| Insiders | Shares | % | Avg Price | Total $ | |
|---|---|---|---|---|---|
| Buys | 0 | ||||
| Sells | 2 | -4,771 | 100% | $512.34 | -$2,444,386 |
| Net | -2 | -4,771 | -100% | -$2,444,386 |
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Report Date |
|---|---|---|---|---|---|
| David Goeckeler | Chairman & CEO, Director | $324,918,741 | 25 Feb 2026 | ||
| WESTERN DIGITAL CORP | 10%+ Owner | $315,546,798 | 09 Jun 2025 | ||
| Luis F. Visoso | EVP and CFO | $108,314,900 | 21 Feb 2026 | ||
| Alper Ilkbahar | EVP, Chief Technology Officer | $36,717,247 | 25 Feb 2026 | ||
| Bernard Shek | Chief Legal Officer & Secty | $21,132,242 | 25 Feb 2026 | ||
| Thomas Caulfield | Director | $10,076,104 | 03 Mar 2026 | ||
| Miyuki Suzuki | Director | $6,216,952 | -$2,196,360 | -26% | 25 Feb 2026 |
| Michael Pokorny | VP, Chief Accounting Officer | $5,143,950 | 20 Nov 2025 | ||
| Matthew E. Massengill | Director | $873,319 | 03 Mar 2025 | ||
| Richard B. Cassidy II | Director | $862,554 | 18 Nov 2025 | ||
| Devinder Kumar | Director | $837,102 | 18 Nov 2025 | ||
| Ellyn Shook | Director | $833,767 | 18 Nov 2025 | ||
| Kimberly Alexy | Director | $704,899 | 03 Mar 2025 | ||
| Necip Sayiner | Director | $678,902 | -$248,027 | -27% | 03 Dec 2025 |
| Alexander R. Bradley | Director | $185,579 | 30 Dec 2025 |
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Thomas Caulfield | SNDK | Common Stock | Gift | 14,500 | 14,500 | 03 Mar 2026 | Spouse's Trust | |||
| Thomas Caulfield | SNDK | Common Stock | Gift | -86.2% | -14,500 | 2,312 | 03 Mar 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.63% | -211 | 33,417 | 25 Feb 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.3% | -1,569 | 513,803 | 25 Feb 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.97% | -566 | 58,062 | 25 Feb 2026 | Direct | ||
| Miyuki Suzuki | SNDK | Common Stock | Sale | -26.1% | $2,196,360 | $627.53 | -3,500 | 9,907 | 25 Feb 2026 | Direct |
| Luis F. Visoso | SNDK | Common Stock | Tax liability | -0.95% | -1,594 | 166,646 | 21 Feb 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.32% | -107 | 33,628 | 21 Feb 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.2% | -1,032 | 515,372 | 21 Feb 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.38% | -223 | 58,628 | 21 Feb 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.35% | -117 | 33,735 | 20 Feb 2026 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.25% | -1,300 | 516,404 | 20 Feb 2026 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.21% | -122 | 58,851 | 20 Feb 2026 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.1% | -34 | 33,852 | 20 Jan 2026 | Direct | ||
| Alexander R. Bradley | SNDK | Common Stock | Award | 863 | 863 | 30 Dec 2025 | Direct | |||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.34% | -117 | 33,886 | 20 Dec 2025 | Direct | ||
| Necip Sayiner | SNDK | Common Stock | Sale | -26.8% | $248,027 | $195.14 | -1,271 | 3,479 | 03 Dec 2025 | Direct |
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.62% | -211 | 34,003 | 25 Nov 2025 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.3% | -1,569 | 517,704 | 25 Nov 2025 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -1.1% | -653 | 58,973 | 25 Nov 2025 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Tax liability | -0.94% | -1,588 | 168,240 | 21 Nov 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.31% | -107 | 34,214 | 21 Nov 2025 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.2% | -1,032 | 519,273 | 21 Nov 2025 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.53% | -319 | 59,626 | 21 Nov 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.32% | -109 | 34,321 | 20 Nov 2025 | Direct | ||
| Michael Pokorny | SNDK | Common Stock | Tax liability | -3.03% | -821 | 26,250 | 20 Nov 2025 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.25% | -1,299 | 520,305 | 20 Nov 2025 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -0.27% | -162 | 59,945 | 20 Nov 2025 | Direct | ||
| Miyuki Suzuki | SNDK | Common Stock | Award | 7.88% | 979 | 13,407 | 18 Nov 2025 | Direct | ||
| Ellyn Shook | SNDK | Common Stock | Award | 26% | 979 | 4,750 | 18 Nov 2025 | Direct | ||
| Necip Sayiner | SNDK | Common Stock | Award | 26% | 979 | 4,750 | 18 Nov 2025 | Direct | ||
| Thomas Caulfield | SNDK | Common Stock | Award | 6.18% | 979 | 16,812 | 18 Nov 2025 | Direct | ||
| Richard B. Cassidy II | SNDK | Common Stock | Award | 30.3% | 1,143 | 4,914 | 18 Nov 2025 | Direct | ||
| Devinder Kumar | SNDK | Common Stock | Award | 25.8% | 979 | 4,769 | 18 Nov 2025 | Direct | ||
| Miyuki Suzuki | SNDK | Common Stock | Tax liability | -15.1% | -2,213 | 12,428 | 17 Nov 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -1.04% | -362 | 34,430 | 20 Oct 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.34% | -117 | 34,792 | 20 Sep 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Award | 110.4% | 18,313 | 34,909 | 03 Sep 2025 | Direct | ||
| Michael Pokorny | SNDK | Common Stock | Award | 92.8% | 13,028 | 27,071 | 03 Sep 2025 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Award | 38.4% | 47,090 | 169,828 | 03 Sep 2025 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Award | 19.5% | 85,025 | 521,604 | 03 Sep 2025 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Award | 77.1% | 26,161 | 60,107 | 03 Sep 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -0.47% | -78 | 16,596 | 27 Aug 2025 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.22% | -980 | 436,579 | 27 Aug 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -1.25% | -211 | 16,674 | 25 Aug 2025 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.36% | -1,569 | 437,559 | 25 Aug 2025 | Direct | ||
| Alper Ilkbahar | SNDK | Common Stock | Tax liability | -1.89% | -653 | 33,946 | 25 Aug 2025 | Direct | ||
| Luis F. Visoso | SNDK | Common Stock | Tax liability | -4.92% | -6,353 | 122,738 | 21 Aug 2025 | Direct | ||
| Bernard Shek | SNDK | Common Stock | Tax liability | -2.47% | -428 | 16,885 | 21 Aug 2025 | Direct | ||
| David Goeckeler | SNDK | Common Stock | Tax liability | -0.93% | -4,129 | 439,128 | 21 Aug 2025 | Direct |