Masterson William F III — SEC Form 4 filings
SEC reporting owner CIK 2098902. 6 Form 4 filings on record with FilingPulse; latest filed 2026-09-14.
Transaction summary — filings shown
Covers all 6 filings on record, filed 2025-12-05 to 2026-09-14. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 7.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| CABOT CORP (CBT) | Senior Vice President | 6 | — | — | 7 |
Form 4 filings — Masterson William F III
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-14 | 4 | CABOT CORP (CBT) | Grant/award (A): 3.12 (derivative) @ $79.68 | EDGAR |
| 2026-06-16 | 4 | CABOT CORP (CBT) | Grant/award (A): 2.82 (derivative) @ $87.65 | EDGAR |
| 2026-03-17 | 4 | CABOT CORP (CBT) | Grant/award (A): 3.37 (derivative) @ $69.49 | EDGAR |
| 2026-01-05 | 4 | CABOT CORP (CBT) | Grant/award (A): 228.59 (derivative) @ $66.28 | EDGAR |
| 2025-12-16 | 4 | CABOT CORP (CBT) | Grant/award (A): 1.91 (derivative) @ $68.34 | EDGAR |
| 2025-12-05 | 4 | CABOT CORP (CBT) | Grant/award (A): 3,486 @ $0 · Grant/award (A): 12,767 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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