Ambarella Inc (AMBA) · Insider trading
What Ambarella's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$0
0 insiders, 0 trades
Sold, 12 months
$16.88M
7 insiders, 48% under a plan
Net, 12 months
−$16.88M
bought less sold
Latest filing
2026-09-28
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Wang Feng-MingDirector, CEO | – | $11.43M | 19 | 2026-09-17 | 767,759 |
| Ju Chi-HongSenior VP, Systems & GM | – | $4.45M | 17 | 2026-09-17 | 154,153 |
| Young John AlexanderCFO | – | $2.45M | 15 | 2026-09-18 | 107,806 |
| Lee Chan WChief Operations Officer | – | $2.42M | 20 | 2026-09-17 | 154,443 |
| Chen Yun-LungVP, Business Dev. & Marketing | – | $1.85M | 3 | 2026-07-09 | 60,557 |
| Kohn LeslieDirector, Chief Technology Officer | – | $615,546 | 5 | 2025-09-17 | 977,428 |
| Day ChristopherVP, Marketing | – | $385,493 | 8 | 2025-06-17 | 15,099 |
| Schwarting Elizabeth MDirector | – | $290,720 | 3 | 2025-12-16 | 6,690 |
| Paisley Christopher BDirector | – | $270,312 | 6 | 2026-09-25 | 43,930 |
| Hon Hsiao-WuenDirector | – | $27,955 | 1 | 2024-12-13 | 28,278 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-25 | Paisley Christopher BDirector | Saleplan | 250 | 70.76 | $17,690 | 43,930 | Form 4 |
| 2026-09-18 | Young John AlexanderCFO | Saleplan | 1,896 | 67.28 | $127,563 | 107,806 | Form 4 |
| 2026-09-17 | Young John AlexanderCFO | Sale | 3,126 | 64.83 | $202,659 | 109,702 | Form 4 |
| 2026-09-17 | Lee Chan WChief Operations Officer | Sale | 2,893 | 64.83 | $187,553 | 154,443 | Form 4 |
| 2026-09-17 | Ju Chi-HongSenior VP, Systems & GM | Sale | 2,009 | 64.83 | $130,243 | 154,153 | Form 4 |
| 2026-09-17 | Wang Feng-MingDirector, CEO | Sale | 6,086 | 64.83 | $394,555 | 767,759 | Form 4 |
| 2026-07-09 | Chen Yun-LungVP, Business Dev. & Marketing | Sale | 5,958 | 78.66 | $468,656 | 60,557 | Form 4 |
| 2026-07-01 | Wang Feng-MingDirector, CEO | Saleplan | 16,250 | 90.08 | $1.46M | 773,607 | Form 4 |
| 2026-07-01 | Ju Chi-HongSenior VP, Systems & GM | Sale | 10,000 | 88.84 | $888,400 | 155,924 | Form 4 |
| 2026-06-26 | Paisley Christopher BDirector | Saleplan | 250 | 62.01 | $15,502 | 41,029 | Form 4 |
| 2026-06-17 | Wang Feng-MingDirector, CEO | Sale | 6,204 | 67.87 | $421,065 | 799,857 | Form 4 |
| 2026-06-17 | Ju Chi-HongSenior VP, Systems & GM | Sale | 2,017 | 67.87 | $136,894 | 165,924 | Form 4 |
| 2026-06-17 | Lee Chan WChief Operations Officer | Sale | 2,951 | 67.87 | $200,284 | 157,098 | Form 4 |
| 2026-06-17 | Young John AlexanderCFO | Saleplan | 3,186 | 67.87 | $216,234 | 114,437 | Form 4 |
| 2026-06-17 | Young John AlexanderCFO | Saleplan | 1,847 | 66.98 | $123,712 | 112,590 | Form 4 |
| 2026-06-12 | Chen Yun-LungVP, Business Development and | Sale | 9,856 | 67.06 | $660,943 | 66,515 | Form 4 |
