Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Ilkbahar Alper 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) EVP, Chief Technology Officer (Last) (First) (Middle) C/O SANDISK CORPORATION, 951 SANDISK DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 08/20/2026 (Street) MILPITAS, CA 95035 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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 08/20/2026 M 276(1) A $ 0 50,259 D Common Stock 08/20/2026 F 276(2) D $1,600.62 49,983 D Common Stock 08/20/2026 F 163(3) D $1,600.62 49,820 D Common Stock 08/21/2026 F 320(3) D $1,596.08 49,500 D

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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 Underlying Securities (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 of Derivative Security: 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

Performance Shares

(1)

08/20/2026

M

276

(1)

(1)

Common Stock

276

$ 0

148,770

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Ilkbahar Alper C/O SANDISK CORPORATION 951 SANDISK DRIVE MILPITAS, CA 95035			EVP, Chief Technology Officer

Signatures

By: /s/ Van Huynh Attorney-in-Fact For: Alper Ilkbahar		08/24/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	The reported transaction reflects the conversion of performance stock units to shares solely for the purpose of satisfying FICA tax withholding obligations as a result of the Reporting Person's retirement eligibility. The number of shares represents what was necessary to satisfy the FICA tax liability and related taxes attributable to the conversion itself, of which the shares were simultaneously forfeited to pay for the taxes.
(2)	Represents shares withheld to satisfy the reporting person's tax withholding obligation in connection with the transaction described in Footnote (1) and is exempt pursuant to Rule 16b-3(e).
(3)	Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

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