William C. Kirby - 08 Jan 2026 Form 4 Insider Report for CABOT CORP (CBT)

Role: Director
Signature: By: Jennifer Lombardi, pursuant to a power of attorney from William C. Kirby
Issuer symbol: CBT
Transactions as of: 08 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 12 Jan 2026, 17:00:03 UTC
Previous filing: 14 Jan 2025
Next filing: 27 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Kirby William C.	Director	C/O CABOT CORPORATION, TWO SEAPORT LANE, SUITE 1400, BOSTON	By: Jennifer Lombardi, pursuant to a power of attorney from William C. Kirby	12 Jan 2026	0001413483

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CBT	Common Stock	Award	$0	+486	+1.8%	$0.000000	27,688	08 Jan 2026	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The shares have been deferred pursuant to Cabot's Non-Employee Directors' Deferral Plan.