| 2026-05-26 | Wang Feng-MingDirector, CEO | Saleplan | 17,285 | 90.38 | $1.56M | 821,276 | Form 4 |
| 2026-05-26 | Wang Feng-MingDirector, CEO | Saleplan | 6,065 | 91.23 | $553,310 | 815,211 | Form 4 |
| 2026-05-26 | Wang Feng-MingDirector, CEO | Saleplan | 9,150 | 92.05 | $842,258 | 806,061 | Form 4 |
| 2026-05-26 | Young John AlexanderCFO | Saleplan | 400 | 96.00 | $38,400 | 117,623 | Form 4 |
| 2026-04-21 | Young John AlexanderCFO | Saleplan | 1,971 | 60.00 | $118,260 | 117,623 | Form 4 |
| 2026-03-19 | Wang Feng-MingDirector, CEO | Sale | 8,083 | 54.14 | $437,614 | 838,561 | Form 4 |
| 2026-03-19 | Ju Chi-HongSenior VP, Systems & GM, Asia | Sale | 2,155 | 54.14 | $116,672 | 167,941 | Form 4 |
| 2026-03-19 | Lee Chan WChief Operations Officer | Sale | 3,641 | 54.14 | $197,124 | 160,049 | Form 4 |
| 2026-03-19 | Young John AlexanderCFO | Sale | 3,038 | 54.14 | $164,477 | 119,594 | Form 4 |
| 2026-03-17 | Wang Feng-MingDirector, CEO | Sale | 18,976 | 52.77 | $1.00M | 830,958 | Form 4 |
| 2026-03-17 | Ju Chi-HongSenior VP, Systems & GM, Asia | Sale | 4,729 | 52.77 | $249,549 | 164,166 | Form 4 |
| 2026-03-17 | Lee Chan WChief Operations Officer | Sale | 6,729 | 52.77 | $355,089 | 156,370 | Form 4 |
| 2026-03-17 | Young John AlexanderCFO | Sale | 4,577 | 52.77 | $241,528 | 117,072 | Form 4 |
| 2026-03-02 | Wang Feng-MingDirector, CEO | Saleplan | 1,000 | 56.83 | $56,830 | 817,979 | Form 4 |
| 2026-03-02 | Wang Feng-MingDirector, CEO | Saleplan | 1,900 | 58.77 | $111,663 | 816,079 | Form 4 |
| 2026-03-02 | Wang Feng-MingDirector, CEO | Saleplan | 2,600 | 59.53 | $154,778 | 813,479 | Form 4 |
| 2026-03-02 | Wang Feng-MingDirector, CEO | Saleplan | 32,460 | 60.91 | $1.98M | 781,019 | Form 4 |
| 2026-03-02 | Wang Feng-MingDirector, CEO | Saleplan | 12,040 | 61.42 | $739,497 | 768,979 | Form 4 |
| 2026-01-05 | Ju Chi-HongSenior VP, Systems & GM, Asia | Sale | 7,728 | 75.58 | $584,082 | 146,039 | Form 4 |
| 2025-12-30 | Ju Chi-HongSenior VP, Systems & GM, Asia | Sale | 7,945 | 70.25 | $558,136 | 149,587 | Form 4/A |
| 2025-12-26 | Paisley Christopher BDirector | Sale | 500 | 72.18 | $36,090 | 41,279 | Form 4 |
| 2025-12-18 | Young John AlexanderCFO | Sale | 3,791 | 72.96 | $276,591 | 102,738 | Form 4 |
| 2025-12-17 | Wang Feng-MingDirector, CEO | Sale | 4,950 | 71.82 | $355,509 | 783,979 | Form 4 |
| 2025-12-17 | Ju Chi-HongSenior VP, Systems & GM, Asia | Sale | 1,342 | 71.82 | $96,382 | 157,532 | Form 4 |
57 more
| 2025-12-17 | Lee Chan WChief Operations Officer | Sale | 2,406 | 71.82 | $172,799 | 124,566 | Form 4 |
| 2025-12-17 | Young John AlexanderCFO | Sale | 2,579 | 71.82 | $185,224 | 106,529 | Form 4 |
| 2025-12-16 | Schwarting Elizabeth MDirector | Sale | 624 | 72.38 | $45,165 | 6,690 | Form 4 |
