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Reporting owner

Masterson William F III

Reporting owner CIK 0002098902 · Senior Vice President

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These transactions appear in filings associated with this reporting owner. Jointly reported quantities and amounts are unallocated; they are not this owner's individual purchases or total holdings. Names and roles reflect the relevant filing, and a reporting owner may be a person or an organization.

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Transaction timeline

Who reported an acquisition, and when the transaction occurred.

Reported acquisitions by transaction dateEach row is a reporting owner. Select a marker to open its transaction details. Jointly reported transactions appear for each associated reporting owner, without dividing quantities or amounts.Masterson William F IIIMasterson William F IIIMasterson William F III · September 30, 2026 · Stock award · Phantom Stock UnitsMasterson William F III · December 31, 2025 · Stock award · Phantom Stock UnitsMasterson William F III · December 12, 2025 · Stock award · Phantom Stock UnitsMasterson William F III · December 3, 2025 · Stock award · Employee Stock Option (Right to Buy)Masterson William F III · December 3, 2025 · Stock award · Common StockDec 3, 2025Sep 30, 2026
PurchaseStock awardGift receivedExercise / conversionConversionOther acquisition

5 dated transactions · 1 of 1 reporting owners shown. Select one owner to focus the chart.

View timeline as a table
Transaction dateCompany / securityReporting ownersAcquisition type
Sep 30, 2026CABOT CORPPhantom Stock UnitsMasterson William F IIIStock award
Dec 31, 2025CABOT CORPPhantom Stock UnitsMasterson William F IIIStock award
Dec 12, 2025CABOT CORPPhantom Stock UnitsMasterson William F IIIStock award
Dec 3, 2025CABOT CORPEmployee Stock Option (Right to Buy)Masterson William F IIIStock award
Dec 3, 2025CABOT CORPCommon StockMasterson William F IIIStock award

Only transactions on this page are shown. Date windows end on the latest transaction date in this sample. Joint filings may appear on more than one row. Sales are not included. Share-price charts use a separate data source.

Transactions in associated filings

Reported insider acquisitions, ordered by filing date, newest first. Currency is shown only when reported.
Filed / transactedCompanyReporting ownersType / securityQuantityPrice / reference valueDetails
Trade: CABOT CORPCBT · company listings
Masterson William F IIISenior Vice President
Stock awardPhantom Stock UnitsDerivative security · Code A24.154276.91Value: 1,857.699522Currency not specifiedView ↗
Trade: CABOT CORPCBT · company listings
Masterson William F IIISenior Vice President
Stock awardPhantom Stock UnitsDerivative security · Code A228.588266.28Value: 15,150.825896Currency not specifiedView ↗
Trade: CABOT CORPCBT · company listings
Masterson William F IIISenior Vice President
Stock awardPhantom Stock UnitsDerivative security · Code A1.909168.34Value: 130.467894Currency not specifiedView ↗
Trade: CABOT CORPCBT · company listings
Masterson William F IIISenior Vice President
Stock awardEmployee Stock Option (Right to Buy)Derivative security · Code A12,7670Value: 0Currency not specifiedView ↗
Trade: CABOT CORPCBT · company listings
Masterson William F IIISenior Vice President
Stock awardCommon StockNon-derivative security · Code A3,4860Value: 0Currency not specifiedView ↗