BCPE Watson (DE) BML, LP → COHERENT CORP. COHR

Item 4 of the Initial Statement is hereby amended and supplemented to add the following: Conversion of Convertible Preferred Stock and sale of Common Stock On November 7, 2025 the Reporting Persons converted 54,023 shares of Series B-1 Convertible Preferred Stock, no par value per share, held by the Reporting Persons into 7,754,252 shares of Common Stock in accordance with the terms of the Statement with Respect to Shares. On November 7, 2025, the Reporting Person sold 7,500,000 shares of Common Stock in a block trade pursuant to Rule 144 of the Securities Act of 1933 at a price of $143.37 per share, for an aggregate amount of $1,075,275,000. On November 10, 2025 the Reporting Person distributed an aggregate of 254,252 shares of Common Stock to one or more members or partners of the Reporting Person in connection with certain charitable gifts to be made by such members or partners or their direct and indirect owners, for no consideration.