0000016040 2026-05-05 2026-05-05 0000016040 false 8-K 2026-05-05 Cabot Corporation DE 1-5667 04-2271897 2 Seaport Lane Suite 1400 Boston MA 02210-2019 (617) 345-0100 false false false false false Common Stock, $1 par value per share CBT NYSE