| 2025-10-14 | Ju Chi-HongSenior VP, Systems & GM, Asia | Sale | 6,156 | 80.96 | $498,390 | 158,874 | Form 4 |
| 2025-10-13 | Ju Chi-HongSenior VP, Systems & GM, Asia | Sale | 5,057 | 81.29 | $411,084 | 165,030 | Form 4 |
| 2025-10-06 | Schwarting Elizabeth MDirector | Sale | 2,664 | 85.38 | $227,452 | 7,314 | Form 4 |
| 2025-09-17 | Wang Feng-MingDirector, CEO | Sale | 4,928 | 79.43 | $391,431 | 788,929 | Form 4 |
| 2025-09-17 | Ju Chi-HongSr. Vice President, Systems | Sale | 1,168 | 79.43 | $92,774 | 170,087 | Form 4 |
| 2025-09-17 | Kohn LeslieDirector, Chief Technology Officer | Sale | 2,249 | 79.43 | $178,638 | 977,428 | Form 4 |
| 2025-09-17 | Lee Chan WChief Operating Officer | Sale | 1,947 | 79.43 | $154,650 | 126,972 | Form 4 |
| 2025-09-17 | Young John AlexanderCFO | Sale | 2,566 | 79.43 | $203,817 | 109,108 | Form 4 |
| 2025-09-10 | Chen Yun-LungVP, Business Development | Sale | 8,492 | 84.42 | $716,895 | 61,651 | Form 4 |
| 2025-06-25 | Paisley Christopher BDirector | Saleplan | 1,000 | 62.58 | $62,580 | 39,281 | Form 4 |
| 2025-06-17 | Wang Feng-MingDirector, CEO | Sale | 4,677 | 52.26 | $244,420 | 793,634 | Form 4 |
| 2025-06-17 | Ju Chi-HongSr. Vice President, Systems | Sale | 1,108 | 52.26 | $57,904 | 171,032 | Form 4 |
| 2025-06-17 | Kohn LeslieDirector, Chief Technology Officer | Sale | 1,715 | 52.26 | $89,626 | 979,677 | Form 4 |
| 2025-06-17 | Lee Chan WChief Operating Officer | Sale | 1,601 | 52.26 | $83,668 | 128,696 | Form 4 |
| 2025-06-17 | Day ChristopherVP, Marketing | Sale | 342 | 52.26 | $17,873 | 15,099 | Form 4 |
| 2025-06-17 | Young John AlexanderCFO | Sale | 2,435 | 52.26 | $127,253 | 111,451 | Form 4 |
| 2025-03-25 | Paisley Christopher BDirector | Sale | 500 | 55.50 | $27,750 | 40,281 | Form 4 |
| 2025-03-18 | Wang Feng-MingDirector, CEO | Sale | 3,194 | 55.02 | $175,734 | 798,311 | Form 4 |
| 2025-03-18 | Ju Chi-HongSr. Vice President, Systems | Sale | 1,034 | 55.02 | $56,891 | 172,140 | Form 4 |
| 2025-03-18 | Kohn LeslieDirector, Chief Technology Officer | Sale | 1,584 | 55.02 | $87,152 | 981,392 | Form 4 |
| 2025-03-18 | Lee Chan WChief Operating Officer | Sale | 1,468 | 55.02 | $80,769 | 130,297 | Form 4 |
| 2025-03-18 | Day ChristopherVP, Marketing | Sale | 479 | 55.02 | $26,355 | 15,441 | Form 4 |
| 2025-03-18 | Young John AlexanderCFO | Sale | 2,103 | 55.02 | $115,707 | 113,886 | Form 4 |
| 2025-03-06 | Wang Feng-MingDirector, CEO | Sale | 4,104 | 55.11 | $226,171 | 801,271 | Form 4 |
| 2025-03-06 | Ju Chi-HongSr. Vice President, Systems | Sale | 1,859 | 55.11 | $102,449 | 172,940 | Form 4 |
| 2025-03-06 | Kohn LeslieDirector, Chief Technology Officer | Sale | 2,316 | 55.11 | $127,635 | 982,976 | Form 4 |
| 2025-03-06 | Lee Chan WChief Operating Officer | Sale | 2,108 | 55.11 | $116,172 | 131,531 | Form 4 |
