Masterson William F III has filed 5 insider transactions across 1 company since December 2025.
Most recent transaction: a grant/award of 3 shares of CABOT CORP ($CBT) on March 13, 2026.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 13, 2026 | CABOT CORP | $CBT | Masterson William F III | Senior Vice President | A | Phantom Stock Units | 3 | $69.49 | 523.7950 | 52,900,000 | 0.65% | 0.00% |
| Dec. 31, 2025 | CABOT CORP | $CBT | Masterson William F III | Senior Vice President | A | Phantom Stock Units | 229 | $66.28 | 520.4248 | 54,200,000 | 78.33% | 0.00% |
| Dec. 12, 2025 | CABOT CORP | $CBT | Masterson William F III | Senior Vice President | A | Phantom Stock Units | 2 | $68.34 | 291.8366 | 54,200,000 | 0.66% | 0.00% |
| Dec. 3, 2025 | CABOT CORP | $CBT | Masterson William F III | Senior Vice President | A | Common Stock | 3486 | $0.00 | 7,210.0000 | 54,200,000 | 93.61% | 0.01% |
| Dec. 3, 2025 | CABOT CORP | $CBT | Masterson William F III | Senior Vice President | A | Employee Stock Option (Right to Buy) | 12767 | $0.00 | 12,767.0000 | 54,200,000 | 9999.99% | 0.02% |