Wolfspeed Inc美股招股说明书(2026-03-09版)

WOLFSPEED, INC. This prospectus supplement updates, amends and supplements the prospectus dated December15, 2025 (the “Prospectus”), which forms a part of ourRegistration Statement on Form S-1 (Registration No.333-291524). Capitalized terms used in this prospectus supplement and not otherwise definedherein have the meanings specified in the Prospectus. This prospectus supplement is being filed to update, amend and supplement the information included in the Prospectus with the information contained inour Current Report on Form 8-K, filed with the Securities and Exchange Commission (“SEC”) on March9, 2026, which is set forth below. This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read in conjunction with the Prospectus,which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in thisprospectus supplement updates or supersedes the information contained in the Prospectus. Please keep this prospectus supplement with your Prospectusfor future reference. Our shares of Common Stock are listed on the New York Stock Exchange (the “NYSE”) under the symbol “WOLF.” On March6, 2026, the closing saleprice of our Common Stock was $16.57 per share. Investing in shares of our Common Stock involves a high degree of risk. You should carefully review the risks anduncertainties that are described in the “Risk Factors” section beginning on page 6 of the Prospectus and under similarheadings in any amendments or supplements to the Prospectus or in the documents incorporated by reference into theProspectus. Neither the U.S. Securities and Exchange Commission (the “SEC”) nor any state securities commission has approved or disapproved of thesesecurities or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is acriminal offense. UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549 FORM 8-K CURRENT REPORTPursuant to Section13 OR 15(d)of The Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March9, 2026 WOLFSPEED, INC. (Exact name of registrant as specified in its charter) 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 thefollowing 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 Section12(b) of the Act: 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 anynew or revised financial accounting standards provided pursuant to Section13(a) of the Exchange Act.☐ Item 8.01. Other Events On March9, 2026, Wolfspeed, Inc. (the “Company”) disclosed certain unaudited pro forma consolidated financial information and explanatory notes(the “Pro Forma Financial Information”) for the Company and its consolidated subsidiaries. The Pro Forma Financial Information is provided forinformational purposes only and gives effect to (i)the Company’s prepackaged plan of reorganization (the “Plan”), which became effective onSeptember29, 2025 (the “Effective Date”), as described in the Company’s Quarterly Report on Form 10-Q for the quarter ended September28, 2025,filed with the Securities and Exchange Commission on November7, 2025, (ii) the Company’s adoption of fresh start accounting on the Effective Date inaccordance with Accounting Standards Codification 852, “Reorganizations,” and (iii)receipt of Regulatory Approvals (as defined in the Plan), whichoccurred on January29, 2026. Item 9.01. Financial Statements and Exhibits (b) Pro Forma Financial Information. The following Pro Forma Financial Information, giving effect to the Plan, adoption of fresh start accounting on the Effective Date and receipt ofRegulatory Approvals on January29, 2026, is attached as Exhibit 99.1 hereto and incorporated herein by reference: unaudited pro forma consolidatedstatements of operations for the year ended June29, 2025 and for the six months ended December28, 2025. (d) Exhibits ExhibitNo.Description of Exhibit99.1Unaudited Pro Forma Consolidated Financial Information104Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURE Pursuant to the requirements of the Securities Exchange