Insider Trading
Current insider transactions (SEC Form 4) — buys and sells by officers, directors, and major shareholders.
| Ticker | Insider | Title | Date | Transaction | Price ($) | Shares | Value ($) | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|
| AMBR | Wu Yuao | Chief Executive Officer | 09/30/2026 | J | — | 4,081,011 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 09/30/2026 | J | — | 1,360,337 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 06/11/2026 | J | — | 4,536,770 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 06/10/2026 | J | — | 19,753,953 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 06/04/2026 | J | — | 18,147,222 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 06/02/2026 | J | — | 6,225,342 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 06/02/2026 | J | — | 11,729,691 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 05/29/2026 | J | — | 4,620,646 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 05/29/2026 | J | — | 6,698,479 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 05/29/2026 | J | — | 19,458,931 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 05/29/2026 | J | — | 69,552,266 | — | Form 4 |
| AMBR | Wu Yuao | Chief Executive Officer | 05/29/2026 | J | — | 309,834,748 | — | Form 4 |
A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).