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Insider Trading

Last Updated: 6 days, 1 hour ago

David Goeckeler has an estimated net worth of at least $692.1 million*, as of Sept. 16, 2026. They own 416,706 shares of SNDK stock. They have sold 217,679 shares of SNDK stock since 2021, for an estimated $0.

David Goeckeler $SNDK SEC Form 4 Insider Trading

David Goeckeler has filed a total of 28 insider trades in $SNDK since 2021. Their most recent trade was a sale of 165 shares, made on Sep 17, 2026. Their largest trade was a sale of 14,364 shares, made on Sep 14, 2026. We estimate that they now own 416,706 shares of $SNDK, worth an estimated $692.1 million.



Insider Trading at $SNDK

There have been a total of 74 insider trades reported at $SNDK since 2021, with 0 shares purchased and 87,716 shares sold. The most active insider traders in $SNDK stock have been Alper Ilkbahar, David Goeckeler, and Bernard Shek. The most recent trade was a sale of 4,139 shares reported by David Goeckeler (Chairman & CEO), made on Sep 17, 2026.



History of Insider Stock Trades by David Goeckeler

Company Ticker Purchase / Sale Shares Date Disclosed (EST)
SNDK logo SNDK Sale 165 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 40 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 9,604 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 910 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 4,558 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 1,157 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 306 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 2,588 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 2,778 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 4,139 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 2,876 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 640 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 1,480 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 1,080 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 1,520 Sep 17, 2026 Sept. 21, 2026, 6:18 p.m.
SNDK logo SNDK Sale 360 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 1,480 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 864 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 14,364 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 181 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 3,075 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 2,280 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 4,080 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 359 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 1,200 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 700 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 1,695 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
SNDK logo SNDK Sale 3,200 Sep 14, 2026 Sept. 16, 2026, 7:58 p.m.
WDC logo WDC Sale 75,000 Oct 25, 2024 Oct. 28, 2024, 6:37 p.m.
WDC logo WDC Sale 75,000 Sep 26, 2024 Sept. 27, 2024, 5:32 p.m.




$SNDK Executives and Stock Owners with Insider Trades



*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.