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 |
|---|---|---|---|---|---|---|---|---|
| SNDK | Visoso Luis Felipe | EVP & CFO | 09/15/2026 | Verkauf | 1,568.83 | 1,000 | 1,568,830 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,541.88 | 360 | 555,077 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,540.78 | 864 | 1,331,234 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,539.19 | 1,480 | 2,278,001 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,537.68 | 3,200 | 4,920,568 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,535.96 | 1,695 | 2,603,457 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,535.12 | 700 | 1,074,582 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,532.17 | 1,200 | 1,838,604 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,529.36 | 359 | 549,040 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,528.45 | 4,080 | 6,236,061 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,526.45 | 2,280 | 3,480,298 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,524.27 | 3,075 | 4,687,123 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,522.87 | 181 | 275,639 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/14/2026 | Verkauf | 1,522.59 | 14,364 | 21,870,445 | Form 4 |
| SNDK | Shek Bernard | Chief Legal Officer & Secty | 09/08/2026 | Verkauf | 1,767.33 | 2,308 | 4,078,998 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Steuer-Abgabe | 1,554.99 | 3,244 | 5,044,388 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,563.68 | 200 | 312,737 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,555.57 | 78 | 121,334 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,543.76 | 2,594 | 4,004,522 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,537.49 | 160 | 245,998 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,561.69 | 120 | 187,403 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,519.23 | 68 | 103,308 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,517.68 | 52 | 78,919 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,557.79 | 80 | 124,623 | Form 4 |
| SNDK | Ilkbahar Alper | EVP & Chief Technology Officer | 09/03/2026 | Verkauf | 1,571.04 | 40 | 62,842 | Form 4 |
| SNDK | Shek Bernard | Chief Legal Officer & Secty | 09/03/2026 | Steuer-Abgabe | 1,554.99 | 2,271 | 3,531,382 | Form 4 |
| SNDK | Goeckeler David | Chairman & CEO | 09/03/2026 | Steuer-Abgabe | 1,554.99 | 10,540 | 16,389,595 | Form 4 |
| SNDK | Visoso Luis Felipe | EVP & CFO | 09/03/2026 | Steuer-Abgabe | 1,554.99 | 5,838 | 9,078,032 | Form 4 |
| SNDK | Pokorny Michael | VP, Chief Accounting Officer | 09/03/2026 | Steuer-Abgabe | 1,554.99 | 1,283 | 1,995,052 | Form 4 |
| SNDK | Shek Bernard | Chief Legal Officer & Secty | 09/01/2026 | Verkauf | 1,525.60 | 600 | 915,360 | Form 4 |
| SNDK | Shek Bernard | Chief Legal Officer & Secty | 08/25/2026 | Steuer-Abgabe | 1,480.77 | 212 | 313,923 | Form 4 |
| SNDK | Goeckeler David | Chairman and CEO | 08/25/2026 | Steuer-Abgabe | 1,480.77 | 49,782 | 73,715,692 | Form 4 |
| SNDK | Ilkbahar Alper | EVP, Chief Technology Officer | 08/25/2026 | Steuer-Abgabe | 1,480.77 | 654 | 968,424 | Form 4 |
| SNDK | Ilkbahar Alper | EVP, Chief Technology Officer | 08/21/2026 | Steuer-Abgabe | 1,596.08 | 320 | 510,746 | Form 4 |
| SNDK | Visoso Luis Felipe | EVP & CFO | 08/21/2026 | Steuer-Abgabe | 1,596.08 | 1,589 | 2,536,171 | Form 4 |
| SNDK | Goeckeler David | Chairman and CEO | 08/21/2026 | Steuer-Abgabe | 1,596.08 | 1,033 | 1,648,751 | Form 4 |
| SNDK | Shek Bernard | Chief Legal Officer & Secty | 08/21/2026 | Steuer-Abgabe | 1,596.08 | 108 | 172,377 | Form 4 |
| SNDK | Ilkbahar Alper | EVP, Chief Technology Officer | 08/20/2026 | Steuer-Abgabe | 1,600.62 | 163 | 260,901 | Form 4 |
| SNDK | Ilkbahar Alper | EVP, Chief Technology Officer | 08/20/2026 | Steuer-Abgabe | 1,600.62 | 276 | 441,771 | Form 4 |
| SNDK | Ilkbahar Alper | EVP, Chief Technology Officer | 08/20/2026 | Optionsausübung | — | 276 | — | Form 4 |
| SNDK | Visoso Luis Felipe | EVP & CFO | 08/20/2026 | Steuer-Abgabe | 1,600.62 | 25,655 | 41,063,906 | Form 4 |
| SNDK | Goeckeler David | Chairman and CEO | 08/20/2026 | Steuer-Abgabe | 1,600.62 | 1,300 | 2,080,806 | Form 4 |
| SNDK | Shek Bernard | Chief Legal Officer & Secty | 08/20/2026 | Steuer-Abgabe | 1,600.62 | 111 | 177,669 | Form 4 |
| SNDK | Shek Bernard | Chief Legal Officer & Secty | 08/03/2026 | Verkauf | 1,162.16 | 600 | 697,296 | Form 4 |
A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).