Was Bernard Shek’s Sandisk (SNDK) share sale made under a Rule 10b5-1 plan?

Yes. A footnote states the reported sales were effected under a Rule 10b5-1 trading plan adopted on March 4, 2026. Such plans pre-schedule trades, meaning the timing of this June 3, 2026 sale was set in advance by the reporting person.

Sandisk (SNDK) legal chief sells 600 shares under pre-set Rule 10b5-1 plan

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Sandisk Corp’s Chief Legal Officer and Secretary, Bernard Shek, sold shares in a planned transaction. On June 3, 2026, he completed an open-market sale of 600 shares of common stock at $1,736 per share. After this sale, he directly held 32,232 common shares. According to a footnote, the sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on March 4, 2026, indicating the timing was set in advance rather than chosen opportunistically.

Insider Trade Summary 10b5-1

Net Seller: 600 shares ($1,041,600)

Net Sell 1 txn

Insider Shek Bernard

Role Chief Legal Officer & Secty

Sold 600 shs ($1.04M)

Type	Security	Shares	Price	Value
Sale	Common Stock	600	$1,736.00	$1.04M

Holdings After Transaction: Common Stock — 32,232 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 600 shares Sale price per share: $1,736 per share Shares held after sale: 32,232 shares +1 more

4 metrics

Shares sold 600 shares Open-market sale on June 3, 2026

Sale price per share $1,736 per share Common stock transaction on June 3, 2026

Shares held after sale 32,232 shares Direct ownership following reported transaction

Net shares sold 600 shares Net buy/sell direction in transaction summary

Key Terms

Form 4, Rule 10b5-1 trading plan, open-market sale, Common Stock

4 terms

Form 4 regulatory

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

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Rule 10b5-1 trading plan regulatory

"were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

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.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

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.

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Form 4 Insider Transactions: What Each Field Means →

06/05/2026 - 05:25 PM

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^*

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)
06/03/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/03/2026		S⁽¹⁾		600	D	$1,736	32,232	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. 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/ Van Huynh Attorney-in-Fact For: Bernard Shek	06/05/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Sandisk Corp (SNDK) report for Bernard Shek?

Sandisk reported that Chief Legal Officer Bernard Shek sold 600 shares of common stock in an open-market transaction. The sale occurred on June 3, 2026, and was executed at a price of $1,736 per share under a pre-arranged trading plan.

How many Sandisk (SNDK) shares did Bernard Shek sell and at what price?

Bernard Shek sold 600 shares of Sandisk common stock at $1,736 per share. This was an open-market sale disclosed in a Form 4 filing, giving investors precise information on the trade size and execution price for this insider transaction.

How many Sandisk (SNDK) shares does Bernard Shek hold after this Form 4 sale?

After the sale, Bernard Shek directly holds 32,232 shares of Sandisk common stock. This post-transaction balance, reported in the Form 4, shows that the 600-share sale represents only a small fraction of his remaining direct ownership position.

What type of insider transaction was disclosed for Sandisk (SNDK) on this Form 4?

The Form 4 reports an open-market sale of common stock by Bernard Shek, coded as transaction type “S.” This indicates a sale in the market or a private transaction rather than an option exercise, gift, tax withholding event, or other non-market transaction.