Coherent (COHR)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-28 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: COHERENT CORP. (COHR) CIK: 0000820318 --- Reporting Owner --- Name: Mocciaro Ilaria CIK: 0001691463 Role: Officer (Chief Accounting Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-08-28 | Code: A (Grant or award) Shares: +1,612 | Price: $0.00 Shares Owned After: 23,879 | Ownership: D (Direct) Footnotes: [F1] These shares represent a restricted stock unit award granted to the reporting person. One-third (1/3) of the restricted stock units will vest on August 28, 2027, and the remaining two-thirds (2/3) of the restricted stock units will vest in eight equal quarterly installments beginning on November 28, 2027. [Transaction #2] Security: Common Stock Date: 2026-08-28 | Code: A (Grant or award) Shares: +2,449 | Price: $0.00 Shares Owned After: 26,328 | Ownership: D (Direct) Footnotes: [F2] Represents shares issued upon payout of the Performance Stock Units granted in August 2023. Of the total 4,784 Performance Stock Units that were subject to vesting on the transaction date, the reporting person elected to defer settlement of 2,335 of the underlying shares of common stock pursuant to the Coherent Corp. Deferred Compensation Plan; the deferred Performance Stock Units are reported in Table II. The remaining 2,449 underlying shares of common stock were settled, of which 758 shares were withheld for taxes and 1,691 shares were delivered to the reporting person. [Transaction #3] Security: Common Stock Date: 2026-08-28 | Code: F (Payment of exercise/tax) Shares: -2,174 | Price: $295.39 Total Value: $642,177.86 Shares Owned After: 24,154 | Ownership: D (Direct) Footnotes: [F3] These shares were withheld by the company to discharge withholding tax obligations of the reporting person and do not constitute an actual sale or other open market transaction. --- Derivative Transactions --- [Transaction #1] Security: Deferred Performance Stock Units Date: 2026-08-28 | Code: A (Grant or award) Shares: +2,335 Shares Owned After: 2,335 | Ownership: D (Direct) Footnotes: [F4] Represents deferred stock units acquired upon the reporting person's election to defer settlement of 2,392 shares of the vested Performance Stock Units under the Coherent Corp. Deferred Compensation Plan (the "Plan"). Of the 2,392 deferred stock units, 57 units were withheld to satisfy FICA tax obligations, resulting in 2,335 deferred stock units credited to the reporting person's Plan account. The deferred stock units are deemed invested in our common stock and are payable solely in shares of common stock upon a qualifying distribution event under the Plan. [F4] Represents deferred stock units acquired upon the reporting person's election to defer settlement of 2,392 shares of the vested Performance Stock Units under the Coherent Corp. Deferred Compensation Plan (the "Plan"). Of the 2,392 deferred stock units, 57 units were withheld to satisfy FICA tax obligations, resulting in 2,335 deferred stock units credited to the reporting person's Plan account. The deferred stock units are deemed invested in our common stock and are payable solely in shares of common stock upon a qualifying distribution event under the Plan. [F4] Represents deferred stock units acquired upon the reporting person's election to defer settlement of 2,392 shares of the vested Performance Stock Units under the Coherent Corp. Deferred Compensation Plan (the "Plan"). Of the 2,392 deferred stock units, 57 units were withheld to satisfy FICA tax obligations, resulting in 2,335 deferred stock units credited to the reporting person's Plan account. The deferred stock units are deemed invested in our common stock and are payable solely in shares of common stock upon a qualifying distribution event under the Plan. [F4] Represents deferred stock units acquired upon the reporting person's election to defer settlement of 2,392 shares of the vested Performance Stock Units under the Coherent Corp. Deferred Compensation Plan (the "Plan"). Of the 2,392 deferred stock units, 57 units were withheld to satisfy FICA tax obligations, resulting in 2,335 deferred stock units credited to the reporting person's Plan account. The deferred stock units are deemed invested in our common stock and are payable solely in shares of common stock upon a qualifying distribution event under the Plan. [F4] Represents deferred stock units acquired upon the reporting person's election to defer settlement of 2,392 shares of the vested Performance Stock Units under the Coherent Corp. Deferred Compensation Plan (the "Plan"). Of the 2,392 deferred stock units, 57 units were withheld to satisfy FICA tax obligations, resulting in 2,335 deferred stock units credited to the reporting person's Plan account. The deferred stock units are deemed invested in our common stock and are payable solely in shares of common stock upon a qualifying distribution event under the Plan. --- Footnotes (Complete Index) --- F1: These shares represent a restricted stock unit award granted to the reporting person. One-third (1/3) of the restricted stock units will vest on August 28, 2027, and the remaining two-thirds (2/3) of the restricted stock units will vest in eight equal quarterly installments beginning on November 28, 2027. F2: Represents shares issued upon payout of the Performance Stock Units granted in August 2023. Of the total 4,784 Performance Stock Units that were subject to vesting on the transaction date, the reporting person elected to defer settlement of 2,335 of the underlying shares of common stock pursuant to the Coherent Corp. Deferred Compensation Plan; the deferred Performance Stock Units are reported in Table II. The remaining 2,449 underlying shares of common stock were settled, of which 758 shares were withheld for taxes and 1,691 shares were delivered to the reporting person. F3: These shares were withheld by the company to discharge withholding tax obligations of the reporting person and do not constitute an actual sale or other open market transaction. F4: Represents deferred stock units acquired upon the reporting person's election to defer settlement of 2,392 shares of the vested Performance Stock Units under the Coherent Corp. Deferred Compensation Plan (the "Plan"). Of the 2,392 deferred stock units, 57 units were withheld to satisfy FICA tax obligations, resulting in 2,335 deferred stock units credited to the reporting person's Plan account. The deferred stock units are deemed invested in our common stock and are payable solely in shares of common stock upon a qualifying distribution event under the Plan. --- Signature --- /s/ /s/ Christopher M. Forrester, Attorney-in-Fact (2026-09-01)