Sandisk's David Goeckeler plans $51M stock sale

Sandisk Corp officer David Goeckeler filed a Rule 144 notice covering 33,841 shares tied to recently vested equity awards and prior 10b5-1 sales.

Rhea-AI Filing Summary

Sandisk Corp (SNDK) received a notice that officer David Goeckeler intends to sell common stock under Rule 144. The notice lists 33,841 shares of common stock to be sold through Morgan Stanley Smith Barney LLC, with an aggregate market value of $51,437,304.77 and 146,419,001 shares outstanding as of September 17, 2026 on NASDAQ.

The shares relate to equity awards, including 9,328 Restricted Stock Units that vested on May 20, 2026 and 24,513 Performance Stock Units that vested on August 25, 2026, all issued by Sandisk Corp. The filing also reports prior 10b5-1 sales over the past three months, including a sale of 33,838 shares of common stock on September 14, 2026.

Key Figures

Shares to be sold under Rule 144: 33,841 shares Aggregate market value of shares listed for sale: $51,437,304.77 Shares outstanding: 146,419,001 shares +4 more

7 metrics

Shares to be sold under Rule 144 33,841 shares Common stock listed with Morgan Stanley Smith Barney LLC and NASDAQ as of September 17, 2026

Aggregate market value of shares listed for sale $51,437,304.77 Value associated with 33,841 shares of Sandisk Corp common stock

Shares outstanding 146,419,001 shares Sandisk Corp common stock outstanding as of September 17, 2026

Restricted Stock Units vested 9,328 units RSUs vested on May 20, 2026 and issued by Sandisk Corp

Performance Stock Units vested 24,513 units PSUs vested on August 25, 2026 and issued by Sandisk Corp

Recent 10b5-1 sale 33,838 shares Common stock sold on September 14, 2026 under a 10b5-1 plan, value $51,700,129.35

Period of RSU vesting May 20, 2026 through September 3, 2026 Period over which RSUs vesting generated the securities to be sold

Key Terms

Rule 144, Restricted Stock Units, Performance Stock Units, 10b5-1

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"Common | 05/20/2026 | Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Performance Stock Units financial

"Common | 08/25/2026 | Performance Stock Units | Issuer"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

10b5-1 regulatory

"10b5-1 Sales for DAVID GOECKELER 951 Sandisk Drive"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Sandisk Corp (SNDK) disclose in David Goeckeler’s Form 144 filing?

The filing states that officer David Goeckeler plans to sell 33,841 shares of Sandisk Corp common stock under Rule 144 through Morgan Stanley Smith Barney LLC, based on shares acquired from vesting equity awards.

How many Sandisk Corp (SNDK) shares are covered by the planned Rule 144 sale?

The notice lists 33,841 shares of Sandisk Corp common stock, with an aggregate market value of $51,437,304.77 and 146,419,001 shares of common stock outstanding as of September 17, 2026.

What type of equity awards underlie the Sandisk (SNDK) shares in this Form 144?

The securities to be sold were acquired from the vesting of Restricted Stock Units and Performance Stock Units, including 9,328 RSUs vested on May 20, 2026 and 24,513 PSUs vested on August 25, 2026, all issued by Sandisk Corp.

What recent Sandisk (SNDK) stock sales does the Form 144 report for the past three months?

The past three months section reports 10b5-1 sales for David Goeckeler, including a sale of 33,838 shares of Sandisk Corp common stock on September 14, 2026, with a listed value of $51,700,129.35.

What period does the Sandisk (SNDK) Form 144 say the RSUs were acquired over?

The remarks state the securities to be sold were acquired upon the vesting of restricted stock units during the period of May 20, 2026 through September 3, 2026, reflecting ongoing equity vesting for David Goeckeler.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/17/2026 - 04:31 PM Accepted by SEC EDGAR 09/17/2026 - 04:30 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001713941
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Sandisk Corporation
SEC File Number	001-42420
Address of Issuer	951 Sandisk Drive Milpitas CALIFORNIA 95035
Phone	4088011000
Name of Person for Whose Account the Securities are To Be Sold	DAVID GOECKELER
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	33841	51437304.77	146419001	09/17/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/20/2026	Restricted Stock Units	Issuer			9328	05/20/2026	N/A
Common	08/25/2026	Performance Stock Units	Issuer			24513	08/25/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for DAVID GOECKELER 951 Sandisk Drive Milpitas CA 95035	Common	09/14/2026	33838	51700129.35

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 05/20/2026 through 09/03/2026
Date of Notice	09/17/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/29/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ David Goeckeler
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)