| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Dumont Lisa M | VP, Controller & CAO | C/O CABOT CORPORATION, TWO SEAPORT LANE, SUITE 1400, BOSTON | By: Mazda Cintron, pursuant to a power of attorney from Lisa M. Dumont | 12 Nov 2025 | 0001800538 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CBT | Common Stock | Tax liability | $21,985 | -358 | -3.7% | $61.41 | 9,408 | 11 Nov 2025 | Direct | |
| holding | CBT | Common Stock | 1,599 | 11 Nov 2025 | Through the Trustee for the Corporation's 401(k) Plan |