William F. Masterson III

Insider Reports History

Location
Boston, MA
Signature
By: Mazda Cintron, pursuant to a power of attorney from William F. Masterson, III
All insider transactions
Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by William F. Masterson III:

Company Role Class Num Shares Value Price $ Report Date Ownership
CABOT CORP Senior Vice President Common Stock 7,210 $435,988 $60.47 03 Dec 2025 Direct
CABOT CORP Senior Vice President Phantom Stock Units 520 $34,493 $66.28 31 Dec 2025 Direct
CABOT CORP Senior Vice President Employee Stock Option (Right to Buy) 12,767 03 Dec 2025 Direct

Insider Reports Filed by William F. Masterson III

Symbol Company Period Transactions Value $ Form Type Role Filing Time
CBT CABOT CORP 31 Dec 2025 1 +$15,151 4 Senior Vice President 05 Jan 2026, 15:59
CBT CABOT CORP 12 Dec 2025 1 +$130 4 Senior Vice President 16 Dec 2025, 17:00
CBT CABOT CORP 03 Dec 2025 2 $0 4 Senior Vice President 05 Dec 2025, 17:30
CBT CABOT CORP 21 Nov 2025 0 $0 3 Senior Vice President 02 Dec 2025, 17:00