William F. Masterson III - 31 Dec 2025 Form 4 Insider Report for CABOT CORP (CBT)

Role
Senior Vice President
Signature
By: Mazda Cintron, pursuant to a power of attorney from William F. Masterson, III
Issuer symbol
CBT
Transactions as of
31 Dec 2025
Net transactions value
+$15,151
Form type
4
Filing time
05 Jan 2026, 15:59:51 UTC
Previous filing
16 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Masterson William F III Senior Vice President C/O CABOT CORPORATION, TWO SEAPORT LANE, SUITE 1400, BOSTON By: Mazda Cintron, pursuant to a power of attorney from William F. Masterson, III 05 Jan 2026 0002098902

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 $15,151 +229 +78% $66.28 520 31 Dec 2025 Common Stock 229 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.