| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Dumont Lisa M | VP, Controller & CAO | C/O CABOT CORPORATION, TWO SEAPORT LANE, SUITE 1400, BOSTON | By: Jennifer Lombardi, pursuant to a power of attorney from Lisa M. Dumont | 21 Nov 2025 | 0001800538 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CBT | Common Stock | Award | $0 | +1,606 | +17% | $0.000000 | 11,014 | 19 Nov 2025 | Direct | |
| transaction | CBT | Common Stock | Award | $0 | +901 | +8.2% | $0.000000 | 11,915 | 19 Nov 2025 | Direct | F1 |
| transaction | CBT | Common Stock | Tax liability | $11,952 | -200 | -1.7% | $59.76 | 11,715 | 19 Nov 2025 | Direct | |
| holding | CBT | Common Stock | 1,599 | 19 Nov 2025 | Through the Trustee for the Corporation's 401(k) Plan |
| Id | Content |
|---|---|
| F1 | Consists of performance based units earned on the basis of the Corporation's performance in fiscal year 2025, of which 637 remain subject to time-based vesting. |