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 |
|---|---|---|---|---|---|---|---|---|
| CTKB | McCombe William D. | Chief Financial Officer | 08/18/2026 | Steuer-Abgabe | 4.67 | 5,401 | 25,223 | Form 4 |
| CTKB | McCombe William D. | Chief Financial Officer | 08/18/2026 | Optionsausübung | — | 16,049 | — | Form 4 |
| CTKB | McCombe William D. | Chief Financial Officer | 08/18/2026 | Steuer-Abgabe | 4.67 | 4,392 | 20,511 | Form 4 |
| CTKB | McCombe William D. | Chief Financial Officer | 08/18/2026 | Optionsausübung | — | 13,051 | — | Form 4 |
| CTKB | McCombe William D. | Chief Financial Officer | 08/18/2026 | Steuer-Abgabe | 4.67 | 2,111 | 9,858 | Form 4 |
| CTKB | McCombe William D. | Chief Financial Officer | 08/18/2026 | Optionsausübung | — | 6,320 | — | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Steuer-Abgabe | 4.67 | 3,463 | 16,172 | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Optionsausübung | — | 14,220 | — | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Steuer-Abgabe | 4.67 | 1,501 | 7,010 | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Optionsausübung | — | 6,162 | — | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Steuer-Abgabe | 4.67 | 1,346 | 6,286 | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Optionsausübung | — | 5,525 | — | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Steuer-Abgabe | 4.67 | 1,778 | 8,303 | Form 4 |
| CTKB | Yan Ming | CHIEF TECHNOLOGY OFFICER | 08/18/2026 | Optionsausübung | — | 7,363 | — | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Steuer-Abgabe | 4.67 | 20,956 | 97,865 | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Optionsausübung | — | 57,212 | — | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Steuer-Abgabe | 4.67 | 7,062 | 32,980 | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Optionsausübung | — | 29,002 | — | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Steuer-Abgabe | 4.67 | 5,382 | 25,134 | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Optionsausübung | — | 22,100 | — | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Steuer-Abgabe | 4.67 | 2,869 | 13,398 | Form 4 |
| CTKB | Jiang Wenbin | PRESIDENT AND CEO | 08/18/2026 | Optionsausübung | — | 11,781 | — | Form 4 |
| CTKB | Holder Michael | Director | 08/18/2026 | Optionsausübung | — | 2,181 | — | Form 4 |
| CTKB | Chin Richard | Director | 08/18/2026 | Optionsausübung | — | 6,107 | — | Form 4 |
| CTKB | Muir Glenn P | Director | 08/18/2026 | Optionsausübung | — | 3,086 | — | Form 4 |
A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).