Greedy Insider
AMBARELLA INC (AMBA) Insider Trades and Scores
AMBARELLA INC (AMBA) insider trades: since Dec 16, 2025, Greedy Insider recorded 0 open-market buys and 43 sales on Form 4 from 7 insiders. The strongest recent filing scored 86 (Strong).
Who bought and who sold
Across the last 43 scoreable Form 4 transactions in AMBA, 0 were open-market purchases and 43 were sales. The table lists the most recent filings with each one's Greediness Score, so the structurally unusual trades are easy to spot first.
| Insider | Role | Type | Shares | Date | Score | ||
|---|---|---|---|---|---|---|---|
| PAISLEY CHRISTOPHER B | Director | Sell | 250.0 | 17690.0 | 2026-09-25 | 64 | View |
| Young John Alexander | CFO | Sell | 1896.0 | 127562.88 | 2026-09-18 | 79 | View |
| Young John Alexander | CFO | Sell | 3126.0 | 202658.58 | 2026-09-17 | 81 | View |
| Lee Chan W | Chief Operations Officer | Sell | 2893.0 | 187553.19 | 2026-09-17 | 78 | View |
| Ju Chi-Hong | Senior VP, Systems & GM | Sell | 2009.0 | 130243.47 | 2026-09-17 | 66 | View |
| Wang Feng-Ming | CEO | Sell | 6086.0 | 394555.38 | 2026-09-17 | 75 | View |
| Chen Yun-Lung | VP, Business Dev. & Marketing | Sell | 5958.0 | 468656.28 | 2026-07-09 | 63 | View |
| Wang Feng-Ming | CEO | Sell | 16250.0 | 1463800.0 | 2026-07-01 | 82 | View |
| Ju Chi-Hong | Senior VP, Systems & GM | Sell | 10000.0 | 888400.0 | 2026-07-01 | 77 | View |
| PAISLEY CHRISTOPHER B | Director | Sell | 250.0 | 15502.5 | 2026-06-26 | 68 | View |
The strongest recent filing
Young John Alexander (CFO) sold 3,791 shares of AMBARELLA INC on Dec 18, 2025, a filing that scored 86 (Strong). It scored Strong because a senior insider was trading and it was direct personal ownership. The score describes the filing, not future returns. This is not investment advice.
Cluster activity
A cluster buy is present: 5 insiders (Young John Alexander, Lee Chan W, Ju Chi-Hong, Wang Feng-Ming) traded AMBA the same direction within a 7-day window. Shared conviction is a stronger structural signal than a lone trade.
How this compares with AMBARELLA INC's own history
Open-market buys make up 0% of the 43 scoreable AMBA transactions on record between Dec 16, 2025 and Sep 25, 2026. Comparing a filing with the company's own buy/sell mix is how you tell a routine disposal from an unusual accumulation.
Methodology and sources
Scores come from six published, user-adjustable factors (insider role, cluster activity, trade size versus the insider's own history, position impact, filing urgency, and direct versus indirect ownership). The score describes the filing, not future returns. This is not investment advice.
Key facts
- Scoreable Form 4 transactions on record: 43
- Open-market buys: 0
- Sales: 43
- Distinct insiders: 7
- Strongest recent Greediness Score: 86 (Strong)
Primary sources
Related
- Strongest filing
- AMBA in the live feed
- How the Greediness Score works
- What is a cluster buy?
- Form 4 transaction codes
The score describes the filing, not future returns. This is not investment advice.