FORM10-K ☒Annual Report pursuant to Section13 or 15(d) of the Securities Exchange Act of 1934 COHERENT CORP. (Exact name of registrant as specified in its charter) Pennsylvania(State or other jurisdiction ofincorporation or organization)375 Saxonburg Blvd.Saxonburg,PA(Address of principal executive offices) 25-1214948(I.R.S. EmployerIdentification No.) Registrant’s telephone number, including area code:724-352-4455Securities registered pursuant to Section12(b) of the Act: Securities registered pursuant to Section12(g) of the Act: NoneIndicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☒No☐ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports),and (2) has been subject to such filing requirements for the past 90 days.Yes☒No☐Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit such files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reportingcompany, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reportingcompany,” and “emerging growth company” in Rule 12b-2 of the Exchange Act: Large Accelerated Filer☒Acceleratedfiler☐Non-acceleratedfiler☐Smallerreportingcompany☐Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectivenessof its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registeredpublic accounting firm that prepared or issued its audit report.☒ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of theregistrant included in the filing reflect the correction of an error to previously issued financial statements. Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-basedcompensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒ Aggregate market value of outstanding common stock, no par value, held by non-affiliates of the Registrant at December31, 2024,was approximately $14,625,992,855based on the closing sale price reported on the Nasdaq Global Select Market. For purposes of thiscalculation only, directors and executive officers of the Registrant and their spouses are deemed to be affiliates of the Registrant. Number of outstanding shares of common stock, no par value, at August11, 2025, was155,805,474. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s definitive proxy statement, which will be issued in connection with the 2025 Annual Meeting ofShareholders of Coherent Corp., are incorporated by reference into Part III of this Annual Report on Form 10-K. Forward-Looking Statements This Annual Report on Form 10-K (including certain information incorporated herein by reference) contains forward-lookingstatements made pursuant to Section21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the safeharbor provisions of the Private Securities Litigation Reform Act of 1995 (the “PSLRA”). The statements in this Annual Report onForm 10-K that are not purely historical are forward-looking statements, including, without limitation, statements regarding ourexpectations, assumptions, beliefs, intentions or strategies regarding the future.In some cases, these forward-looking statements can beidentified by terminology such as, “may,” “will,” “should,” “expects,” “plans,” “anticipates,” “believes,” “intends,” “estimates,”“predicts,” “projects,” “potential,” or “continue” or the negative of these terms or other comparable terminology. Forward-lookingstatements address, among other things, our assumptions, our expectations, our assessments of the size and growth rates of ourmarkets, our growth strategies, our effor