Massivemarkets

SEC Form 4

Sandisk Corporation (SNDK) insider trading

In the 12 months to Oct 24, 2026, 6 SNDK insiders reported open-market sales of $131.6M across 15 filings; no open-market purchases were filed.

Latest filing · Last 12 months · Source: SEC EDGAR · How we count

Open-market sales
$131.6M
15 filings · 6 insiders
Open-market purchases
$0
0 filings
Pre-arranged sales (10b5-1)
11 of 15
$123.5M of $131.6M sold (94%)

Who traded SNDK, and when

  • Sale
  • Sale, pre-arranged (10b5-1)

SNDK daily close from Oct 24, 2025 to Oct 23, 2026, between $175.53 and $2,335.00, last $1,238.03. 15 sale and 0 purchase filings by 6 insiders, marked at their filing dates. David Goeckeler, Chairman & CEO: sold $105.0M across 2 filings, first filed Sep 16, 2026, last Sep 21, 2026. Alper Ilkbahar, EVP, Chief Technology Officer → EVP & Chief Technology Officer: sold $11.4M across 3 filings, first filed Jun 2, 2026, last Sep 8, 2026. Bernard Shek, Chief Legal Officer & Secty → Chief Legal Officer and Secty: sold $9.0M across 6 filings, first filed Jun 5, 2026, last Oct 2, 2026. Michael Pokorny, VP, Chief Accounting Officer: sold $3.5M across 1 filing, first filed May 14, 2026, last May 14, 2026. Luis Felipe Visoso, EVP & CFO: sold $1.6M across 1 filing, first filed Sep 16, 2026, last Sep 16, 2026. Necip Sayiner, Director: sold $1.1M across 2 filings, first filed Dec 4, 2025, last May 11, 2026.

Largest mark · tap a row for others

David Goeckeler · Chairman & CEO

Filing 1 of 2 within a week · $104,972,834 total

Sale $51,700,130

33,838 shares at $1,527.87 avg

Filed Sep 16, 2026 · traded Sep 14

Pre-arranged (10b5-1) · close on filing date $1,519.97

SNDK daily closelast $1,238.03

David Goeckeler · Chairman & CEO

$105.0M sold

Alper Ilkbahar · EVP, Chief Technology Officer → EVP & Chief Technology Officer

$11.4M sold

Bernard Shek · Chief Legal Officer & Secty → Chief Legal Officer and Secty

$9.0M sold

Michael Pokorny · VP, Chief Accounting Officer

$3.5M sold

Luis Felipe Visoso · EVP & CFO

$1.6M sold

Necip Sayiner · Director

$1.1M sold
One row per insider; marks sit at the SEC filing date, sized by dollar value.

Has the Sandisk Corporation's CEO sold stock?

Yes. David Goeckeler (CEO) sold 67,679 shares ($105.0M) in Sep 2026, all under a pre-arranged 10b5-1 plan.

Open-market trades

15 filings in the last 12 months
InsiderRoleSoldBoughtFilingsPre-arranged (10b5-1)Last filed
David GoeckelerChairman & CEO$105.0M—2100% of sales
Alper IlkbaharEVP, Chief Technology Officer → EVP & Chief Technology Officer$11.4M—369% of sales
Bernard ShekChief Legal Officer & Secty → Chief Legal Officer and Secty$9.0M—6100% of sales
Michael PokornyVP, Chief Accounting Officer$3.5M—1—
Luis Felipe VisosoEVP & CFO$1.6M—1100% of sales
Necip SayinerDirector$1.1M—2—
Other insider activity (not market trades) · 76 records
  • Option exercises1 record
  • Tax withholding58 records
  • Tax withholding (sold to cover)1 record
  • Grants and awards12 records
  • Gifts4 records

Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.

Build this yourself

This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:

Agent prompt

Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for SNDK every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.

How to read this page

Open-market purchase or sale
A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
Pre-arranged (10b5-1)
The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
Role
The title on each filing. Someone whose title changed shows more than one.
Filing date
Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.