Sandisk CTO sells 400 shares under 10b5-1 plan

Sandisk’s EVP and CTO reported Rule 10b5-1 plan sales of 400 shares and withholding of 3,244 shares for taxes on September 3, 2026.

Available on EDGAR 09/08/2026 - 08:50 PM EDT Accepted by SEC EDGAR 09/08/2026 - 08:50 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Sandisk Corp (SNDK) executive vice president and chief technology officer Alper Ilkbahar reported multiple transactions in the company’s common stock on September 3, 2026.

The filing shows open-market sales totaling 400 shares at prices around $1,561–$1,571 per share, made under a Rule 10b5-1 trading plan adopted June 4, 2026, plus a disposition of 3,244 shares withheld to pay tax obligations upon vesting of equity awards under Rule 16b-3(e). Post-transaction share holdings are not stated in this data.

Insider Trade Summary 10b5-1

Net Seller: 400 shares

Net Sell 5 txns

Insider Ilkbahar Alper

Role EVP & Chief Technology Officer

Sold 400 shs ($626K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2, F3	120	$1,561.69	$187K
Sale	Common Stock F2, F4	200	$1,563.684	$313K
Sale	Common Stock F2	40	$1,564.40	$63K
Sale	Common Stock F2, F5	40	$1,571.041	$63K
Tax Withholding	Common Stock F6	3,244	$1,554.99	$5.04M

Holdings After Transaction: Common Stock — 40,490 shares (Direct)

Footnotes (6)

1. F1. This Form 4 reports additional transactions effected on September 3, 2026 that were reported in part on a separate Form 4 filed on the same date, September 8, 2026.
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 June 4, 2026.
3. F3. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1561.31 to a high of $1562.01. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
4. F4. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1563.22 to a high of $1564.20. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
5. F5. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1571.03 to a high of $1571.25. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
6. F6. Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Key Figures

Shares sold total: 400 shares Shares sold at $1,561.69: 120 shares Shares sold at $1,563.684: 200 shares +4 more

7 metrics

Shares sold total 400 shares Open-market or private sales of Sandisk common stock on September 3, 2026

Shares sold at $1,561.69 120 shares Sale of common stock on September 3, 2026 at $1,561.69 per share

Shares sold at $1,563.684 200 shares Sale of common stock on September 3, 2026 at $1,563.684 per share (weighted average footnoted)

Shares sold at $1,564.40 40 shares Sale of common stock on September 3, 2026 at $1,564.40 per share

Shares sold at $1,571.041 40 shares Sale of common stock on September 3, 2026 at $1,571.041 per share (weighted average footnoted)

Shares withheld for tax 3,244 shares Shares withheld on September 3, 2026 to pay tax obligations upon vesting

Tax withholding price $1,554.99 per share Price used for 3,244-share tax-withholding disposition on September 3, 2026

Key Terms

Rule 10b5-1 trading plan, weighted average sale price per share, Rule 16b-3(e)

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.

weighted average sale price per share financial

"Represents the weighted average sale price per share. These shares were sold"

Rule 16b-3(e) regulatory

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

FAQ

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

What insider transactions did Sandisk Corp (SNDK) report for Alper Ilkbahar on September 3, 2026?

Alper Ilkbahar reported sales of 400 shares of Sandisk common stock and a separate disposition of 3,244 shares withheld to satisfy tax obligations related to vesting equity awards, all on September 3, 2026.

At what prices were the Sandisk (SNDK) insider sales executed?

The reported sales by Alper Ilkbahar covered 400 shares at per-share prices of $1,561.69, $1,563.684, $1,564.40, and $1,571.041, with several transactions noted as weighted average sale prices across narrow intraday ranges.

Were the Sandisk (SNDK) insider sales by Alper Ilkbahar under a Rule 10b5-1 plan?

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by Alper Ilkbahar on June 4, 2026, and the document-level Rule 10b5-1 checkbox is also affirmed.

Why were 3,244 Sandisk (SNDK) shares disposed of in Alper Ilkbahar’s Form 4?

The 3,244 shares were disposed of at $1,554.99 per share as a payment of tax obligation by withholding securities, incident to the vesting of securities in accordance with Rule 16b-3(e), rather than as an open-market sale.

How many Sandisk (SNDK) shares did Alper Ilkbahar sell in total in this Form 4?

The Form 4 reports 400 shares sold of Sandisk common stock across four sale transactions, in addition to 3,244 shares withheld to cover tax obligations on vesting equity; resulting share ownership after these transactions is not provided in this data.

What role does Alper Ilkbahar hold at Sandisk Corp (SNDK) in this Form 4?

Alper Ilkbahar is identified as executive vice president & chief technology officer of Sandisk Corp, making him a reporting officer subject to Section 16 reporting requirements for transactions in the company’s equity securities.

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

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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^*

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)
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(1)	09/03/2026		S(2)		120	D	$1,561.69(3)	44,014	D
Common Stock	09/03/2026		S(2)		200	D	$1,563.684(4)	43,814	D
Common Stock	09/03/2026		S(2)		40	D	$1,564.4	43,774	D
Common Stock	09/03/2026		S(2)		40	D	$1,571.041(5)	43,734	D
Common Stock	09/03/2026		F		3,244(6)	D	$1,554.99	40,490	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. This Form 4 reports additional transactions effected on September 3, 2026 that were reported in part on a separate Form 4 filed on the same date, September 8, 2026.

2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2026.

3. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1561.31 to a high of $1562.01. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

4. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1563.22 to a high of $1564.20. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

5. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1571.03 to a high of $1571.25. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

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

	By: /s/ Sharon Spehar Attorney-in-Fact For: Alper Ilkbahar	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)