Insider plans 2,000-share sale in Form 144

Accepted by SEC EDGAR 01/07/2026 - 04:13 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

An affiliate of ticker SNDK filed a Form 144 notice to sell 2,000 shares of common stock through Morgan Stanley Smith Barney, with an aggregate market value of 693,838.60, when 146,553,179 shares were outstanding and the sale is targeted for 01/07/2026 on NASDAQ. The shares to be sold were acquired as restricted stock vesting under a registered plan in 2013, 2015 and 2021 as compensation for services rendered. Over the past three months, the Massengill Living Trust has reported additional sales of the issuer’s common stock, including 2,340 shares for 508,394.95 on 11/26/2025 and 2,816 shares for 953,009.02 on 01/06/2026.

FAQ

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

What does the Form 144 filing for SNDK disclose?

The Form 144 notice discloses that an affiliate of the issuer plans to sell 2,000 shares of SNDK common stock, with an aggregate market value of 693,838.60, through Morgan Stanley Smith Barney.

How many SNDK shares are outstanding in this Form 144?

The filing states that there are 146,553,179 shares of the issuer’s common stock outstanding at the time of the planned sale.

When is the planned sale of SNDK shares expected to occur?

The Form 144 indicates an approximate sale date of 01/07/2026 for the 2,000 SNDK common shares on NASDAQ.

How were the SNDK shares in this Form 144 originally acquired?

The shares were acquired as restricted stock vesting under a registered plan from the issuer in 2013, 2015 and 2021 as compensation for services rendered.

What recent SNDK stock sales by the trust are reported in the Form 144?

The filing lists recent sales by the Massengill Living Trust, including 2,340 shares for 508,394.95 on 11/26/2025 and 2,816 shares for 953,009.02 on 01/06/2026.

Which broker is handling the planned SNDK share sale in this Form 144?

The planned sale of 2,000 SNDK common shares will be executed through Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza, New York.

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001232826
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	SANDISK CORPORATION
SEC File Number	001-42420
Address of Issuer	951 Sandisk Drive Milpitas CALIFORNIA 95035
Phone	(408) 801-1000
Name of Person for Whose Account the Securities are To Be Sold	MASSENGILL LIVING
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Former Affiliate

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	2000	693838.60	146553179	01/07/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	11/15/2021	Restricted stock vesting under a registered plan	Issuer			654	11/15/2021	Services Rendered
Common	11/11/2013	Restricted stock vesting under a registered plan	Issuer			986	11/11/2013	Services Rendered
Common	11/03/2015	Restricted stock vesting under a registered plan	Issuer			360	11/03/2015	Services Rendered

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
MASSENGILL LIVING TRUST 951 Sandisk Drive Milpitas CA 95035	Common	11/26/2025	2340	508394.95
MASSENGILL LIVING TRUST 951 Sandisk Drive Milpitas CA 95035	Common	11/25/2025	1500	335625.00
Massengill Trust 951 Sandisk Drive Milpitas CA 95035	Common	11/24/2025	1000	225089.00
MASSENGILL LIVING TRUST 951 Sandisk Drive Milpitas CA 95035	Common	01/06/2026	2816	953009.02

144: Remarks and Signature

Remarks
Date of Notice	01/07/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Matthew E Massengill
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)