0000947871-25-000512.txt : 20250514 0000947871-25-000512.hdr.sgml : 20250514 20250514212017 ACCESSION NUMBER: 0000947871-25-000512 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20250513 FILED AS OF DATE: 20250514 DATE AS OF CHANGE: 20250514 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Koeppen Christopher CENTRAL INDEX KEY: 0001781635 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-39375 FILM NUMBER: 25948201 MAIL ADDRESS: STREET 1: C/O COHERENT CORP. STREET 2: 375 SAXONBURG BOULEVARD CITY: SAXONBURG STATE: PA ZIP: 16056 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: COHERENT CORP. CENTRAL INDEX KEY: 0000820318 STANDARD INDUSTRIAL CLASSIFICATION: OPTICAL INSTRUMENTS & LENSES [3827] ORGANIZATION NAME: 08 Industrial Applications and Services EIN: 251214948 STATE OF INCORPORATION: PA FISCAL YEAR END: 0630 BUSINESS ADDRESS: STREET 1: 375 SAXONBURG BLVD CITY: SAXONBURG STATE: PA ZIP: 16056 BUSINESS PHONE: 724-352-4455 MAIL ADDRESS: STREET 1: 375 SAXONBURG BLVD CITY: SAXONBURG STATE: PA ZIP: 16056 FORMER COMPANY: FORMER CONFORMED NAME: II-VI INC DATE OF NAME CHANGE: 19920703 4 1 ownership.xml X0508 4 2025-05-13 0 0000820318 COHERENT CORP. COHR 0001781635 Koeppen Christopher C/O COHERENT CORP. 375 SAXONBURG BLVD. SAXONBURG PA 16056 0 1 0 0 EVP of Aerospace & Defense 1 Common Stock 2025-05-13 4 M 0 6154 36.56 A 61492 D Common Stock 2025-05-13 4 S 0 6154 80.00 D 55338 D Common Stock 2025-05-13 4 S 0 2581 80.00 D 52757 D Common Stock 2025-05-13 4 S 0 2545 80.00 D 50212 D Common Stock 15 I By Daughter Common Stock 15 I By Son Option (Right to buy) 36.56 2025-05-13 4 M 0 6154 0.00 D 2029-08-28 Common Stock 6154 6154 D The sale transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 9, 2024. The options fully vested in four equal annual installments beginning on August 28, 2020. Exhibit 24 - Power of Attorney /s/ Christopher M. Forrester, Attorney-in-Fact 2025-05-14 EX-24 2 ss4824838_ex24.htm SUBSTITUTE POWER OF ATTORNEY

SUBSTITUTE POWER OF ATTORNEY

Under the terms of powers of attorney (each, a “Power of Attorney”) previously filed with the U.S. Securities and Exchange Commission, the undersigned, Jeffrey W. Acre was appointed an attorney-in-fact to, among other things, execute for and on behalf of the following individuals any Forms 3, 4 and 5 or any amendments thereto, in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended, and the rules thereunder:

Christopher Koeppen

Giovanni Barbarossa

Michael L. Dreyer

Patricia Hatter

Lisa Neal-Graves

Shaker Sadasivam

Howard H. Xia

Joseph J. Corasanti

Enrico Digirolamo

In accordance with the authority granted under each Power of Attorney, including the full power of substitution, the undersigned hereby appoints Aaron Wax, Chris Forrester and Yian Huang as substitute attorneys-in-fact, on behalf of the individuals listed above, with the power to exercise and execute all of the powers granted or conferred in the original Power of Attorney. By their signatures as attorneys-in-fact to this Substitute Power of Attorney, Aaron Wax, Chris Forrester and Yian Huang accept such appointment and agree to assume from the undersigned any and all duties and responsibilities attendant to their capacity as attorneys-in-fact.

This Substitute Power of Attorney shall remain in full force and effect until the underlying Power of Attorney is revoked or terminated, unless earlier revoked by the undersigned in a signed writing.

IN WITNESS WHEREOF, the undersigned has caused this Substitute Power of Attorney to be executed as of March 18, 2025.

Signature: /s/ Jeffrey W. Acre
Name: Jeffrey W. Acre

We accept this appointment and substitution:

Signature: /s/ Aaron Wax
Name: Aaron Wax

Signature: /s/ Chris Forrester
Name: Chris Forrester

Signature: /s/ Yian Huang
Name: Yian Huang