Latest filingSep 02, 2026Most recent Form 4
SNDK
Sandisk Corp
NasdaqTechnologyComputer Storage Devices
Insider activity for last month from 08/03 to 09/03. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$91.5M1 sells
Net open-market-$91.5M4 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period15transactions
- F · Tax withholding · dominant12 · 80%
- M · Option exercise2 · 13%
- S · Open-market sells1 · 7%
Activity by reported role
A joint filing can contribute to multiple roles27transactions
- EVP · dominant8 · 30%
- CTO6 · 22%
- CLO4 · 15%
- SECTY4 · 15%
- CHAIR3 · 11%
- Chief financial officer2 · 7%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (4)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeIlkbahar AlperCommon Stock · Direct
48,846Aug 25, 2026
Shek BernardCommon Stock · Direct
29,884Sep 01, 2026
Goeckeler DavidCommon Stock · Direct
457,788Aug 25, 2026
Visoso Luis FelipeCommon Stock · Direct
137,814Aug 21, 2026
Ilkbahar AlperPerformance Shares · Direct
148,770Aug 20, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 03 → Sep 03
LessMore
Top insiders
By absolute net value across the selected period- VF-$43.6M
- GD-$3.7M
- SB-$1.3M
- IA-$1.2M
Recent filing activity
Most recent 12 transactions · color = transaction code- SSell09/02-$91.5MSEC
- MOption exercise08/24$0SEC
- FTax withholding08/24-$51.0MSEC
- FTax withholding08/24-$26.0MSEC
- FTax withholding08/24-$44.1MSEC
- MOption exercise08/24$0SEC
- FTax withholding08/24-$253MSEC
- FTax withholding08/24-$4.10BSEC
- FTax withholding08/24-$164MSEC
- FTax withholding08/24-$208MSEC
- FTax withholding08/24-$17.2MSEC
- FTax withholding08/24-$17.7MSEC
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
SNDK transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| SNDK | Shek Bernard | CLOSECTY | sale10b5-1 | 600 | -$91.5M | S | — | 0.0% | 09/02 | 09/01 |
| SNDK | Ilkbahar Alper | EVPCTO | exercise | 276 | $0 | M | +1.0% | 08/24 | 08/20 | |
| SNDK | Ilkbahar Alper | EVPCTO | withholding | 320 | -$51.0M | F | +1.0% | 08/24 | 08/21 | |
| SNDK | Ilkbahar Alper | EVPCTO | withholding | 163 | -$26.0M | F | +1.0% | 08/24 | 08/20 | |
| SNDK | Ilkbahar Alper | EVPCTO | withholding | 276 | -$44.1M | F | +1.0% | 08/24 | 08/20 | |
| SNDK | Ilkbahar Alper | EVPCTO | exercise | 276 | $0 | M | +1.0% | 08/24 | 08/20 | |
| SNDK | Visoso Luis Felipe | EVPCFO | withholding | 1.58k | -$253M | F | +1.0% | 08/24 | 08/21 | |
| SNDK | Visoso Luis Felipe | EVPCFO | withholding | 25.6k | -$4.10B | F | +1.0% | 08/24 | 08/20 | |
| SNDK | Goeckeler David | CHAIR | withholding | 1.03k | -$164M | F | +1.0% | 08/24 | 08/21 | |
| SNDK | Goeckeler David | CHAIR | withholding | 1.30k | -$208M | F | +1.0% | 08/24 | 08/20 | |
| SNDK | Shek Bernard | CLOSECTY | withholding | 108 | -$17.2M | F | +1.0% | 08/24 | 08/21 | |
| SNDK | Shek Bernard | CLOSECTY | withholding | 111 | -$17.7M | F | +1.0% | 08/24 | 08/20 |
Sandisk Corp Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Sandisk Corp?
Shek Bernard, Goeckeler David, Ilkbahar Alper, Visoso Luis Felipe.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Shek Bernard reported a sale on Sep 01, 2026 valued at $91.5M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $915,360.00. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.