X0609 4 2025-11-28 false 0000820318 COHERENT CORP. COHR 0001691463 Mocciaro Ilaria false C/O COHERENT CORP. 375 SAXONBURG BOULEVARD SAXONBURG PA 16056 false true false false Chief Accounting Officer false Common Stock 2025-11-28 4 F false 1130 154 D 24280 D Common Stock 2026-02-28 4 F false 636 258.93 D 22267 D This transaction was inadvertently reported late due to an administrative error and not through any fault of the reporting person. Withheld shares are in connection with the vesting of a restricted stock unit award of 7,647 shares granted to the reporting person on November 28, 2024. The restricted stock units vest in three annual installments beginning November 28, 2025. 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. Reflects holdings as of November 28, 2025 and does not reflect previously reported transactions occurring after such date. The amount of securities beneficially owned reported on the reporting person's Form 4 filed on December 3, 2025 did not reflect the disposition of 1,130 shares reported herein on November 28, 2025. The reporting person beneficially owned 22,903 shares following the transaction reported on December 3, 2025. The amount of securities beneficially owned reported on the reporting person's Form 4 filed on September 1, 2026 reflects the dispositions reported herein. Withheld shares are in connection with the vesting of a restricted stock unit award of 6,261 shares granted to the reporting person on February 28, 2023. The restricted stock units vest in three annual installments beginning February 28, 2024. Reflects holdings as of February 28, 2026 and does not reflect previously reported transactions occurring after such date. /s/ Christopher M. Forrester, Attorney-in-Fact 2026-10-07