Form 8-K

8-K — Sandisk Corp

Accession: 0001193125-26-224694

Filed: 2026-05-15

Period: 2026-05-14

CIK: 0002023554

SIC: 3572 (COMPUTER STORAGE DEVICES)

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — d157363d8k.htm (Primary)

EX-99.1 (d157363dex991.htm)

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8-K

8-K (Primary)

Filename: d157363d8k.htm · Sequence: 1

8-K

Sandisk Corp false 0002023554 0002023554 2026-05-14 2026-05-14

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 14, 2026

Sandisk Corporation

(Exact Name of Registrant as Specified in its Charter)

Delaware

001-42420

99-1508671

(State or Other Jurisdiction

of Incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

951 Sandisk Drive

Milpitas

California

95035

(Address of Principal Executive Offices)

(Zip Code)

(408) 801-1000

(Registrant’s Telephone Number, Including Area Code)

Not applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange

on which registered

Common Stock, $0.01 Par Value Per Share

SNDK

The Nasdaq Stock Market LLC

(Nasdaq Global Select Market)

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01

Other Events.

Sandisk Corporation (the “Company”) recently became aware of an unsolicited “mini-tender” offer by Tutanota LLC (“Tutanota”) to purchase up to 100,000 shares of the Company’s common stock at an offer price of $1,150.00 per share. The shares subject to Tutanota’s offer represent less than 0.07% of the Company’s common stock as of April 24, 2026.

On May 14, 2026, the Company issued the press release attached to this current report on Form 8-K as Exhibit 99.1 informing its stockholders that the Company does not endorse Tutanota’s unsolicited mini-tender offer and recommending that stockholders do not tender their shares to Tutanota. Stockholders who have already tendered their shares may withdraw them at any time prior to the expiration of the offer in accordance with Tutanota’s offering documents. The offer is currently scheduled to expire at 5:00 p.m. Eastern Time, on Wednesday, May 20, 2026, unless the offer is otherwise extended by Tutanota in its discretion or terminated earlier.

The Company is not affiliated or associated in any way with Tutanota, its mini-tender offer, or the offer documentation. Additional information concerning mini-tenders is included in the attached press release.

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits

99.1

Press release issued by Sandisk Corporation on May 14, 2026.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Sandisk Corporation

(Registrant)

By:

/s/ Bernard Shek

Bernard Shek

Chief Legal Officer

and Secretary

Date: May 14, 2026

EX-99.1

Filename: d157363dex991.htm · Sequence: 2

EX-99.1

Exhibit 99.1

Sandisk Recommends Stockholders Reject “Mini-Tender” Offer by Tutanota LLC

MILPITAS, Calif. - May 14, 2026 - Sandisk Corporation (Nasdaq: SNDK) (“Sandisk”) today announced that it recently became aware of an unsolicited

“mini-tender” offer by Tutanota LLC (“Tutanota”) to purchase up to 100,000 shares of Sandisk’s common stock at an offer price of $1,150.00 per share. The shares subject to Tutanota’s offer represent less than

0.07% of Sandisk’s common stock as of April 24, 2026.

The offer price of $1,150.00 per share is conditioned upon, among other things, the

closing price per share of Sandisk’s common stock exceeding $1,150.00 per share on the last trading day before the offer expires. This means that unless this condition is waived by Tutanota, Sandisk stockholders who tender their shares in the

offer will receive a below-market price. Tutanota can extend the offer for successive periods of 45 to 180 days, in which case payment would be delayed beyond the scheduled expiration. Stockholders who have already tendered their shares may withdraw

them at any time by providing notice in the manner described in the Tutanota offering documents prior to the expiration of the offer, which is currently scheduled for 5:00 p.m., Eastern Time, on Wednesday, May 20, 2026, unless extended. Sandisk

recommends that stockholders who have not responded to Tutanota’s offer take no action.

Sandisk does not endorse Tutanota’s unsolicited

mini-tender offer and is not affiliated or associated in any way with Tutanota, its mini-tender offer, or the offer documentation.

Tutanota has made

similar unsolicited mini-tender offers for stock of other public companies. As Tutanota’s mini-tender offer is for less than five (5) percent of Sandisk’s outstanding shares, it is not subject to many of the disclosure and procedural

requirements of Securities and Exchange Commission (“SEC”) rules that are designed to protect investors. The SEC has cautioned investors about mini-tender offers, noting that “some bidders make mini-tender offers at below-market

prices, hoping that they will catch investors off guard if the investors do not compare the offer price to the current market price.” The SEC’s guidance to investors on mini-tenders is available at

https://www.sec.gov/investor/pubs/minitend.htm.

Sandisk encourages brokers and dealers, as well as other market participants, to review the

SEC’s letter regarding broker-dealer mini-tender offer dissemination and disclosures at https://www.sec.gov/divisions/marketreg/minitenders/sia072401.htm and the NASD Notice to Members 99-53

issued in July 1999 regarding guidance to members forwarding mini-tender offers to their customers, which can be found at https://www.sec.gov/divisions/marketreg/minitenders/sia072401.htm.

Stockholders should obtain current market quotations for their shares, consult with their broker or financial advisor, and exercise caution with respect to

Tutanota’s mini-tender offer.

Sandisk requests that a copy of this news release be included with all distributions of materials relating to

Tutanota’s mini-tender offer related to Sandisk’s common stock.

About Sandisk

Sandisk (Nasdaq: SNDK) delivers innovative Flash solutions and advanced memory technologies that meet people and businesses at the intersection of their

aspirations and the moment, enabling them to keep moving and pushing possibility forward. Follow Sandisk on Instagram, Facebook, X, LinkedIn, and YouTube. Join TeamSandisk on Instagram.

registered trademarks or trademarks of Sandisk Corporation or its affiliates in the US and/or other countries. All other marks are property of their respective owners.

Company Contacts:

Sandisk Corporation

Investor Contact:

Media Contact:

Ivan Donaldson

Media Relations

E: ivan.donaldson@sandisk.com

mediainquiries@sandisk.com

investors@sandisk.com

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