Sandisk Corp (SNDK)
Data as of , from SEC Form 4 filings.
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About Sandisk Corp (SNDK)
Sandisk is one of the five largest suppliers of NAND flash memory semiconductors globally. Sandisk is vertically integrated, producing substantially all of its flash chips at manufacturing sites across Japan via a joint-venture framework with Kioxia. Sandisk then repackages most of its chips into SSDs for consumer electronics, external storage, or cloud storage. Sandisk was formerly a piece of Western Digital for nine years (after being acquired in 2016) and was spun off as an independent company in 2025.
- MILPITAS, CA
- 11,100
- 2025
- XNAS
SNDK Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 37 | 73,187 | $113.90M |
| Grant or award | 5 | 8,009 | |
| Option exercise | 2 | 552 | |
SNDK insider transactions (Form 4)
4081 Form 4 filings on record, the earliest from Jun 9, 2025, newest first. Filing history page 2 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 109 footnote F1 | $1,392.56 | $152K | |
| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 107 footnote F1 | $1,542.24 | $165K | |
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| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,299 footnote F1 | $1,392.56 | $1.81M | |
| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,032 footnote F1 | $1,542.24 | $1.59M | |
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| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 162 footnote F1 | $1,392.56 | $226K | |
| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 319 footnote F1 | $1,542.24 | $492K | |
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| Michael Pokorny - Officer | Open-market sale | Common Stock | 2,446 | $1,426.18 | $3.49M | |
| Thomas Caulfield - Director | Gift | Common Stock | 9,666 | $0.00 | - | |
| Necip Sayiner - Director | Open-market sale | Common Stock | 579 | $1,503.11 | $870K | |
| Michael Pokorny - Officer | Tax withholding / forfeiture | Common Stock | 1,429 footnote F1 | $1,562.34 | $2.23M | |
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| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 41 footnote F1 | $913.02 | $37K | |
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| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 2,251 footnote F1 | $913.02 | $2.06M | |
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| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 117 footnote F1 | $709.71 | $83K | |
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| Thomas Caulfield - Director | Gift | Common Stock | 14,500 | $0.00 | - | |
| Thomas Caulfield - Director | Gift | Common Stock | 14,500 | $0.00 | - | |
| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 211 footnote F1 | $632.38 | $133K | |
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| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,569 footnote F1 | $632.38 | $992K | |
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| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 566 footnote F1 | $632.38 | $358K | |
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| Miyuki Suzuki - Director | Open-market sale | Common Stock | 3,500 | $627.53 footnote F2 | $2.20M | |
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| Luis Felipe Visoso - Officer | Tax withholding / forfeiture | Common Stock | 1,594 footnote F1 | $649.97 | $1.04M | |
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| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 117 footnote F1 | $649.97 | $76K | |
| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 107 footnote F1 | $649.97 | $70K | |
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| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,300 footnote F1 | $649.97 | $845K | |
| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,032 footnote F1 | $649.97 | $671K | |
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| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 122 footnote F1 | $649.97 | $79K | |
| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 223 footnote F1 | $649.97 | $145K | |
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| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 34 footnote F1 | $453.12 | $15K | |
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| Necip Sayiner - Director | Open-market sale | Common Stock | 1,271 | $195.14 | $248K | |
| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 211 footnote F1 | $220.50 | $47K | |
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| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 653 footnote F1 | $220.50 | $144K | |
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| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,569 footnote F1 | $220.50 | $346K | |
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| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 109 footnote F1 | $195.96 | $21K | |
| Bernard Shek - Officer | Tax withholding / forfeiture | Common Stock | 107 footnote F1 | $200.27 | $21K | |
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| Michael Pokorny - Officer | Tax withholding / forfeiture | Common Stock | 821 footnote F1 | $195.96 | $161K | |
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| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 162 footnote F1 | $195.96 | $32K | |
| Alper Ilkbahar - Officer | Tax withholding / forfeiture | Common Stock | 319 footnote F1 | $200.27 | $64K | |
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| Luis Felipe Visoso - Officer | Tax withholding / forfeiture | Common Stock | 1,588 footnote F1 | $200.27 | $318K | |
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| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,299 footnote F1 | $195.96 | $255K | |
| David Goeckeler - Officer | Tax withholding / forfeiture | Common Stock | 1,032 footnote F1 | $200.27 | $207K | |
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| Richard B. Cassidy II - Director | Grant or award | Common Stock | 1,143 footnote F1 | $0.00 | - | |
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Item 5.02
Item 1.01, 9.01
Item 2.02, 8.01, 9.01
Item 8.01, 9.01
Recent SNDK Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| DAVID GOECKELER | Director, Officer | 33,841 | $51.44M | View on EDGAR | |
| LUIS VISOSO | Officer | 3,000 |
Stock trades in SNDK disclosed by members of the U.S. House in the last 12 months, newest first. Values are the ranges as filed.
| Member | Type | Traded | Disclosed | Value range | Owner | Days to disclose | Filing |
|---|---|---|---|---|---|---|---|
 Josh GottheimerDemocrat, NJ-05 | Purchase |
SNDK insider trading FAQ
What is the latest insider trade for SNDK?
Sandisk Corp (SNDK) had 22 insider filings in the last 90 days, with the most recent on 2026-10-03. The full record for SNDK runs to 81 Form 4 filings, the earliest from 2025-06-09. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying SNDK stock?
No insider purchases of SNDK were filed in the last 90 days.
How many insiders are selling SNDK stock?
37 insider sales of SNDK were filed in the last 90 days, totaling $113.90M.
Where can I see SNDK SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects SNDK Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Bernard Shek view on EDGAR
- - Michael Pokorny view on EDGAR
- - Luis Felipe Visoso view on EDGAR
- - David Goeckeler view on EDGAR
- - Bernard Shek view on EDGAR
- - Alper Ilkbahar view on EDGAR
- - Luis Felipe Visoso view on EDGAR
- - David Goeckeler view on EDGAR
- - Alper Ilkbahar view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Information Technology
- Where SNDK's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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