Ambarella ($AMBA) Insider Trading & Smart Money Activity
Ambarella, Inc. ($AMBA) has 11 insider trades and 5 13F position changes on file. In the last 12 months on the open market, no insider bought and 8 insiders sold ($1.75M), net -$1.75M.
- Insider buyers (12 mo)
- 0
- Insider sellers (12 mo)
- 8
- Net insider $ (12 mo)
- -$1.75M
- Congress trades (12 mo)
- 0
- 13F moves on file
- 5
- Analyst ratings on file
- 0
AMBA insider buying and selling by quarter
| Quarter | Insider buys | Insider sales | Congress buys / sales | 13F added / cut |
|---|---|---|---|---|
| Q1 2026 | 0 | 0 | 0 / 0 | 0 / 0 |
| Q2 2026 | 0 | 4 · $692.63K | 0 / 0 | 3 / 2 |
| Q3 2026 | 0 | 6 · $1.06M | 0 / 0 | 0 / 0 |
| Q4 2026 | 0 | 0 | 0 / 0 | 0 / 0 |
Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.
All AMBA insider, congress, 13F and analyst activity
| Date | Source | Who | Action | Shares | Value / amount | ΔOwn | 1W | 1M | 6M | Filing | Story |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Insider | Paisley Christopher BDirector | Sell (Open-market sale) 10b5-1 | 250 sh | $17.69K | -5.5% | — | |||||
| Insider | Young John AlexanderCFO | Sell (Open-market sale) 10b5-1 | 1.90K sh | $127.56K | +9.9% | — | |||||
| Insider | Young John AlexanderCFO | Sell (Open-market sale) | 3.13K sh | $202.66K | +4.4% | — | |||||
| Insider | Wang Feng-MingCEO | Sell (Open-market sale) | 6.09K sh | $394.56K | +4.4% | — | |||||
| Insider | Lee Chan WChief Operations Officer | Sell (Open-market sale) | 2.89K sh | $187.55K | +4.4% | — | |||||
| Insider | Ju Chi-HongSenior VP, Systems & GM | Sell (Open-market sale) | 2.01K sh | $130.24K | +4.4% | — | |||||
| Insider | Christopher Paisley | Sell (Open-market sale) 10b5-1 | 250 sh | $15.50K | +28.3% | +9.8% | — | ||||
| Insider | Young John AlexanderCFO | Sell (Open-market sale) 10b5-1 | 5.03K sh | $339.95K | -4.4% | -6.1% | — | ||||
| Insider | Feng-Ming WangCEO | Sell (Gift) | 10K sh | -4.4% | -6.1% | — | |||||
| Insider | Chan LeeChief Operations Officer | Sell (Open-market sale) | 2.95K sh | $200.28K | -4.4% | -6.1% | — | ||||
| Insider | Chi-Hong JuSenior VP, Systems & GM | Sell (Open-market sale) | 2.02K sh | $136.89K | -4.4% | -6.1% | — | ||||
| 13F | Squarepoint Ops | Reduced | -333.17K sh | $37.45M | +7.9% | -13.6% | — | ||||
| 13F | Point72 Asset Management, L.P. | Reduced | -250.82K sh | $42.37M | +7.9% | -13.6% | Read | ||||
| 13F | Millennium Management | Added | +1.34M sh | $122.97M | +7.9% | -13.6% | — | ||||
| 13F | Manufacturers Life Insurance Company, the | Added | +524.94K sh | $128.95M | +7.9% | -13.6% | — | ||||
| 13F | Walleye Capital | Added | +201.77K sh | $17.15M | -1.1% | -21.4% | — |
1W / 1M / 6M = how AMBA moved from the trade or filing date.
Insider trading in AMBA: who is buying and selling
| Insider | Role | Trades | Open-market net | Shares held | Last trade |
|---|---|---|---|---|---|
| Paisley Christopher B | Director | 1 | -$17.69K | Sep 25, 2026 | |
| Young John Alexander | CFO | 3 | -$670.17K | Sep 18, 2026 | |
| Wang Feng-Ming | CEO | 1 | -$394.56K | Sep 17, 2026 | |
| Lee Chan W | Chief Operations Officer | 1 | -$187.55K | Sep 17, 2026 | |
| Ju Chi-Hong | Senior VP, Systems & GM | 1 | -$130.24K | Sep 17, 2026 | |
| Christopher Paisley | 1 | -$15.50K | Jun 26, 2026 | ||
| Feng-Ming Wang | CEO | 1 | — | Jun 17, 2026 | |
| Chan Lee | Chief Operations Officer | 1 | -$200.28K | Jun 17, 2026 | |
| Chi-Hong Ju | Senior VP, Systems & GM | 1 | -$136.89K | Jun 17, 2026 |
Institutions moving AMBA (13F)
Frequently asked questions
Are AMBA insiders buying or selling?
Over the last 12 months 0 insiders made 0 open-market purchases worth $0 and 8 insiders made 10 open-market sales worth $1.75M, a net -$1.75M.
What is the latest insider trade in AMBA?
Paisley Christopher B, Director filed a sell (open-market sale) of 250 sh worth $17.69K on Sep 25, 2026.
Which institutions changed their AMBA positions?
Recent 13F filers moving the stock include Squarepoint Ops, Point72 Asset Management, L.P., Millennium Management, Manufacturers Life Insurance Company, the and Walleye Capital.
Other semiconductor equipment & materials stocks
Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.
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