Transactions
56
Insider / Sandisk Corp
Ilkbahar Alper
EVP & Chief Technology Officer at Sandisk Corp
- Company
- Sandisk Corp
- Ticker
- SNDK
- First filing on record
- November 24, 2025
- Latest trade on record
- September 17, 2026
- SEC filings
- EDGAR ↗
Ilkbahar Alper, EVP & Chief Technology Officer at Sandisk Corp, has disclosed 56 transactions in SNDK since November 24, 2025: 0 purchases (0 open-market buys) and 52 sales, worth about $23.2M at the reported prices. The latest was filed September 21, 2026, 4 days after the trade; 35 filings were late against the 2-business-day Form 4 deadline.
Open-market buys
0
Sales
52
Avg. disclosure lag
4.0d
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 Ilkbahar Alper made no purchases and 52 sales worth $23M, plus 4 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Ilkbahar Alper has traded 1 stock on record; the largest by dollars is SNDK.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
2 of 13 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 |
|---|---|---|---|---|
| S | Open-market sale | 37 | 7,112 | $11.4M |
| F | Shares withheld for tax | 15 | 10,087 | $11.8M |
| M | Option exercise or conversion | 2 | 552 | — |
| A | Grant or award | 1 | 1,619 | — |
| G | Gift | 1 | 2,694 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 53 | 0 | 49 · $22.9M |
| 2025 | 3 | 0 | 3 · $240K |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| SNDK | Other A | September 17, 2026 | September 21, 2026 | 4d | 1,619 | — | — | Form 4 ↗ | ||
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,559 | $62K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,558 | $125K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 78 | $1,556 | $121K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,554 | $62K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 120 | $1,553 | $186K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,550 | $62K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,549 | $62K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,547 | $124K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,546 | $124K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 2,594 | $1,544 | $4.0M | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,543 | $123K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,541 | $123K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,540 | $123K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,538 | $123K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 160 | $1,537 | $246K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,536 | $123K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,534 | $123K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 120 | $1,534 | $184K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,532 | $61K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,531 | $122K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,530 | $122K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,528 | $61K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,527 | $122K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,524 | $122K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,522 | $61K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,521 | $122K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 68 | $1,519 | $103K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 52 | $1,518 | $79K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 80 | $1,515 | $121K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,513 | $61K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell F | September 3, 2026 | September 8, 2026 | 5d | 3,244 | $1,555 | $5.0M | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,571 | $63K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 40 | $1,564 | $63K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 200 | $1,564 | $313K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell S | September 3, 2026 | September 8, 2026 | 5d | 120 | $1,562 | $187K | late10b5-1 plan | Form 4 ↗ | |
| SNDK | Sell F | August 25, 2026 | August 27, 2026 | 2d | 654 | $1,481 | $968K | Form 4 ↗ | ||
| SNDK | Option / conversion M | August 20, 2026 | August 24, 2026 | 4d | 276 | — | — | derivative | Form 4 ↗ | |
| SNDK | Sell F | August 21, 2026 | August 24, 2026 | 3d | 320 | $1,596 | $511K | Form 4 ↗ | ||
| SNDK | Sell F | August 20, 2026 | August 24, 2026 | 4d | 163 | $1,601 | $261K | Form 4 ↗ | ||
| SNDK | Sell F | August 20, 2026 | August 24, 2026 | 4d | 276 | $1,601 | $442K | Form 4 ↗ | ||
| SNDK | Option / conversion M | August 20, 2026 | August 24, 2026 | 4d | 276 | — | — | Form 4 ↗ | ||
| SNDK | Other G | June 2, 2026 | June 2, 2026 | 0d | 2,694 | — | — | Form 4 ↗ | ||
| SNDK | Sell S | June 1, 2026 | June 2, 2026 | 1d | 600 | $1,758 | $1.1M | Form 4 ↗ | ||
| SNDK | Sell S | June 1, 2026 | June 2, 2026 | 1d | 401 | $1,757 | $705K | Form 4 ↗ | ||
| SNDK | Sell S | June 1, 2026 | June 2, 2026 | 1d | 999 | $1,755 | $1.8M | Form 4 ↗ | ||
| SNDK | Sell F | May 25, 2026 | May 27, 2026 | 2d | 653 | $1,479 | $966K | Form 4 ↗ | ||
| SNDK | Sell F | May 21, 2026 | May 22, 2026 | 1d | 319 | $1,542 | $492K | Form 4 ↗ | ||
| SNDK | Sell F | May 20, 2026 | May 22, 2026 | 2d | 162 | $1,393 | $226K | Form 4 ↗ | ||
| SNDK | Sell F | April 20, 2026 | April 21, 2026 | 1d | 2,251 | $913 | $2.1M | Form 4 ↗ | ||
| SNDK | Sell F | February 25, 2026 | February 27, 2026 | 2d | 566 | $632 | $358K | Form 4 ↗ | ||
| SNDK | Sell F | February 21, 2026 | February 24, 2026 | 3d | 223 | $650 | $145K | Form 4 ↗ | ||
| SNDK | Sell F | February 20, 2026 | February 24, 2026 | 4d | 122 | $650 | $79K | Form 4 ↗ | ||
| SNDK | Sell F | November 25, 2025 | November 26, 2025 | 1d | 653 | $221 | $144K | Form 4 ↗ | ||
| SNDK | Sell F | November 21, 2025 | November 24, 2025 | 3d | 319 | $200 | $64K | Form 4 ↗ | ||
| SNDK | Sell F | November 20, 2025 | November 24, 2025 | 4d | 162 | $196 | $32K | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| September 21, 2026 | Form 4 | 0001242648-26-000039 | 1 | published | EDGAR ↗ |
| September 8, 2026 | Form 4 | 0001242648-26-000029 | 5 | published | EDGAR ↗ |
| September 8, 2026 | Form 4 | 0001242648-26-000028 | 30 | published | EDGAR ↗ |
| August 27, 2026 | Form 4 | 0001363249-26-000070 | 1 | published | EDGAR ↗ |
| August 24, 2026 | Form 4 | 0001363249-26-000066 | 5 | published | EDGAR ↗ |
| June 2, 2026 | Form 4 | 0001363249-26-000048 | 4 | published | EDGAR ↗ |
| May 27, 2026 | Form 4 | 0001363249-26-000044 | 1 | published | EDGAR ↗ |
| May 22, 2026 | Form 4 | 0001363249-26-000037 | 2 | published | EDGAR ↗ |
| April 21, 2026 | Form 4 | 0001363249-26-000023 | 1 | published | EDGAR ↗ |
| February 27, 2026 | Form 4 | 0001242648-26-000014 | 1 | published | EDGAR ↗ |
| February 24, 2026 | Form 4 | 0001242648-26-000005 | 2 | published | EDGAR ↗ |
| November 26, 2025 | Form 4 | 0001363249-25-000131 | 1 | published | EDGAR ↗ |
| November 24, 2025 | Form 4 | 0001363249-25-000123 | 2 | published | EDGAR ↗ |
Other insiders at Sandisk Corp
- 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
- Caulfield Thomas 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.
- Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
- Options and derivatives on Form 4 Table I = shares. Table II = options and other derivatives.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 13 | 56 | November 24, 2025 | September 21, 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.