X0306 4 2022-09-30 0 0000016040 CABOT CORP CBT 0001435737 Keohane Sean D C/O CABOT CORPORATION TWO SEAPORT LANE, SUITE 1400 BOSTON MA 02210 1 1 0 0 President and CEO Phantom Stock Units 63.89 2022-09-30 4 A 0 598.3243 63.89 A Common Stock 598.3243 35947.9492 D 1 for 1 The reported phantom stock units were acquired under the Corporation's supplemental 401(k) plan and are to be settled upon the reporting person's retirement or other termination of service in accordance with the provisions of the plan. By: Jennifer Lombardi, pursuant to a power of attorney from Sean D. Keohane 2022-10-03