X0306 4 2022-05-24 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 Common Stock 2022-05-24 4 M 0 14297 47.62 A 280015 D Common Stock 2022-05-24 4 S 0 3340 68.26 D 276675 D Common Stock 2022-05-24 4 S 0 10018 69.37 D 266657 D Common Stock 2022-05-24 4 S 0 939 69.95 D 265718 D Common Stock 13018 I Through the Trustees for the Corporation's Retirement Savings Plan Stock Options 47.62 2022-05-24 4 M 0 14297 47.62 A 2023-11-07 Cabot Corp 14297 0 D The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $67.82 to $68.82, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, the Corporation or any security holder of the Corporation, upon request, full information regarding the number of shares sold at each separate price. The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $68.83 to $69.37, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, the Corporation or any security holder of the Corporation, upon request, full information regarding the number of shares sold at each separate price. The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $69.85 to $70.07, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, the Corporation or any security holder of the Corporation, upon request, full information regarding the number of shares sold at each separate price. Reflects retirement plan contributions by the Corporation, including contributions that have occurred since the date of the reporting person's last ownership report. 15,173 shares were subject to the option. The option vested over a three year period as follows: 30% on November 8, 2014, 30% on November 8, 2015 and 40% on November 8, 2016. By: Jennifer Lombardi, pursuant to a power of attorney from Sean D. Keohane 2022-05-26