‡ Identifies management contract or compensatory plans or arrangements required to be filed as an exhibit. ** Furnished herewith. 128 Incorporated by reference herein Form Exhibit No. Filing Date File No. 8-K 10.1 May 9, 2017 001-33962 10-Q 10.2 August 9, 2017 001-33962 Exhibit Numbers 10.25 Amendment No. 1 and Waiver to Credit Agreement, dated as of May 8, 2017, by and among Coherent, Inc., Coherent Holding GmbH, the Guarantors party thereto, the Lenders party thereto and Barclays Bank PLC, as Administrative Agent 10.26 Amendment No. 2 to Credit Agreement, dated as of July 5, 2017, by and among Coherent, Inc., Coherent Holding GmbH, the Guarantors party thereto and Barclays Bank PLC as Administrative Agent 21.1 Subsidiaries 23.1 Consent of Independent Registered Public Accounting Firm 24.1 Power of Attorney (see signature page) 31.1 Certification of Chief Executive Officer pursuant to Exchange Act Rule 13a- 14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2 Certification of Chief Financial Officer pursuant to Exchange Act Rule 13a- 14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 32.1** Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32.2** Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 101.INS Inline XBRL Instance 101.SCH Inline XBRL Taxonomy Extension Schema 101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase 101.DEF Inline XBRL Taxonomy Extension Definition Linkbase 101.LAB Inline XBRL Taxonomy Extension Label Linkbase 101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase 104 Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)