David Goeckeler
CIK 1713941 · Chairman & CEO · last filed 2026-09-21
David Goeckeler is a Chairman & CEO who has filed 89 SEC Form 4 insider transactions across 5 companies since 2017. The most recent filing, for SNDK, was dated Sep 21, 2026. Across all open-market trades the lifetime net is −$128.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $819.2M across reported positions. 39 SEC filings were submitted jointly with WESTERN DIGITAL CORP.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
SNDK price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
951 SANDISK DRIVE
MILPITAS, CA 95035
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SNDK | Chairman & CEO | 406,152 | $1238.03 | $502.83M | -$104.97M | 5 | 2026-09-21 |
| Sandisk Corp (SNDKV) Delisted | Chairman and CEO | 509,903 | — | — | $0 | 14 | 2026-05-27 |
| ADP | Director | 6,662 | $304.16 | $2.03M | $0 | 5 | 2025-11-14 |
| WDC | Chief Executive Officer | 812,303 | $343.67 | $279.16M | -$10.72M | 36 | 2024-12-02 |
| CSCO | EVP, Networking and Security | 330,050 | $106.50 | $35.15M | -$12.33M | 25 | 2020-02-20 |
Recent Filings
89 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-21 | SNDK | Mixed | −30,545 | -$53.27M | EDGAR |
| 2026-09-17 | SNDK | Notice (144) | −33,841 | -$51.44M | EDGAR |
| 2026-09-16 | SNDK | Sell (S) | −33,838 | -$51.70M | EDGAR |
| 2026-09-14 | SNDK | Notice (144) | −33,838 | -$55.27M | EDGAR |
| 2026-09-08 | SNDK | Tax (F) | −10,540 | -$16.39M | EDGAR |
| 2026-08-27 | SNDK | Tax (F) | −49,782 | -$73.72M | EDGAR |
| 2026-08-24 | SNDK | Tax (F) | −2,333 | -$3.73M | EDGAR |
| 2026-05-27 | Sandisk Corp (SNDKV) Delisted | Tax (F) | −1,569 | -$2.32M | EDGAR |
| 2026-05-22 | Sandisk Corp (SNDKV) Delisted | Tax (F) | −2,331 | -$3.40M | EDGAR |
| 2026-02-27 | Sandisk Corp (SNDKV) Delisted | Tax (F) | −1,569 | -$992.2K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.