| 2025-03-06 | Day ChristopherVP, Marketing | Sale | 834 | 55.11 | $45,962 | 15,686 | Form 4 |
| 2025-03-06 | Young John AlexanderCFO | Sale | 2,663 | 55.11 | $146,758 | 115,755 | Form 4 |
| 2025-01-16 | Lee Chan WChief Operating Officer | Sale | 1,000 | 77.21 | $77,210 | 109,918 | Form 4 |
| 2025-01-15 | Lee Chan WChief Operating Officer | Sale | 1,000 | 75.90 | $75,900 | 110,918 | Form 4 |
| 2025-01-14 | Lee Chan WChief Operating Officer | Sale | 1,000 | 75.68 | $75,680 | 111,918 | Form 4 |
| 2025-01-13 | Lee Chan WChief Operating Officer | Sale | 1,000 | 73.50 | $73,500 | 112,918 | Form 4 |
| 2025-01-10 | Lee Chan WChief Operating Officer | Sale | 1,000 | 74.12 | $74,120 | 113,918 | Form 4 |
| 2025-01-08 | Lee Chan WChief Operating Officer | Sale | 1,000 | 73.48 | $73,480 | 114,918 | Form 4 |
| 2025-01-07 | Lee Chan WChief Operating Officer | Sale | 1,000 | 78.73 | $78,730 | 115,918 | Form 4 |
| 2025-01-06 | Lee Chan WChief Operating Officer | Sale | 1,000 | 79.15 | $79,150 | 116,918 | Form 4 |
| 2025-01-03 | Day ChristopherVP, Marketing | Sale | 1,247 | 78.10 | $97,391 | 14,530 | Form 4 |
| 2025-01-03 | Lee Chan WChief Operating Officer | Sale | 1,000 | 75.06 | $75,060 | 117,918 | Form 4 |
| 2025-01-02 | Lee Chan WChief Operating Officer | Sale | 1,000 | 73.32 | $73,320 | 118,918 | Form 4 |
| 2024-12-26 | Paisley Christopher BDirector | Sale | 1,500 | 73.80 | $110,700 | 40,781 | Form 4 |
| 2024-12-18 | Day ChristopherVP, Marketing | Sale | 81 | 75.41 | $6,108 | 16,625 | Form 4 |
| 2024-12-18 | Day ChristopherVP, Marketing | Sale | 848 | 75.40 | $63,939 | 15,777 | Form 4 |
| 2024-12-18 | Schwarting Elizabeth MDirector | Sale | 253 | 71.55 | $18,102 | 7,902 | Form 4 |
| 2024-12-16 | Wang Feng-MingDirector, CEO | Sale | 4,296 | 75.41 | $323,961 | 755,231 | Form 4 |
| 2024-12-16 | Ju Chi-HongSr. Vice President, Systems | Sale | 1,048 | 75.41 | $79,030 | 157,638 | Form 4 |
| 2024-12-16 | Kohn LeslieDirector, Chief Technology Officer | Sale | 1,757 | 75.41 | $132,495 | 959,676 | Form 4 |
| 2024-12-16 | Lee Chan WChief Operating Officer | Sale | 1,488 | 75.41 | $112,210 | 119,918 | Form 4 |
| 2024-12-16 | Day ChristopherVP, Marketing | Sale | 482 | 75.41 | $36,348 | 16,706 | Form 4 |
| 2024-12-16 | Young John AlexanderCFO | Sale | 2,136 | 75.41 | $161,076 | 101,393 | Form 4 |
| 2024-12-13 | Hon Hsiao-WuenDirector | Sale | 377 | 74.15 | $27,955 | 28,278 | Form 4 |
| 2024-12-09 | Ju Chi-HongSr. Vice President, Systems | Sale | 2,118 | 75.69 | $160,311 | 161,686 | Form 4 |
| 2024-12-09 | Ju Chi-HongSr. Vice President, Systems | Sale | 3,000 | 75.72 | $227,160 | 158,686 | Form 4 |
| 2024-12-02 | Day ChristopherVP, Marketing | Sale | 1,278 | 71.61 | $91,518 | 17,188 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
