Transactions
4
Insider / Sandisk Corp
Caulfield Thomas
Director at Sandisk Corp
- Company
- Sandisk Corp
- Ticker
- SNDK
- First filing on record
- November 19, 2025
- Latest trade on record
- May 12, 2026
- SEC filings
- EDGAR ↗
Caulfield Thomas, Director at Sandisk Corp, has disclosed 4 transactions in SNDK since November 19, 2025: 0 purchases (0 open-market buys) and 0 sales, worth about $0 at the reported prices. The latest was filed May 14, 2026, 2 days after the trade.
Open-market buys
0
Sales
0
Avg. disclosure lag
1.8d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Caulfield Thomas reported 4 transactions that were neither a purchase nor a sale, such as stock awards, option exercises or shares withheld for tax.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 3 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| G | Gift | 3 | 38,666 | — |
| A | Grant or award | 1 | 979 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 3 | 0 | 0 |
| 2025 | 1 | 0 | 0 |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| SNDK | Other G | May 12, 2026 | May 14, 2026 | 2d | 9,666 | — | — | indirect | Form 4 ↗ | |
| SNDK | Other G | March 3, 2026 | March 5, 2026 | 2d | 14,500 | — | — | indirect | Form 4 ↗ | |
| SNDK | Other G | March 3, 2026 | March 5, 2026 | 2d | 14,500 | — | — | Form 4 ↗ | ||
| SNDK | Other A | November 18, 2025 | November 19, 2025 | 1d | 979 | — | — | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| May 14, 2026 | Form 4 | 0001363249-26-000031 | 1 | published | EDGAR ↗ |
| March 5, 2026 | Form 4 | 0001363249-26-000008 | 2 | published | EDGAR ↗ |
| November 19, 2025 | Form 4 | 0001363249-25-000114 | 1 | published | EDGAR ↗ |
Other insiders at Sandisk Corp
- Ilkbahar Alper EVP & Chief Technology Officer 56 rows
- Goeckeler David Chairman & CEO 43 rows
- Bradley Alexander R. Chief Financial Officer 27 rows
- Shek Bernard Chief Legal Officer and Secty 27 rows
- Visoso Luis Felipe EVP & CFO 8 rows
- Suzuki Miyuki Director 7 rows
- Shook Ellyn Director 6 rows
- Pokorny Michael VP, Chief Accounting Officer 5 rows
- Cassidy Richard B. II Director 4 rows
- Sayiner Necip Director 4 rows
Everyone on file, with contracts and lobbying under the company's name: Sandisk Corp.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 3 | 4 | November 19, 2025 | May 14, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.