SNDK's three largest insider shareholders as of September 12, 2026 are Digital Corp Western (TenPercentOwner, 7.51Mn shares), David Goeckeler (Chairman Ceo, 447.25K shares), Luis Felipe Visoso (Evp Cfo, 131.98K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Digital Corp Western | TenPercentOwner | 7,513,019 | 0 | 7,513,019 | 91.2% | 09 Jun, 2025 |
| 2 | David Goeckeler | Chairman Ceo | 447,248 | 0 | 447,248 | 5.4% | 08 Sep, 2026 |
| 3 | Luis Felipe Visoso | Evp Cfo | 131,976 | 0 | 131,976 | 1.6% | 08 Sep, 2026 |
| 4 | Alper Ilkbahar | Evp Chief Technology Officer | 44,134 | 0 | 44,134 | 0.5% | 08 Sep, 2026 |
| 5 | Bernard Shek | Chief Legal Officer Secty | 25,305 | 0 | 25,305 | 0.3% | 08 Sep, 2026 |
| 6 | Michael Pokorny | Vp, Chief Accounting Officer | 21,092 | 0 | 21,092 | 0.3% | 08 Sep, 2026 |
| 7 | Thomas Caulfield | Director | 2,312 | 14,500 | 16,812 | 0.2% | 05 Mar, 2026 |
| 8 | Miyuki Suzuki | Director | 9,907 | 0 | 9,907 | 0.1% | 26 Feb, 2026 |
| 9 | Kimberly Alexy | Director | 5,401 | 0 | 5,401 | 0.1% | 04 Mar, 2025 |
| 10 | Richard B. Ii Cassidy | Director | 4,914 | 0 | 4,914 | 0.1% | 19 Nov, 2025 |
| 11 | Matthew E Massengill | Director | 4,840 | 0 | 4,840 | 0.1% | 04 Mar, 2025 |
| 12 | Devinder Kumar | Director | 4,769 | 0 | 4,769 | 0.1% | 19 Nov, 2025 |
| 13 | Ellyn Shook | Director | 4,750 | 0 | 4,750 | 0.1% | 19 Nov, 2025 |
| 14 | Necip Sayiner | Director | 2,900 | 0 | 2,900 | 0.0% | 11 May, 2026 |
| 15 | Alexander R. Bradley | Director | 863 | 0 | 863 | 0.0% | 02 Jan, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 03 Sep, 2026 | Bernard Shek | Chief Legal Officer Secty | Disposed F | 2,271 | $1,554.99 | $3.53Mn | 27,613 | Direct |
| 03 Sep, 2026 | Michael Pokorny | Vp, Chief Accounting Officer | Disposed F | 1,283 | $1,554.99 | $2.00Mn | 21,092 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 120 | $1,561.69 | $187.40K | 44,014 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 40 | $1,513.23 | $60.53K | 48,806 | Direct |
| 03 Sep, 2026 | David Goeckeler | Chairman Ceo | Disposed F | 10,540 | $1,554.99 | $16.39Mn | 447,248 | Direct |
| 03 Sep, 2026 | Luis Felipe Visoso | Evp Cfo | Disposed F | 5,838 | $1,554.99 | $9.08Mn | 131,976 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 80 | $1,515.05 | $121.20K | 48,726 | Direct |
| 08 Sep, 2026 | Bernard Shek | Chief Legal Officer Secty | Disposed S | 2,308 | $1,767.33 | $4.08Mn | 25,305 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 200 | $1,563.68 | $312.74K | 43,814 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 52 | $1,517.68 | $78.92K | 48,674 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 40 | $1,564.40 | $62.58K | 43,774 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 40 | $1,571.04 | $62.84K | 43,734 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 68 | $1,519.23 | $103.31K | 48,606 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 80 | $1,520.93 | $121.67K | 48,526 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed F | 3,244 | $1,554.99 | $5.04Mn | 40,490 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 40 | $1,522.10 | $60.88K | 48,486 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 80 | $1,523.61 | $121.89K | 48,406 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 80 | $1,526.81 | $122.14K | 48,326 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 40 | $1,527.58 | $61.10K | 48,286 | Direct |
| 03 Sep, 2026 | Alper Ilkbahar | Evp Chief Technology Officer | Disposed S | 80 | $1,529.71 | $122.38K | 48,206 | Direct |