Updated Jul 16, 2026 · Last SEC filing 2026-07-10
AMBARELLA INC (AMBA) has filed 12 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-10. 2 Form 8-K material event filings were reported by AMBA in the last 90 days. 9 Form 144 notices of proposed sale were filed for AMBA stock. InsiderAlpha tracks every AMBA SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Semiconductors & Related Devices (SIC 3674) |
|---|---|
| SEC CIK | 0001280263 |
| Form 4 filings (90d) | 12 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 9 |
| Latest Form 4 filing | 2026-07-10 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Chen Yun-Lung | VP, Business Dev. & Marketing | S — Open-market sale | 6.0K | $78.66 | $469K | SEC | |
| Wang Feng-Ming | CEO | S — Open-market sale | 16.2K | $90.08 | $1.46M | SEC | |
| Ju Chi-Hong | Senior VP, Systems & GM | S — Open-market sale | 10.0K | $88.84 | $888K | SEC | |
| PAISLEY CHRISTOPHER B | Director | S — Open-market sale | 250 | $62.01 | $16K | SEC | |
| Wang Feng-Ming | CEO | G — Bona-fide gift | 10.0K | $0.00 | — | SEC | |
| Young John Alexander | CFO | S — Open-market sale | 1.8K | $66.98 | $124K | SEC | |
| Lee Chan W | Chief Operations Officer | S — Open-market sale | 3.0K | $67.87 | $200K | SEC | |
| Wang Feng-Ming | CEO | S — Open-market sale | 6.2K | $67.87 | $421K | SEC | |
| Young John Alexander | CFO | S — Open-market sale | 3.2K | $67.87 | $216K | SEC | |
| Ju Chi-Hong | Senior VP, Systems & GM | S — Open-market sale | 2.0K | $67.87 | $137K | SEC | |
| Chen Yun-Lung | VP, Business Development and | S — Open-market sale | 9.9K | $67.06 | $661K | SEC | |
| Wang Feng-Ming | CEO | S — Open-market sale | 17.3K | $90.38 | $1.56M | SEC | |
| Wang Feng-Ming | CEO | S — Open-market sale | 6.1K | $91.23 | $553K | SEC | |
| Young John Alexander | CFO | S — Open-market sale | 400 | $96.00 | $38K | SEC | |
| Young John Alexander | CFO | M — Option exercise | 400 | $55.80 | $22K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for AMBARELLA INC (AMBA). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Wang Feng-Ming | 6 | $4.84M |
| Young John Alexander | 6 | $519K |
| Ju Chi-Hong | 2 | $1.03M |
| Chen Yun-Lung | 2 | $1.13M |
| PAISLEY CHRISTOPHER B | 1 | $16K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in AMBA insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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