37 × grant or award9 × gift7 × option exercise1 × returned to the company
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-09-08 | Paisley Christopher BDirector | Grant or award A | +3,151 | – | 44,180 | Form 4 |
| 2026-09-08 | Richardson David JeffreyDirector | Grant or award A | +3,151 | – | 5,649 | Form 4 |
| 2026-09-08 | Hon Hsiao-WuenDirector | Grant or award A | +3,151 | – | 33,927 | Form 4 |
| 2026-09-08 | Schwarting Elizabeth MDirector | Grant or award A | +3,151 | – | 9,841 | Form 4 |
| 2026-09-08 | Breithaupt Chantelle YvetteDirector | Grant or award A | +3,151 | – | 8,091 | Form 4 |
| 2026-09-08 | Bryant Gregory MDirector | Grant or award A | +3,151 | – | 5,608 | Form 4 |
| 2026-09-08 | Hu ChenmingDirector | Grant or award A | +3,151 | – | 32,667 | Form 4 |
| 2026-06-17 | Wang Feng-MingDirector, CEO | Gift G | −10,000 | – | 789,857 | Form 4 |
| 2026-05-26 | Young John AlexanderCFO | Option exercise M | +400 | 55.80 | 118,023 | Form 4 |
| 2026-03-18 | Wang Feng-MingDirector, CEO | Grant or award A | +15,686 | – | 846,644 | Form 4 |
| 2026-03-18 | Ju Chi-HongSenior VP, Systems & GM, Asia | Grant or award A | +5,930 | – | 170,096 | Form 4 |
| 2026-03-18 | Lee Chan WChief Operations Officer | Grant or award A | +7,320 | – | 163,690 | Form 4 |
| 2026-03-18 | Chen Yun-LungVP, Business Development and M | Grant or award A | +2,849 | – | 76,371 | Form 4 |
| 2026-03-18 | Young John AlexanderCFO | Grant or award A | +5,560 | – | 122,632 | Form 4 |
| 2026-03-17 | Wang Feng-MingDirector, CEO | Option exercise M | +27,598 | – | 849,934 | Form 4 |
| 2026-03-17 | Ju Chi-HongSenior VP, Systems & GM, Asia | Option exercise M | +9,553 | – | 168,895 | Form 4 |
| 2026-03-17 | Lee Chan WChief Operations Officer | Option exercise M | +13,678 | – | 163,099 | Form 4 |
| 2026-03-17 | Chen Yun-LungVP, Business Development and M | Option exercise M | +4,651 | – | 73,522 | Form 4 |
| 2026-03-17 | Young John AlexanderCFO | Option exercise M | +3,556 | – | 121,649 | Form 4 |
| 2026-03-02 | Bryant Gregory MDirector | Grant or award A | +2,457 | – | 2,457 | Form 4 |
| 2026-03-02 | Wang Feng-MingDirector, CEO | Option exercise M | +50,000 | 41.36 | 818,979 | Form 4 |
| 2026-03-02 | Wang Feng-MingDirector, CEO | Grant or award A | +53,203 | – | 822,182 | Form 4 |
| 2026-03-02 | Ju Chi-HongSenior VP, Systems & GM, Asia | Grant or award A | +17,329 | – | 159,188 | Form 4 |
| 2026-03-02 | Lee Chan WChief Operations Officer | Grant or award A | +24,701 | – | 149,267 | Form 4 |
| 2026-03-02 | Chen Yun-LungVP, Business Development and M | Grant or award A | +7,220 | – | 68,871 | Form 4 |
| 2026-03-02 | Young John AlexanderCFO | Grant or award A | +15,201 | – | 117,939 | Form 4 |
