SNDK SEC Filing News — Sandisk Corporation

Latest SEC filings for Sandisk Corporation (SNDK) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-02.

Sandisk Corporation develops, manufactures, and sells data storage devices and solutions using NAND flash technology in the Americas, Europe, the Middle East, Africa, Asia, and internationally. The company provides solid state drives for desktop and notebook PCs, gaming consoles, and set top boxes; and flash-based embedded storage products for mobile phones, tablets, notebook PCs and other portable and wearable devices, automotive applications, Internet of Things, industrial, and connected home …
Sector: Technology Industry: Computer Hardware Market Cap: $187.8B CIK: 2023554
20
Total Filings
0
Bullish Classifications
10
Bearish Classifications
14
Insider Transactions
2
Material Events (8-K)
0
Periodic Reports
Rule-based classifications for SNDK currently lean bearish. Of the 20 filing records displayed, 10 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.
SNDK Filing Activity Snapshot 2026-09-08 — 2026-10-02
Insider Transactions (Form 4)
0 buys vs 7 sells
Net insider selling in this period — insiders sell for many reasons beyond conviction.
Largest Form 144 Filing
$55.27M
DAVID GOECKELER · 2026-09-14
33,838 shares · Form 144
Form 144 Notices
4
Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.
Insider Transactions 14 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 14 filings in this group are Form 4s for Sandisk Corporation.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 14 insider filings shown, the breakdown is 7 open-market sale, 4 compensation award and 3 tax withholding. 7 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market sale ×7
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Compensation award ×4
Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Tax withholding ×3
Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.
Form 4 Open-market sale Insider Selling 2026-10-02

SNDK insider Shek Bernard (Chief Legal Officer and Secty) sold 600 shares (~$1.04M)

Shek Bernard, listed as Chief Legal Officer and Secty at Sandisk Corp, reported an open-market sale of 600 SNDK shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 600 $1,734.94 $1.04M
Filing: Form 4 (Insider Transaction) Insider: Shek Bernard (Chief Legal Officer and Secty) Shares: 600 Est. Value: $1.04M
View on SEC EDGAR → Open Filing Document →
Form 4 Compensation award Tax / Compensation Filing 2026-09-21

SNDK insider Form 4 filed for equity award, exercise, or tax withholding

Pokorny Michael (VP, Chief Accounting Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 458 — —
Filing: Form 4 (Insider Transaction) Insider: Pokorny Michael (VP, Chief Accounting Officer) Shares: 458
View on SEC EDGAR → Open Filing Document →
Form 4 Compensation award Tax / Compensation Filing 2026-09-21

SNDK insider Form 4 filed for equity award, exercise, or tax withholding

Visoso Luis Felipe (EVP & CFO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 1,635 — —
Filing: Form 4 (Insider Transaction) Insider: Visoso Luis Felipe (EVP & CFO) Shares: 1,635
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-21

SNDK insider Goeckeler David (Director, Chairman & CEO) sold 33,841 shares (~$53.27M)

Goeckeler David, listed as Director, Chairman & CEO at Sandisk Corp, reported an open-market sale of 33,841 SNDK shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 3,296 — —
S Open-market sale 40 $1,567.26 $62.7K
S Open-market sale 9,604 $1,569.00 $15.07M
S Open-market sale 910 $1,570.04 $1.43M
S Open-market sale 4,558 $1,571.21 $7.16M
S Open-market sale 1,157 $1,572.60 $1.82M
S Open-market sale 306 $1,573.15 $481.4K
S Open-market sale 2,588 $1,574.57 $4.07M
S Open-market sale 2,778 $1,575.58 $4.38M
S Open-market sale 4,139 $1,576.82 $6.53M
S Open-market sale 2,876 $1,578.34 $4.54M
S Open-market sale 640 $1,579.40 $1.01M
S Open-market sale 1,480 $1,580.25 $2.34M
S Open-market sale 1,080 $1,583.80 $1.71M
S Open-market sale 1,520 $1,585.85 $2.41M
S Open-market sale 165 $1,587.00 $261.9K
Filing: Form 4 (Insider Transaction) Insider: Goeckeler David (Director, Chairman & CEO) Shares: 33,841 Est. Value: $53.27M
View on SEC EDGAR → Open Filing Document →
Form 4 Compensation award Tax / Compensation Filing 2026-09-21

