Sandisk (SNDK) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
Sandisk Corporation (SNDK) insider buying and selling: no purchases, 16 sales
101 Form 4 Table I transactions filed with the SEC by Sandisk Corporation insiders between 2025-08-27 and 2026-10-02 (15-month history): 0 open-market purchases and 16 sales, plus 85 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $53.3M by Goeckeler David on 2026-09-17.
Sandisk insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Sandisk insiders filed 16 sales worth $133.8M on the open market, and no purchases.
The biggest seller was Goeckeler David (Chairman & CEO): $105.0M in 2 sales, out of 7 different sellers.
The largest trade of the period was a sale of $53.3M on Sep 17, 2026, by Goeckeler David (Chairman & CEO), under a 10b5-1 plan. Form 4 on sec.gov (0001242648-26-000041).
Of the 16 sales, 11 (69%, $123.5M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 5 do not.
The last three months show 9 sales, against 5 in the three before. The latest sale from Oct 1, 2026.
Against its sector (Technology, 85 companies with an insider page on this site), over the same dates the median is 22 sales and 0 purchases on the open market. Sandisk has more sales than 33 of the other 84, ranks 22 of 85 by net dollars sold, and 32 of the 85 have at least one purchase.
The 20 most important trades
With no open-market purchases, the table starts with SNDK's sales, largest first. The full history is in the tool above, already searched.
See all 101 SNDK trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-09-17 | 2026-09-21 | Goeckeler David | Chairman & CEO | $53.3M | S — Open-market sale (scheduled 10b5-1)15 Form 4 footnotesF2 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 29, 2026. F3 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1567.00 to a high of $1567.49. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F4 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1568.44 to a high of $1569.03. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F5 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1569.605 to a high of $1570.56. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F6 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1570.62 to a high of $1571.61. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F7 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1571.74 to a high of $1572.66. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F8 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1572.92 to a high of $1573.71. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F9 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1574.24 to a high of $1575.11. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F10 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1575.30 to a high of $1576.20. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F11 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1576.59 to a high of $1577.00. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F12 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1577.90 to a high of $1578.66. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F13 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1579.00 to a high of $1579.72. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F14 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1580.06 to a high of $1580.51. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F15 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1583.65 to a high of $1584.00. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F16 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1585.04 to a high of $1586.01. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-09-14 | 2026-09-16 | Goeckeler David | Chairman & CEO | $51.7M | S — Open-market sale (scheduled 10b5-1)10 Form 4 footnotesF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 29, 2026. F2 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1521.85 to a high of $1522.75. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F3 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1524.00 to a high of $1524.66. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F4 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1526.42 to a high of $1526.48. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F5 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1528.00 to a high of $1528.56. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F6 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1534.60 to a high of $1535.58. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F7 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1535.92 to a high of $1536.36. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F8 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1537.60 to a high of $1537.83. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F9 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1540.30 to a high of $1541.00. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F10 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1541.88 to a high of $1541.89. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-09-03 | 2026-09-08 | Ilkbahar Alper | EVP & Chief Technology Officer | $7.3M | S — Open-market sale (scheduled 10b5-1)23 Form 4 footnotesF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2026. F2 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1514.89 to a high of $1515.20. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F3 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1517.68 to a high of $1517.69. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F4 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1518.79 to a high of $1519.54. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F5 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1520.47 to a high of $1521.39. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F6 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1523.40 to a high of $1523.81 The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F7 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1526.57 to a high of $1527.05. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F8 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1529.22 to a high of $1530.19. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F9 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1530.45 to a high of $1530.59. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F10 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1533.17 to a high of $1534.14. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F11 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1534.17 to a high of $1534.79. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F12 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1535.28 to a high of $1536.03. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F13 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1537.18 to a high of $1537.90. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F14 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1538.34 to a high of $1538.48. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F15 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1539.46 to a high of $1539.76. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F16 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1540.85 to a high of $1541.16. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F17 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1542.65 to a high of $1542.70. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F18 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1543.75 to a high of $1544.62. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F19 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1545.94 to a high of $1546.10. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F20 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1547.04 to a high of $1547.88. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F21 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1552.99 to a high of $1553.86. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F22 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1555.48 to a high of $1555.66. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F23 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1557.62 to a high of $1557.95. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-09-08 | 2026-09-08 | Shek Bernard | Chief Legal Officer & Secty | $4.1M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026. | SEC |
