Form 8-K

8-K — WOLFSPEED, INC.

Accession: 0000895419-26-000042

Filed: 2026-07-29

Period: 2026-07-28

CIK: 0000895419

SIC: 3674 (SEMICONDUCTORS & RELATED DEVICES)

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — wolfspeed-20260728.htm (Primary)

EX-99.1 (exhibit99_1072926.htm)

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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): July 28, 2026

WOLFSPEED, INC.

(Exact name of registrant as specified in its charter)

Delaware 001-40863 56-1572719

(State or other jurisdiction of

incorporation) (Commission File

Number) (I.R.S. Employer

Identification Number)

4600 Silicon Drive

Durham North Carolina 27703

(Address of principal executive offices) (Zip Code)

(919) 407-5300

Registrant’s telephone number, including area code

N/A

(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:

☐ 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 Name of each exchange on which registered

Common Stock, $0.00125 par value WOLF New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Election of Andreas W. Mattes as Director

On July 28, 2026, the Board of Directors (the “Board”) of Wolfspeed, Inc. (the “Company”) appointed Andreas (“Andy”) W. Mattes as a member of the Board and as a member and the chair of the Compensation Committee of the Board, with such appointments effective immediately.

Mr. Mattes, age 65, served as the President and Chief Executive Officer of Coherent, Inc. (Nasdaq: COHR), a leading provider of laser and laser-based technologies for scientific, commercial, and industrial applications, from April 2020 to July 2022. Prior to Coherent, from July 2019 to April 2020, Mr. Mattes served as a Senior Advisor at McKinsey & Company, where he focused on advising international businesses on high-impact transformations, agile change, and positioning companies for growth. He has held senior leadership roles at Diebold Nixdorf, Hewlett Packard and Siemens. Mr. Mattes currently serves as a member of the Supervisory Board of ams-OSRAM AG and as Chairman of the Supervisory Board of AT&S AG (Austria Technologie & Systemtechnik), and serves on the board of directors of Cohu, Inc. (Nasdaq: COHU).

Mr. Mattes will receive an annual cash retainer of $80,000 for service as a member of the Board and an additional annual cash retainer of $20,000 for service as chair of the Compensation Committee of the Board. In addition, Mr. Mattes is eligible to participate in the 2025 Management Incentive Compensation Plan. Mr. Mattes will receive an initial equity award of restricted stock units (“RSUs”) with a grant date fair value equal to $500,000, which will vest as to one-third of the RSUs on the first anniversary of the date of grant and as to the remaining RSUs in equal quarterly installments over the following two years. Mr. Mattes will also be eligible for an annual equity award of RSUs with a grant date fair value equal to $200,000, which will vest in full on the first anniversary of the date of grant.

In connection with his election, Mr. Mattes will enter into the Company’s standard indemnification agreement for directors and officers, a copy of which is filed as Exhibit 10.6 to the Company’s Form 10-Q filed with the Securities and Exchange Commission (the “SEC”) on November 7, 2025, and is incorporated herein by reference.

There are no arrangements or understandings pursuant to which Mr. Mattes was elected as a director. Mr. Mattes is not a party to any transaction that would require disclosure under Item 404(a) of Regulation S-K promulgated under the Securities Act of 1933, as amended. The Board determined that Mr. Mattes satisfies the New York Stock Exchange definition of “independent director.”

A copy of the Company’s press release announcing the appointment of Mr. Mattes is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Item 8.01 Other Events.

2026 Annual Meeting of Stockholders

The Company expects to hold its 2026 Annual Meeting of Stockholders (the “2026 Annual Meeting”) on Tuesday, October 27, 2026. As the date of the 2026 Annual Meeting has been advanced by more than 30 days from the anniversary date of the Company’s 2025 Annual Meeting of Stockholders held on December 16, 2025 (the “2025 Annual Meeting”), in accordance with Rule 14a-5(f) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Company is informing its stockholders of such change. The time, location, and format of the 2026 Annual Meeting will be as set forth in the Company’s proxy statement for the 2026 Annual Meeting (the “Proxy Statement”).

The previously announced deadlines for submitting stockholder proposals under Rule 14a-8 under the Exchange Act (“Rule 14a-8”), as well as the deadlines for submitting director nominations or other proposals outside of Rule 14a-8 pursuant to the Company’s Bylaws and Rule 14a-19 of the Exchange Act, as set forth in the Company’s proxy statement for the 2025 Annual Meeting, filed with the SEC on October 23, 2025, no longer apply.

To be included in the proxy materials for the 2026 Annual Meeting, stockholder proposals submitted in compliance with Rule 14a-8 must be received in writing no later than August 7, 2026, which the Company has determined to be a reasonable time before it expects to begin printing and distributing its proxy materials for the 2026 Annual Meeting. Any written communication should be addressed to the attention of the Corporate Secretary at Wolfspeed, Inc., 4600 Silicon Drive, Durham, North Carolina 27703.