| 2025-12-19 | Wang Feng-MingDirector, CEO | Gift G | −15,000 | – | 768,979 | Form 4 |
| 2025-12-15 | Richardson David JeffreyDirector | Gift G | −2,531 | – | 2,498 | Form 4 |
| 2025-12-15 | Richardson David JeffreyDirector | Gift G | +2,531 | – | 25,812 | Form 4 |
| 2025-09-02 | Hu ChenmingDirector | Grant or award A | +2,498 | – | 29,516 | Form 4 |
| 2025-09-02 | Paisley Christopher BDirector | Grant or award A | +2,498 | – | 41,779 | Form 4 |
| 2025-09-02 | Richardson David JeffreyDirector | Grant or award A | +2,498 | – | 5,029 | Form 4 |
| 2025-09-02 | Hon Hsiao-WuenDirector | Grant or award A | +2,498 | – | 30,776 | Form 4 |
| 2025-09-02 | Schwarting Elizabeth MDirector | Grant or award A | +2,498 | – | 9,978 | Form 4 |
| 2025-09-02 | Breithaupt Chantelle YvetteDirector | Grant or award A | +2,498 | – | 4,940 | Form 4 |
| 2025-03-17 | Schwarting Elizabeth MDirector | Returned to the company D | −422 | 55.90 | 7,480 | Form 4 |
| 2025-03-05 | Wang Feng-MingDirector, CEO | Grant or award A | +11,024 | – | 805,375 | Form 4 |
| 2025-03-05 | Ju Chi-HongSr. Vice President, Systems | Grant or award A | +4,773 | – | 174,799 | Form 4 |
| 2025-03-05 | Kohn LeslieDirector, Chief Technology Officer | Grant or award A | +6,056 | – | 985,292 | Form 4 |
| 2025-03-05 | Lee Chan WChief Operating Officer | Grant or award A | +5,465 | – | 133,639 | Form 4 |
| 2025-03-05 | Chen Yun-LungVP, Business Development | Grant or award A | +2,249 | – | 70,143 | Form 4 |
| 2025-03-05 | Day ChristopherVP, Marketing | Grant or award A | +1,990 | – | 16,520 | Form 4 |
| 2025-03-05 | Young John AlexanderCFO | Grant or award A | +4,637 | – | 118,418 | Form 4 |
| 2025-02-28 | Wang Feng-MingDirector, CEO | Grant or award A | +39,120 | – | 794,351 | Form 4 |
| 2025-02-28 | Ju Chi-HongSr. Vice President, Systems | Grant or award A | +12,388 | – | 170,026 | Form 4 |
| 2025-02-28 | Kohn LeslieDirector, Chief Technology Officer | Grant or award A | +19,560 | – | 979,236 | Form 4 |
| 2025-02-28 | Lee Chan WChief Operating Officer | Grant or award A | +18,256 | – | 128,174 | Form 4 |
| 2025-02-28 | Chen Yun-LungVP, Business Development | Grant or award A | +5,868 | – | 67,894 | Form 4 |
| 2025-02-28 | Young John AlexanderCFO | Grant or award A | +12,388 | – | 113,781 | Form 4 |
| 2025-01-15 | Richardson David JeffreyDirector | Gift G | −1,648 | – | 2,531 | Form 4 |
| 2025-01-15 | Richardson David JeffreyDirector | Gift G | +1,648 | – | 23,281 | Form 4 |
| 2024-12-09 | Ju Chi-HongSr. Vice President, Systems | Gift G | −593 | – | 163,804 | Form 4 |
| 2024-12-04 | Ju Chi-HongSr. Vice President, Systems | Gift G | −5,000 | – | 164,397 | Form 4 |
| 2024-12-04 | Ju Chi-HongSr. Vice President, Systems | Gift G | +5,000 | – | 8,000 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.