SNDK insider Form 4 filed for equity award, exercise, or tax withholding

Shek Bernard (Chief Legal Officer and Secty) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 1,001 — —
F Tax withholding on vested shares 118 $1,791.82 $211.4K
Filing: Form 4 (Insider Transaction) Insider: Shek Bernard (Chief Legal Officer and Secty) Shares: 1,119
View on SEC EDGAR → Open Filing Document →
Form 4 Compensation award Tax / Compensation Filing 2026-09-21

SNDK insider Form 4 filed for equity award, exercise, or tax withholding

Ilkbahar Alper (EVP & Chief Technology Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 1,619 — —
Filing: Form 4 (Insider Transaction) Insider: Ilkbahar Alper (EVP & Chief Technology Officer) Shares: 1,619
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-16

SNDK insider Visoso Luis Felipe (EVP & CFO) sold 1,000 shares (~$1.57M)

Visoso Luis Felipe, listed as EVP & CFO at Sandisk Corp, reported an open-market sale of 1,000 SNDK shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 1,000 $1,568.83 $1.57M
Filing: Form 4 (Insider Transaction) Insider: Visoso Luis Felipe (EVP & CFO) Shares: 1,000 Est. Value: $1.57M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-16

SNDK insider Goeckeler David (Director, Chairman & CEO) sold 33,838 shares (~$51.70M)

Goeckeler David, listed as Director, Chairman & CEO at Sandisk Corp, reported an open-market sale of 33,838 SNDK shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 14,364 $1,522.59 $21.87M
S Open-market sale 181 $1,522.87 $275.6K
S Open-market sale 3,075 $1,524.27 $4.69M
S Open-market sale 2,280 $1,526.45 $3.48M
S Open-market sale 4,080 $1,528.45 $6.24M
S Open-market sale 359 $1,529.36 $549.0K
S Open-market sale 1,200 $1,532.17 $1.84M
S Open-market sale 700 $1,535.12 $1.07M
S Open-market sale 1,695 $1,535.96 $2.60M
S Open-market sale 3,200 $1,537.68 $4.92M
S Open-market sale 1,480 $1,539.19 $2.28M
S Open-market sale 864 $1,540.78 $1.33M
S Open-market sale 360 $1,541.88 $555.1K
Filing: Form 4 (Insider Transaction) Insider: Goeckeler David (Director, Chairman & CEO) Shares: 33,838 Est. Value: $51.70M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-08

SNDK insider Ilkbahar Alper (EVP & Chief Technology Officer) sold 400 shares (~$625.6K)

Ilkbahar Alper, listed as EVP & Chief Technology Officer at Sandisk Corp, reported an open-market sale of 400 SNDK shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 120 $1,561.69 $187.4K
S Open-market sale 200 $1,563.68 $312.7K
S Open-market sale 40 $1,564.40 $62.6K
S Open-market sale 40 $1,571.04 $62.8K
F Tax withholding on vested shares 3,244 $1,554.99 $5.04M
Filing: Form 4 (Insider Transaction) Insider: Ilkbahar Alper (EVP & Chief Technology Officer) Shares: 400 Est. Value: $625.6K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-08

SNDK insider Ilkbahar Alper (EVP & Chief Technology Officer) sold 4,712 shares (~$7.26M)

Ilkbahar Alper, listed as EVP & Chief Technology Officer at Sandisk Corp, reported an open-market sale of 4,712 SNDK shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 40 $1,513.23 $60.5K
S Open-market sale 80 $1,515.05 $121.2K
S Open-market sale 52 $1,517.68 $78.9K
S Open-market sale 68 $1,519.23 $103.3K
S Open-market sale 80 $1,520.93 $121.7K
S Open-market sale 40 $1,522.10 $60.9K
S Open-market sale 80 $1,523.61 $121.9K
S Open-market sale 80 $1,526.81 $122.1K
S Open-market sale 40 $1,527.58 $61.1K
S Open-market sale 80 $1,529.70 $122.4K
S Open-market sale 80 $1,530.52 $122.4K
S Open-market sale 40 $1,532.02 $61.3K
S Open-market sale 120 $1,533.69 $184.0K
S Open-market sale 80 $1,534.48 $122.8K
S Open-market sale 80 $1,535.65 $122.9K
S Open-market sale 160 $1,537.49 $246.0K
S Open-market sale 80 $1,538.41 $123.1K
S Open-market sale 80 $1,539.61 $123.2K
S Open-market sale 80 $1,541.01 $123.3K
S Open-market sale 80 $1,542.67 $123.4K
S Open-market sale 2,594 $1,543.76 $4.00M
S Open-market sale 80 $1,546.02 $123.7K
S Open-market sale 80 $1,547.46 $123.8K
S Open-market sale 40 $1,548.85 $62.0K
S Open-market sale 40 $1,550.48 $62.0K
S Open-market sale 120 $1,553.35 $186.4K
S Open-market sale 40 $1,554.02 $62.2K
S Open-market sale 78 $1,555.57 $121.3K
S Open-market sale 80 $1,557.79 $124.6K
S Open-market sale 40 $1,558.90 $62.4K
Filing: Form 4 (Insider Transaction) Insider: Ilkbahar Alper (EVP & Chief Technology Officer) Shares: 4,712 Est. Value: $7.26M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-08

