Sandisk insider sells 2,308 shares under 10b5-1 plan

Sandisk’s chief legal officer reported a 10b5-1 plan sale and a tax-related share withholding in early September 2026.

Rhea-AI Filing Summary

Sandisk Corp (SNDK) reported that Chief Legal Officer & Secty Bernard Shek disposed of common stock in two transactions. On September 8, 2026, he sold 2,308 shares of common stock at $1,767.33 per share in an open-market or private transaction, pursuant to a Rule 10b5-1 trading plan adopted on March 4, 2026.

On September 3, 2026, 2,271 shares of common stock were disposed of at $1,554.99 per share to satisfy a tax obligation by withholding securities incident to the vesting of equity awards in accordance with Rule 16b-3(e). All reported holdings are direct, and no post-transaction share balance is stated.

Insider Trade Summary 10b5-1

Net Seller: 2,308 shares

Net Sell 2 txns

Insider Shek Bernard

Role Chief Legal Officer & Secty

Sold 2,308 shs ($4.08M)

Type	Security	Shares	Price	Value
Sale	Common Stock F2	2,308	$1,767.33	$4.08M
Tax Withholding	Common Stock F1	2,271	$1,554.99	$3.53M

Holdings After Transaction: Common Stock — 25,305 shares (Direct)

Footnotes (2)

1. F1. Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).
2. F2. 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.

Key Figures

Shares sold: 2,308 shares Sale price: $1,767.33 per share Shares withheld for taxes: 2,271 shares +3 more

6 metrics

Shares sold 2,308 shares Common stock sale on September 8, 2026 by Bernard Shek

Sale price $1,767.33 per share Common stock sale on September 8, 2026

Shares withheld for taxes 2,271 shares Tax-obligation withholding on September 3, 2026

Withholding reference price $1,554.99 per share Tax-related disposition on September 3, 2026

Rule 10b5-1 plan adoption date March 4, 2026 Plan governing the September 8, 2026 sale

Tax-liability disposition shares 2,271 shares Shares withheld under Rule 16b-3(e)

Key Terms

Rule 10b5-1 trading plan, Rule 16b-3(e), withholding securities

3 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Rule 16b-3(e) regulatory

"withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e)"

withholding securities financial

"Payment of tax obligation by withholding securities incident to the vesting"

FAQ

What insider transactions did Sandisk Corp (SNDK) disclose for Bernard Shek in this Form 4?

The filing reports two disposals of Sandisk Corp (SNDK) common stock: a sale of 2,308 shares on September 8, 2026, and a withholding of 2,271 shares on September 3, 2026 to satisfy a tax obligation tied to vesting equity.

At what prices were Bernard Shek’s Sandisk (SNDK) Form 4 transactions executed?

The September 8, 2026 sale of Sandisk (SNDK) common stock was reported at $1,767.33 per share. The September 3, 2026 tax-withholding disposition was reported at $1,554.99 per share.

Was the Sandisk (SNDK) insider sale by Bernard Shek under a Rule 10b5-1 plan?

Yes. The Form 4 states that the September 8, 2026 sale of 2,308 shares was effected pursuant to a Rule 10b5-1 trading plan adopted by Bernard Shek on March 4, 2026.

Why were 2,271 Sandisk (SNDK) shares disposed of on September 3, 2026?

The 2,271 shares disposed of on September 3, 2026 were withheld to pay a tax obligation incident to the vesting of securities, in accordance with Rule 16b-3(e), rather than being sold for investment purposes.

Does the Sandisk (SNDK) Form 4 show Bernard Shek’s remaining share holdings?

No. The Form 4 does not state a total number of Sandisk shares held by Bernard Shek after these transactions; the post-transaction share balance fields are not filled in.

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Available on EDGAR 09/08/2026 - 08:49 PM Accepted by SEC EDGAR 09/08/2026 - 08:48 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Shek Bernard

(Last) (First) (Middle)

C/O SANDISK CORPORATION

951 SANDISK DRIVE

(Street)

MILPITAS CALIFORNIA 95035

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Sandisk Corp [ SNDK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Legal Officer & Secty

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/03/2026		F		2,271(1)	D	$1,554.99	27,613	D
Common Stock	09/08/2026		S(2)		2,308	D	$1,767.33	25,305	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

2. 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.

	By: /s/ Sharon Spehar Attorney-in-Fact For: Bernard Shek	09/08/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)