Sean D. Keohane - 31 Dec 2025 Form 4 Insider Report for CABOT CORP (CBT)

Role: President and CEO, Director
Signature: By: Mazda Cintron, pursuant to a power of attorney from Sean D. Keohane
Issuer symbol: CBT
Transactions as of: 31 Dec 2025
Net transactions value: +$169,865
Form type: 4
Filing time: 05 Jan 2026, 15:58:21 UTC
Previous filing: 16 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Keohane Sean D	President and CEO, Director	C/O CABOT CORPORATION, TWO SEAPORT LANE, SUITE 1400, BOSTON	By: Mazda Cintron, pursuant to a power of attorney from Sean D. Keohane	05 Jan 2026	0001435737

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CBT	Phantom Stock Units	Award	$169,865	+2,563	+5.7%	$66.28	47,186	31 Dec 2025	Common Stock	2,563		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	1 for 1
F2	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.