Form 4 Filing for Raffiq Nathoo

This filing details a transaction by Raffiq Nathoo, a director at Cabot Corp (CBT). On September 30, 2026, Nathoo acquired 360.8113 Phantom Stock Units, with a value of $76.91 per unit. These units are convertible to 360.8113 shares of common stock. Following this transaction, Nathoo holds 2249.8641 shares. The phantom stock is set to be settled in cash upon termination of service as a director or based on Nathoo's distribution election, whichever occurs first. The filing was signed by Mazda Cintron on behalf of Raffiq Nathoo.