Masterson William F III
SEC insider (Form 3/4/5 filer). CIK 0002098902. Senior Vice President at CABOT CORP (CBT). 7 reported Form 4/5 transactions since Sep 2024; latest on Sep 30, 2026. Located in BOSTON, MA.
Companies Masterson William F III has filed insider reports for
- CABOT CORP (CBT): Officer, Senior Vice President
Masterson William F III
CIK: 0002098902
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
CABOT CORP
Discretionary Trading P&L
Holdings
Transaction History (7 total)
- Sep 30, 2026CBT
CABOT CORP
AwardDirectPhantom Stock Units
24 shares at avg. $76.91- - Sep 11, 2026CBT
CABOT CORP
AwardDirectPhantom Stock Units
3 shares at avg. $79.68- - Jun 12, 2026CBT
CABOT CORP
AwardDirectPhantom Stock Units
3 shares at avg. $87.65- - Mar 13, 2026CBT
CABOT CORP
AwardDirectPhantom Stock Units
3 shares at avg. $69.49- - Dec 31, 2025CBT
CABOT CORP
AwardDirectPhantom Stock Units
229 shares at avg. $66.28- - Dec 12, 2025CBT
CABOT CORP
AwardDirectPhantom Stock Units
2 shares at avg. $68.34- - Dec 3, 2025CBT
CABOT CORP
AwardDirect3.5K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 30, 2026 | CBT CABOT CORP | Award Phantom Stock Units | 24 | $76.91 | - | Direct |
| Sep 11, 2026 | CBT CABOT CORP | Award Phantom Stock Units | 3 | $79.68 | - | Direct |
| Jun 12, 2026 | CBT CABOT CORP | Award Phantom Stock Units | 3 | $87.65 | - | Direct |
| Mar 13, 2026 | CBT CABOT CORP | Award Phantom Stock Units | 3 | $69.49 | - | Direct |
| Dec 31, 2025 | CBT CABOT CORP | Award Phantom Stock Units | 229 | $66.28 | - | Direct |
| Dec 12, 2025 | CBT CABOT CORP | Award Phantom Stock Units | 2 | $68.34 | - | Direct |
| Dec 3, 2025 | CBT CABOT CORP | Award | 3,486 | - | - | Direct |
1-7 of 7 transactions