SNDK insider Shek Bernard (Chief Legal Officer & Secty) sold 2,308 shares (~$4.08M)

Shek Bernard, listed as Chief Legal Officer & Secty at Sandisk Corp, reported an open-market sale of 2,308 SNDK shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 2,271 $1,554.99 $3.53M
S Open-market sale 2,308 $1,767.33 $4.08M
Filing: Form 4 (Insider Transaction) Insider: Shek Bernard (Chief Legal Officer & Secty) Shares: 2,308 Est. Value: $4.08M
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-09-08

SNDK insider Form 4 filed for equity award, exercise, or tax withholding

Goeckeler David (Director, Chairman & CEO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 10,540 $1,554.99 $16.39M
Filing: Form 4 (Insider Transaction) Insider: Goeckeler David (Director, Chairman & CEO) Shares: 10,540
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-09-08

SNDK insider Form 4 filed for equity award, exercise, or tax withholding

Visoso Luis Felipe (EVP & CFO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 5,838 $1,554.99 $9.08M
Filing: Form 4 (Insider Transaction) Insider: Visoso Luis Felipe (EVP & CFO) Shares: 5,838
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-09-08

SNDK insider Form 4 filed for equity award, exercise, or tax withholding

Pokorny Michael (VP, Chief Accounting Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 1,283 $1,554.99 $2.00M
Filing: Form 4 (Insider Transaction) Insider: Pokorny Michael (VP, Chief Accounting Officer) Shares: 1,283
View on SEC EDGAR → Open Filing Document →
Proposed Insider Sales 4 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Sandisk Corporation has 4 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Large Proposed Insider Sale 2026-09-17

SNDK Form 144 filed for proposed insider sale by DAVID GOECKELER (33,841 shares) ~$51.44M

DAVID GOECKELER filed a Form 144 with the SEC indicating intent to sell SNDK (Sandisk Corp) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: DAVID GOECKELER Shares: 33,841 Est. Value: $51.44M
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-09-15

SNDK Form 144 filed for proposed insider sale by LUIS VISOSO (3,000 shares) ~$4.66M

LUIS VISOSO filed a Form 144 with the SEC indicating intent to sell SNDK (Sandisk Corp) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: LUIS VISOSO Shares: 3,000 Est. Value: $4.66M
View on SEC EDGAR → Open Filing Document →
Form 144 Large Proposed Insider Sale 2026-09-14

SNDK Form 144 filed for proposed insider sale by DAVID GOECKELER (33,838 shares) ~$55.27M

DAVID GOECKELER filed a Form 144 with the SEC indicating intent to sell SNDK (Sandisk Corp) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: DAVID GOECKELER Shares: 33,838 Est. Value: $55.27M
View on SEC EDGAR → Open Filing Document →
Form 144 Large Proposed Insider Sale 2026-09-08

SNDK Form 144 filed for proposed insider sale by BERNARD SHEK (4,108 shares) ~$7.15M

BERNARD SHEK filed a Form 144 with the SEC indicating intent to sell SNDK (Sandisk Corp) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: BERNARD SHEK Shares: 4,108 Est. Value: $7.15M
View on SEC EDGAR → Open Filing Document →
Material Events 2 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 2 in this period for Sandisk Corporation. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-09-16

SNDK filed 8-K — material company event

Sandisk Corp filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →
Form 8-K Material Company Update 2026-09-11

SNDK filed 8-K — material company event

Sandisk Corp filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →

How we classify Sandisk Corporation's filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on SNDK. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — SNDK SEC Filings

More Tools for SNDK

SNDK Full Stock Analysis SNDK Live Chart Institutional Ownership Earnings Calendar Options Flow Scanner Semiconductor Demand Zone Tracker Sector Scanner Browse All Stocks

Want deeper SNDK analysis?

View valuation, growth metrics, the rule-based stock-page score, demand zones, peer comparison, and more — all on the SNDK stock analysis page.

SNDK Full Analysis
Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.
Data Sources · Methodology · AI Disclosure · Corrections Policy · Disclaimer