In accordance with the Company’s Bylaws, if an eligible stockholder wishes to make a nomination for director, or wishes to introduce any business at the 2026 Annual Meeting, such stockholder must give the Company advance notice in accordance with the Company’s Bylaws. To be timely, the Company must receive such notice for its 2026 Annual Meeting at the address set forth above no later than August 7, 2026.

In addition, to comply with the universal proxy rules, stockholders who have properly and timely submitted a nomination for a director or directors and intend to solicit proxies in support of director nominees other than the Company’s nominees for the 2026 Annual Meeting must provide notice that sets forth the information required by Rule 14a-19 under the Exchange Act, which notice must be postmarked or transmitted electronically to the Company at its principal executive offices no later than August 28, 2026.

All proposals, nominations, and/or notices must be delivered to the Company in compliance with all applicable SEC rules and regulations and the Company’s Bylaws.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description of Exhibit

99.1

Press release dated July 29, 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 hereunto duly authorized.

WOLFSPEED, INC.

By: /s/ Melissa Garrett

Melissa Garrett

Senior Vice President and General Counsel

Date: July 29, 2026

EX-99.1

Filename: exhibit99_1072926.htm · Sequence: 2

Document

Exhibit 99.1

FOR IMMEDIATE RELEASE

Wolfspeed strengthens Board with Appointment of Semiconductor and Technology Executive Andy W. Mattes

New Board member Andy W. Mattes brings deep industry expertise together with proven record leading global public companies through transformation and growth

DURHAM, N.C. — July 29, 2026 — Wolfspeed, Inc. (NYSE: WOLF), a global leader in silicon carbide technology, announced today that Andy W. Mattes has been appointed to its Board of Directors, effective immediately.

Andy W. Mattes is a technology executive with more than 40 years of leadership experience in the semiconductor and advanced technology industries. He previously served as public-company CEO of Coherent and Diebold Nixdorf and has held senior leadership roles at Hewlett Packard, Siemens and McKinsey & Company. Mattes also has more than two decades of public-company Board experience and currently serves on the Board of AT&S AG, ams OSRAM AG and Cohu, Inc. Throughout his career, Mattes has built a strong record of strategic leadership, operational excellence and industry relationships. His experience in technology, operations and corporate governance will support Wolfspeed’s focus on disciplined execution and long-term growth.

“Andy Mattes is a distinguished global technology leader whose experience and strategic perspective will be a tremendous asset to our Board,” said Robert Feurle, CEO of Wolfspeed. “We are pleased to welcome Andy to the Board as Wolfspeed enters its next phase of growth. His proven leadership and industry expertise will be invaluable during this transformative period for the company as it executes its strategic priorities, reinforces its market leadership in silicon carbide, and capitalizes on compelling long-term opportunities.”

Andy Mattes added, “I am excited to join Wolfspeed at this pivotal time in its evolution and to contribute to the company’s mission, strategy and future growth. Wolfspeed’s leadership in silicon carbide addresses critical needs across power electronics, electrification, energy efficiency and advanced industrial applications. Robert Feurle and the management team have taken foundational steps over the past year to position the company for continued progress, and I look forward to partnering with the Board and leadership team as Wolfspeed advances its strategy and creates long-term value for all stakeholders.”

###

About Wolfspeed, Inc.

Wolfspeed (NYSE: WOLF) leads the market in the worldwide adoption of silicon carbide technologies that power the world’s most disruptive innovations. As the pioneers of silicon carbide, and creators of the most advanced semiconductor technology on earth, we are committed to powering a better world for everyone. Through silicon carbide material, Power Modules, Discrete Power Devices and Power Die Products targeted for various applications, we will bring you The Power to Make It RealTM. Learn more at www.Wolfspeed.com.

Wolfspeed® is a registered trademark and The Power to Make It Real™ is a trademark of Wolfspeed, Inc.

Forward-Looking Statements

This press release contains forward-looking statements involving risks and uncertainties, both known and unknown, that may cause Wolfspeed’s actual results to differ materially from those indicated in the forward-looking statements. Forward-looking statements by their nature address matters that are, to different degrees, uncertain, such as statements about Wolfspeed’s strategic plans, priorities, growth opportunities, and ability to achieve profitability. Actual results could differ materially due to factors detailed in Wolfspeed’s filings with the U.S. Securities and Exchange Commission (“SEC”), including its most recent Annual Report on Form 10-K and subsequent SEC filings. These forward-looking statements represent Wolfspeed’s judgment as of the date of this release. Except as required under U.S. federal securities laws, Wolfspeed disclaims any intent or obligation to update any forward-looking statements after the date of this release.

Media Relations: media@wolfspeed.com

Investor Relations: investorrelations@wolfspeed.com

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