| 2026-06-01 | 2026-06-02 | Ilkbahar Alper | EVP, Chief Technology Officer | $3.5M | S — Open-market sale3 Form 4 footnotesF1 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1754.8000 to a high of $1755.6800. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F2 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1757.0000 to a high of $1757.0850. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F3 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1758.0200 to a high of $1758.8850. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-05-12 | 2026-05-14 | Pokorny Michael | VP, Chief Accounting Officer | $3.5M | S — Open-market sale | SEC |
| 2026-02-25 | 2026-02-26 | Suzuki Miyuki | Director | $2.2M | S — Open-market sale2 Form 4 footnotesF1 Represents shares of common stock sold to satisfy tax obligations resulting from the vesting of equity awards in the tax year ended December 31, 2025 and capital gains incurred with respect to such sales in the tax year ending December 31, 2026. The Reporting Person is subject to a lock-up agreement, expiring March 19, 2026, which prohibits transfers, sales or other dispositions of shares of common stock during the applicable restricted period, subject to certain exceptions, including an exception for the sales reported on this Form 4. F2 Represents the weighted average sale price per share. The shares were sold in multiple transactions at prices ranging from $627.39 to $627.5351. The Reporting Person undertakes to provide the Issuer, any security holder, or the SEC staff, upon request, full information regarding the number of shares sold at each individual price. | SEC |
| 2026-09-15 | 2026-09-16 | Visoso Luis Felipe | EVP & CFO | $1.6M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 22, 2026. | SEC |
| 2026-07-01 | 2026-07-02 | Shek Bernard | Chief Legal Officer & Secty | $1.3M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026. | SEC |
| 2026-06-03 | 2026-06-05 | Shek Bernard | Chief Legal Officer & Secty | $1.0M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026. | SEC |
| 2026-10-01 | 2026-10-02 | Shek Bernard | Chief Legal Officer and Secty | $1.0M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026. | SEC |
| 2026-09-01 | 2026-09-02 | Shek Bernard | Chief Legal Officer & Secty | $915k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026. | SEC |
| 2026-05-08 | 2026-05-11 | Sayiner Necip | Director | $870k | S — Open-market sale | SEC |
| 2026-08-03 | 2026-08-04 | Shek Bernard | Chief Legal Officer & Secty | $697k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026. | SEC |
| 2026-09-03 | 2026-09-08 | Ilkbahar Alper | EVP & Chief Technology Officer | $626k | S — Open-market sale (scheduled 10b5-1)5 Form 4 footnotesF1 This Form 4 reports additional transactions effected on September 3, 2026 that were reported in part on a separate Form 4 filed on the same date, September 8, 2026. F2 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2026. F3 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1561.31 to a high of $1562.01. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F4 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1563.22 to a high of $1564.20. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F5 Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1571.03 to a high of $1571.25. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2025-12-03 | 2025-12-04 | Sayiner Necip | Director | $248k | S — Open-market sale | SEC |
| 2026-08-25 | 2026-08-27 | Goeckeler David | Chairman and CEO | $73.7M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF1 Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). | SEC |
| 2026-08-20 | 2026-08-24 | Visoso Luis Felipe | EVP & CFO | $41.1M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF1 Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). | SEC |
| 2026-09-03 | 2026-09-08 | Goeckeler David | Chairman & CEO | $16.4M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF1 Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). | SEC |
| 2026-09-03 | 2026-09-08 | Visoso Luis Felipe | EVP & CFO | $9.1M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF1 Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Aug 27, 2025 and Oct 2, 2026 there is not one open-market purchase of Sandisk Corporation: 16 sales worth $133.8M and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Sandisk Corporation's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| F | Tax withholding (shares surrendered for taxes) | 63 | $182.2M |
| A | Grant or award | 17 | $0 |
| S | Open-market sale | 16 | $133.8M |
| G | Gift | 4 | $0 |
| M | Option exercise | 1 | $0 |
| Total | Everything filed in the period | 101 | $315.9M |
22 of the 101 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 12 distinct people or entities have filed Sandisk Corporation transactions: none bought on the open market and 7 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
Of the 7 who sold on the open market (16 sales in all), the three biggest sellers account for $125.4M of the $133.8M: 94% of the money in three people.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Goeckeler David | Chairman & CEO | 19 | — | $105.0M (2) | 2026-09-21 |
| Ilkbahar Alper | EVP & Chief Technology Officer | 22 | — | $11.4M (3) | 2026-09-21 |
| Shek Bernard | Chief Legal Officer and Secty | 31 | — | $9.0M (6) | 2026-10-02 |
| Pokorny Michael | VP, Chief Accounting Officer | 6 | — | $3.5M (1) | 2026-09-21 |
| Suzuki Miyuki | Director | 3 | — | $2.2M (1) | 2026-02-26 |
| Visoso Luis Felipe | EVP & CFO | 9 | — | $1.6M (1) | 2026-09-21 |
| Sayiner Necip | Director | 3 | — | $1.1M (2) | 2026-05-11 |
| Caulfield Thomas | Director | 4 | — | — | 2026-05-14 |
Shown here are the 8 who moved the most money, out of 12. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Sep 2026: 0 purchases and 7 sales, worth $119.4M. 7 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 0 | $0 |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 1 | $248k |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 1 | $2.2M |
| Mar 2026 | 0 | $0 | 0 | $0 |
| Apr 2026 | 0 | $0 | 0 | $0 |
| May 2026 | 0 | $0 | 2 | $4.4M |
| Jun 2026 | 0 | $0 | 2 | $4.6M |
| Jul 2026 | 0 | $0 | 1 | $1.3M |
| Aug 2026 | 0 | $0 | 1 | $697k |
| Sep 2026 | 0 | $0 | 7 | $119.4M |
| Oct 2026 | 0 | $0 | 1 | $1.0M |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
Sandisk Corporation (SNDK) analysis page →
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How to read this data
11 of the 16 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. Sandisk has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Oct 2, 2026, and a Form 4 arrives up to two business days after the trade.
17 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.