Young | CFO | Sell | −3,126 | −$202.66K |
| 2026-09-18 | Feng-Ming Wang | CEO | Sell | −6,086 | −$394.56K |
| 2026-09-18 | Chan W Lee | Chief Operations Officer | Sell | −2,893 | −$187.55K |
| 2026-09-18 | Chi-Hong Ju | Senior VP, Systems & GM | Sell | −2,009 | −$130.24K |
| 2026-09-10 | Chenming Hu | Director | A | +3,151 | — |
| 2026-09-10 | Elizabeth M Schwarting | Director | A | +3,151 | — |
| 2026-09-10 | Gregory M Bryant | Director | A | +3,151 | — |
| 2026-09-10 | David Jeffrey Richardson | Director | A | +3,151 | — |
| 2026-09-10 | Hsiao-Wuen Hon | Director | A | +3,151 | — |
| 2026-09-10 | Christopher B Paisley | Director | A | +3,151 | — |
| 2026-09-10 | Chantelle Yvette Breithaupt | Director | A | +3,151 | — |
| 2026-07-10 | Yun-Lung Chen | VP, Business Dev. & Marketing | Sell | −5,958 | −$468.66K |
| 2026-07-02 | Feng-Ming Wang | CEO | Sell | −16,250 | −$1.46M |
| 2026-07-02 | Chi-Hong Ju | Senior VP, Systems & GM | Sell | −10,000 | −$888.40K |
| 2026-06-18 | Chan W Lee | Chief Operations Officer | Sell | −2,951 | −$200.28K |
| 2026-06-18 | John Alexander Young | CFO | Sell | −5,033 | −$339.95K |
| 2026-06-18 | Chi-Hong Ju | Senior VP, Systems & GM | Sell | −2,017 | −$136.89K |
| 2026-06-18 | Feng-Ming Wang | CEO | MIXED | −16,204 | −$421.07K |
| 2026-06-16 | Yun-Lung Chen | VP, Business Development and | Sell | −9,856 | −$660.94K |
| 2026-05-28 | Feng-Ming Wang | CEO | Sell | −32,500 | −$2.96M |
| 2026-05-28 | John Alexander Young | CFO | MIXED | — | −$16.08K |
| 2026-04-22 | John Alexander Young | CFO | Sell | −1,971 | −$118.26K |
| 2026-03-19 | Yun-Lung Chen | VP, Business Development and M | MIXED | +7,500 | — |
| 2026-03-19 | Feng-Ming Wang | CEO | MIXED | +16,225 | −$1.44M |
| 2026-03-19 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | MIXED | +8,599 | −$366.22K |
| 2026-03-19 | John Alexander Young | CFO | MIXED | +1,501 | −$406.01K |
| 2026-03-19 | Chan W Lee | Chief Operations Officer | MIXED | +10,628 | −$552.21K |
| 2026-03-04 | Chan W Lee | Chief Operations Officer | A | +24,701 | — |
| 2026-03-04 | John Alexander Young | CFO | A | +15,201 | — |
| 2026-03-04 | Feng-Ming Wang | CEO | MIXED | +53,203 | −$972.03K |
| 2026-03-04 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | A | +17,329 | — |
| 2026-03-04 | Gregory M Bryant | Director | A | +2,457 | — |
| 2026-03-04 | Yun-Lung Chen | VP, Business Development and M | A | +7,220 | — |
| 2026-01-23 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | −7,945 | −$558.14K |
| 2026-01-07 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | −7,728 | −$584.11K |
| 2025-12-31 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | −3,765 | −$264.75K |
| 2025-12-29 | Christopher B Paisley | Director | Sell | −500 | −$36.09K |
| 2025-12-19 | John Alexander Young | CFO | Sell | −6,370 | −$461.82K |
| 2025-12-19 | Chan W Lee | Chief Operations Officer | Sell | −2,406 | −$172.80K |
| 2025-12-19 | Feng-Ming Wang | CEO | MIXED | −19,950 | −$355.51K |
| 2025-12-19 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | −1,342 | −$96.38K |
| 2025-12-18 | Elizabeth M Schwarting | Director | Sell | −624 | −$45.16K |
| 2025-12-17 | David Jeffrey Richardson | Director | G | — | — |
| 2025-10-15 | Chi-Hong Ju | Senior VP, Systems & GM, Asia | Sell | −11,213 | −$909.48K |
| 2025-10-08 | Elizabeth M Schwarting | Director | Sell | −2,664 | −$227.44K |
| 2025-09-19 | Leslie Kohn | Chief Technology Officer | Sell | −2,249 | −$178.64K |
| 2025-09-19 | Chi-Hong Ju | Sr. Vice President, Systems | Sell | −1,168 | −$92.77K |
| 2025-09-19 | Feng-Ming Wang | CEO | Sell | −4,928 | −$391.43K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Leslie Kohn | Chief Technology Officer | 977,428 | $61.70M |
| Feng-Ming Wang | CEO | 767,759 | $48.46M |
| Chi-Hong Ju | Senior VP, Systems & GM | 162,153 | $10.24M |
| Chan W Lee | Chief Operations Officer | 154,443 | $9.75M |
| John Alexander Young | CFO | 107,806 | $6.80M |
| Yun-Lung Chen | VP, Business Dev. & Marketing | 60,557 | $3.82M |
| Christopher B Paisley | Director | 43,930 | $2.77M |
| Hsiao-Wuen Hon | Director | 33,927 | $2.14M |
| Chenming Hu | Director | 32,667 | $2.06M |
| David Jeffrey Richardson | Director | 31,461 | $1.99M |
| Christopher Day | VP, Marketing | 15,099 | $953.05K |
| Elizabeth M Schwarting | Director | 9,841 | $621.16K |
| Chantelle Yvette Breithaupt | Director | 8,091 | $510.70K |
| Gregory M Bryant | Director | 5,608 | $353.98K |
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.
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.