CABOT CORP — Director's Dealing 2025

Nov 21, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CABOT CORP (CBT)
CIK: 0000016040
Period of Report: 2025-11-19

Reporting Person: Keohane Sean D (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-19	Common Stock	A	32630	—	Acquired	383540	Direct
2025-11-19	Common Stock	A	30932	—	Acquired	414472	Direct
2025-11-19	Common Stock	F	10338	$59.76	Disposed	404134	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-11-19	Employee Stock Option (Right to Buy)	$59.76	A	122114	Acquired	2035-11-18	Common Stock (122114)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	13933.1846	Indirect

Footnotes

F1: Consists of performance based units earned on the basis of the Corporation's performance in fiscal year 2025, of which 22,630 remain subject to time-based vesting.

F2: The option vests over a three year period as follows: 30% on November 19, 2026, 30% on November 19, 2027 and 40% on November 19, 2028.