Compensation award — excluded from discretionary-purchase analysis.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
View the official recordSEC Form 4 — Statement of Changes in Beneficial OwnershipAll the details
Dates, kept separate
Transaction date
Sep 30, 2026
Reporting period
Not applicable
Filed with the SEC
Oct 1, 2026
OfficerGrant / award
Context
Classification
grant award
Code A — grant or award
Planned / mechanical clue
None found in footnotes
Only flagged when a footnote says so; never inferred
Source receipt
Record ID
0001193125-26-410606
Filed / recorded
Oct 1, 2026, 7:49 PM UTC
Added to OQRO
Oct 6, 2026, 7:14 PM UTC
Parser
form4-xml-v2
Data quality
Verified: identifiers matched exactly
Issuer
CABOT CORP
Issuer CIK
16040
Ticker
CBT
Reporting person
William F Iii Masterson
Relationship
Officer
Officer title
Senior Vice President
Security
Phantom Stock Units
Table
Derivative (Table II)
Transaction date
Sep 30, 2026
Transaction code
A
Shares / units
24.1542
Price per share
$76.91
Acquired / disposed
Acquired (A)
Shares owned after
553.8957
Ownership form
Direct
Amendment
No
Footnotes from the filing
1 for 1
The reported phantom stock units were acquired under the Corporation's supplemental 401(k) plan and are to be settled upon the reporting person's retirement or other termination of service.