Sandisk CTO uses shares to cover tax withholding

Sandisk Corp executive Alper Ilkbahar reported routine share dispositions tied to tax withholding on recently vested equity awards.

Rhea-AI Filing Summary

Sandisk Corp executive Alper Ilkbahar reported routine share dispositions tied to tax withholding on recently vested equity awards. On May 21, 2026, 319 shares of Common Stock were withheld at $1,542.24 per share to satisfy tax obligations.

On May 20, 2026, an additional 162 shares were withheld at $1,392.56 per share for the same purpose. These transactions were made by delivering securities to pay taxes incident to vesting under Rule 16b-3(e). Following the transactions, Ilkbahar directly holds 55,330 shares of Sandisk Common Stock.

Insider Trade Summary

Exercise Price or Tax Liability: 481 shares

Exercise Price or Tax Liability 2 txns

Insider Ilkbahar Alper

Role EVP, Chief Technology Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	319	$1,542.24	$492K
Exercise Price or Tax Liability	Common Stock	162	$1,392.56	$226K

Holdings After Transaction: Common Stock — 55,330 shares (Direct)

Footnotes (1)

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

Key Figures

Shares withheld for taxes: 481 shares Withheld on May 21, 2026: 319 shares at $1,542.24 Withheld on May 20, 2026: 162 shares at $1,392.56 +1 more

4 metrics

Shares withheld for taxes 481 shares Total tax-withholding shares reported in Form 4

Withheld on May 21, 2026 319 shares at $1,542.24 Common Stock withheld to cover tax obligation

Withheld on May 20, 2026 162 shares at $1,392.56 Common Stock withheld to cover tax obligation

Shares held after transactions 55,330 shares Direct Common Stock holdings after May 21, 2026

Key Terms

Rule 16b-3(e), tax obligation, vesting of securities, Common Stock

4 terms

Rule 16b-3(e) regulatory

"in accordance with Rule 16b-3(e)"

tax obligation financial

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

vesting of securities financial

"withholding securities incident to the vesting of securities"

Common Stock financial

"Common Stock were withheld at $1,542.24 per share"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What insider transactions did Sandisk (SNDK) CTO Alper Ilkbahar report?

Alper Ilkbahar reported two dispositions of Sandisk Common Stock used to cover tax obligations on vested equity. A total of 481 shares were withheld across the two dates, with no open-market purchases or sales reported in this Form 4.

Were Alper Ilkbahar’s Sandisk (SNDK) transactions open-market sales?

No, the transactions were not open-market sales. The Form 4 states they were payments of tax obligations by withholding securities incident to the vesting of awards, executed in accordance with Rule 16b-3(e).

How many Sandisk (SNDK) shares were withheld for Alper Ilkbahar’s taxes?

A total of 481 Sandisk Common Stock shares were withheld. This includes 319 shares on May 21, 2026 at $1,542.24 per share and 162 shares on May 20, 2026 at $1,392.56 per share.

How many Sandisk (SNDK) shares does Alper Ilkbahar hold after these transactions?

After the reported tax-withholding dispositions, Alper Ilkbahar directly holds 55,330 shares of Sandisk Common Stock. This post-transaction balance is reported in the Form 4 as total shares following the most recent transaction.

What is the significance of Rule 16b-3(e) in Alper Ilkbahar’s Sandisk filing?

Rule 16b-3(e) allows insiders to satisfy tax or exercise obligations using company securities without treating them as traditional market trades. The footnote explains the withheld shares paid tax obligations incident to vesting under this rule.

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

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Accepted by SEC EDGAR 05/22/2026 - 06:47 PM EDT 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).

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^*

Ilkbahar Alper

(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)
	EVP, Chief Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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	05/20/2026		F		162(1)	D	$1,392.56	55,649	D
Common Stock	05/21/2026		F		319(1)	D	$1,542.24	55,330	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).

	By: /s/ Van Huynh Attorney-in-Fact For: Alper Ilkbahar	05/22/2026
	** 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)