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Ambarella Inc (NASDAQ:AMBA)
US · Delayed Price · Currency is USD
Also listed: 0YU1.LTechnology · Semiconductors
65.43-1.07 (-1.61%)
Insider Score
––Not scored
AMBA Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
AMBA Stock Insider Trading Activity
AMBA stock’s insider trading shows 19 sales on the open market for an estimated $7.09M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| PAISLEY CHRISTOPHER B Director | Sell | 250 | $70.76 | $17.69K | 0.6% | 43,930 | Sep 25, 2026 | — | Form 4 |
| Young John Alexander CFO | Sell | 1,896 | $67.28 | $127.56K | 1.7% | 107,806 | Sep 18, 2026 | — | Form 4 |
| Wang Feng-Ming CEO | Sell | 6,086 | $64.83 | $394.56K | 0.8% | 767,759 | Sep 17, 2026 | — | Form 4 |
| Ju Chi-Hong Other | Sell | 2,009 | $64.83 | $130.24K | 1.3% | 154,153 | Sep 17, 2026 | — | Form 4 |
| Lee Chan W Other | Sell | 2,893 | $64.83 | $187.55K | 1.8% | 154,443 | Sep 17, 2026 | — | Form 4 |
| Young John Alexander CFO | Sell | 3,126 | $64.83 | $202.66K | 2.8% | 109,702 | Sep 17, 2026 | — | Form 4 |
| Hu Chenming Director | Award | 3,151 | — | — | 10.7% | 32,667 | Sep 8, 2026 | — | Form 4 |
| Breithaupt Chantelle Yvette Director | Award | 3,151 | — | — | 63.8% | 8,091 | Sep 8, 2026 | — | Form 4 |
| PAISLEY CHRISTOPHER B Director | Award | 3,151 | — | — | 7.7% | 44,180 | Sep 8, 2026 | — | Form 4 |
| RICHARDSON DAVID JEFFREY Director | Award | 3,151 | — | — | 126% | 5,649 | Sep 8, 2026 | — | Form 4 |
| Hon Hsiao-Wuen Director | Award | 3,151 | — | — | 10.2% | 33,927 | Sep 8, 2026 | — | Form 4 |
| Schwarting Elizabeth M Director | Award | 3,151 | — | — | 47.1% | 9,841 | Sep 8, 2026 | — | Form 4 |
| Bryant Gregory M Director | Award | 3,151 | — | — | 128% | 5,608 | Sep 8, 2026 | — | Form 4 |
| Chen Yun-Lung Other | Sell | 5,958 | $78.66 | $468.66K | 9.0% | 60,557 | Jul 9, 2026 | — | Form 4 |
| Ju Chi-Hong Other | Sell | 10,000 | $88.84 | $888.40K | 6.0% | 155,924 | Jul 1, 2026 | — | Form 4 |
| Wang Feng-Ming CEO | Sell | 16,250 | $90.08 | $1.46M | 2.1% | 773,607 | Jul 1, 2026 | — | Form 4 |
| PAISLEY CHRISTOPHER B Director | Sell | 250 | $62.01 | $15.50K | 0.6% | 41,029 | Jun 26, 2026 | — | Form 4 |
| Wang Feng-Ming CEO | Sell | 6,204 | $67.87 | $421.07K | 0.8% | 799,857 | Jun 17, 2026 | — | Form 4 |
| Wang Feng-Ming CEO | Gift | 10,000 | — | — | 1.3% | 789,857 | Jun 17, 2026 | — | Form 4 |
| Young John Alexander CFO | Sell | 3,186 | $67.87 | $216.23K | 2.7% | 114,437 | Jun 17, 2026 | — | Form 4 |
| Young John Alexander CFO | Sell | 1,847 | $66.98 | $123.71K | 1.6% | 112,590 | Jun 17, 2026 | — | Form 4 |
| Lee Chan W Other | Sell | 2,951 | $67.87 | $200.28K | 1.8% | 157,098 | Jun 17, 2026 | — | Form 4 |
| Ju Chi-Hong Other | Sell | 2,017 | $67.87 | $136.89K | 1.2% | 165,924 | Jun 17, 2026 | — | Form 4 |
| Chen Yun-Lung Other | Sell | 9,856 | $67.06 | $660.94K | 12.9% | 66,515 | Jun 12, 2026 | — | Form 4 |
| Wang Feng-Ming CEO | Sell | 6,065 | $91.23 | $553.31K | 0.7% | 815,211 | May 26, 2026 | — | Form 4 |
| Wang Feng-Ming CEO | Sell | 9,150 | $92.05 | $842.25K | 1.1% | 806,061 | May 26, 2026 | — | Form 4 |
| Young John Alexander CFO | Option exercise | 400 | $55.80 | $22.32K | 0.3% | 118,023 | May 26, 2026 | — | Form 4 |
| Young John Alexander CFO | Sell | 400 | $96.00 | $38.40K | 0.3% | 117,623 | May 26, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Option exercise (M) — Exercise or conversion of an exempt derivative
- Gift (G) — Bona fide gift
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.