Sean D. Keohane - 12 Dec 2025 Form 4 Insider Report for CABOT CORP (CBT)

Role: President and CEO, Director
Signature: By: Jennifer Lombardi, pursuant to a power of attorney from Sean D. Keohane
Issuer symbol: CBT
Transactions as of: 12 Dec 2025
Net transactions value: +$19,949
Form type: 4
Filing time: 16 Dec 2025, 17:00:05 UTC
Previous filing: 21 Nov 2025
Next filing: 05 Jan 2026
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: Jennifer Lombardi, pursuant to a power of attorney from Sean D. Keohane	16 Dec 2025	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	$19,949	+292	+0.66%	$68.34	44,623	12 Dec 2025	Common Stock	292		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	Represents dividends paid on phantom stock units acquired under the Corporation's Supplemental 401(k) Plan and are to be settled upon the reporting person's retirement or other termination of employment.