Insider · CIK 0002098902
William F Masterson III
officer
Files at CBT (CABOT CORP). First filing -, latest -.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 0
$0 bought, $0 sold
Signals
This insider’s open-market buys and sells, scored.
No scored open-market trades yet.
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 30, 2026 | CBT CABOT CORP | AGrant or award Phantom Stock Unitsderivative | +24 | $76.91 | $1,858 | 554 | 11 d ago |
| Sep 11, 2026 | CBT CABOT CORP | AGrant or award Phantom Stock Unitsderivative | +3 | $79.68 | $249 | 530 | 28 d ago |
| Dec 12, 2025 | CBT CABOT CORP | AGrant or award Phantom Stock Unitsderivative | +2 | $68.34 | $130 | 292 | Dec 16, 2025 |
| Dec 3, 2025 | CBT CABOT CORP | AGrant or award Common Stock | +3,486 | $0.00 | $0 | 7,210 | Dec 5, 2025 |
| Dec 3, 2025 | CBT CABOT CORP | AGrant or award Employee Stock Option (Right to Buy)derivative | +12,767 | $0.00 | $0 | 12,767 | Dec 5, 2025 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.