Form4.ai tracks every SEC insider trade in real time. See every CBT insider filing with a free account — no card.
See every CBT insider filing — free account, no card.
Free accountCABOT CORP (CBT) has 8 SEC Form 4 insider filings on record in the last 90 days. Most recent filing: Oct. 1, 2026.
Open-market value, last 90 days
No open-market buys or sales in this period.
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Oct 1, 2026 SEC filing | Masterson William F III Senior Vice President | Holdings only | $1,858 | — |
| Oct 1, 2026 SEC filing | McLaughlin Erica Executive Vice President, CFO | Holdings only | $7,195 | — |
| Oct 1, 2026 SEC filing | Kalita Karen A SVP and General Counsel | Holdings only | $3,452 | — |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.