Derivative exercise or conversion — not an open-market buy.
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
Aug 28, 2026
Reporting period
Not applicable
Filed with the SEC
Aug 31, 2026
CEOOption exercise
Context
Classification
option exercise
Code M — exercise or conversion of a derivative security
Planned / mechanical clue
Footnote references vesting of compensation awards
Only flagged when a footnote says so; never inferred
Source receipt
Record ID
0001193125-26-377202
Filed / recorded
Aug 31, 2026, 11:00 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
Sean D Keohane
Relationship
Director, Officer
Officer title
President and CEO
Security
Employee Stock Option (Right to Buy)
Table
Derivative (Table II)
Transaction date
Aug 28, 2026
Transaction code
M
Shares / units
134,895
Price per share
$0.00
Acquired / disposed
Disposed (D)
Shares owned after
0
Ownership form
Direct
Amendment
No
Footnotes from the filing
137,674 shares were subject to the option. The option vested over a three year period as follows: 30% on November 9, 2019, 30% on November 9, 2020, and 40% on November 9, 2021.