STOCK TITAN

Cabot CEO exercises 134,895 options, sells shares

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

CABOT CORP (CBT) reported insider transactions by President and CEO Sean D. Keohane. On 2026-08-28, he exercised an Employee Stock Option to acquire 134,895 shares of common stock at an exercise price of $50.00 per share, eliminating his holdings in that option grant. The same day, he sold 134,895 shares of CABOT CORP common stock at a price of $85.00 per share. Following these transactions, he also reported 14,263.7411 shares of common stock held indirectly through the trustee for the corporation's 401(k) plan.

Positive

  • None.

Negative

  • None.
Insider Keohane Sean D
Role President and CEO
Sold 134,895 shs ($11.47M)
Approx. gross sale proceeds $11.47M
Approx. exercise cost $6.74M
Approx. pre-tax spread $4.72M
Type Security Shares Price Value
Exercise Employee Stock Option (Right to Buy) F1 134,895 $0.00 $0.00
Exercise Common Stock 134,895 $50.00 $6.74M
Sale Common Stock 134,895 $85.00 $11.47M
holding Common Stock -- -- --
Holdings After Transaction: Employee Stock Option (Right to Buy) — 0 shares (Direct); Common Stock — 404,134 shares (Direct); Common Stock — 14,263.7411 shares (Indirect, Through the Trustee for the Corporation's 401(k) Plan)
Footnotes (1)
  1. F1. 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.
Options exercised (shares) 134,895 shares Employee Stock Option (Right to Buy) exercised on 2026-08-28
Option exercise price $50.00 per share Exercise price for Employee Stock Option converted into common stock
Shares sold 134,895 shares Common stock sale on 2026-08-28 following option exercise
Sale price $85.00 per share Price received per share for common stock sold on 2026-08-28
Indirect 401(k) holdings 14,263.7411 shares Common stock held indirectly through the trustee for the corporation's 401(k) plan after transactions
Option shares following transaction 0 shares Total shares of the reported Employee Stock Option after the 2026-08-28 exercise
Original option grant size 137,674 shares Footnote states shares subject to the option that vested over three years
Employee Stock Option (Right to Buy) financial
"security_title: "Employee Stock Option (Right to Buy)""
Exercise or conversion of derivative security financial
"transaction_code_description: "Exercise or conversion of derivative security""
indirect ownership financial
"ownership_type: "indirect" with nature "Through the Trustee for the Corporation's 401(k) Plan""
401(k) Plan financial
"nature_of_ownership: "Through the Trustee for the Corporation's 401(k) Plan""
A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.
Rule 10b5-1 regulatory
"aff_10b5_one field indicates Rule 10b5-1 plan status"
Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What insider transaction did CABOT CORP (CBT) report for Sean D. Keohane?

Sean D. Keohane, President and CEO of CABOT CORP, exercised options for 134,895 shares of common stock at $50.00 per share and sold 134,895 shares at $85.00 per share on 2026-08-28.

At what prices did Sean D. Keohane exercise and sell CABOT CORP (CBT) shares?

He exercised an employee stock option at an exercise price of $50.00 per share and sold the resulting 134,895 shares of CABOT CORP common stock at $85.00 per share on 2026-08-28.

How many CABOT CORP (CBT) options did Sean D. Keohane exercise in this Form 4?

He exercised 134,895 options, each convertible into one share of CABOT CORP common stock, at an exercise price of $50.00 per share, resulting in the same number of common shares acquired before sale.

Did Sean D. Keohane retain any indirect holdings of CABOT CORP (CBT) after the reported transactions?

Yes. After the reported transactions, he held 14,263.7411 shares of CABOT CORP common stock indirectly through the trustee for the corporation's 401(k) plan.

Were any CABOT CORP (CBT) derivative securities remaining from the exercised option grant?

The Form 4 shows the employee stock option position with 0 shares following the exercise of 134,895 options, indicating no remaining shares reported for that option grant.

Was the CABOT CORP (CBT) Form 4 transaction under a Rule 10b5-1 trading plan?

No. The Rule 10b5-1 checkbox is shown as false, indicating the transactions were not affirmed as being made under a Rule 10b5-1 trading plan in this filing.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Keohane Sean D

(Last)(First)(Middle)
C/O CABOT CORPORATION
TWO SEAPORT LANE, SUITE 1400

(Street)
BOSTON MASSACHUSETTS 02210

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
CABOT CORP [ CBT ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
President and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/28/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock08/28/2026M134,895A$50539,029D
Common Stock08/28/2026S134,895D$85404,134D
Common Stock14,263.7411IThrough the Trustee for the Corporation's 401(k) Plan
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Employee Stock Option (Right to Buy)$5008/28/2026M134,895 (1)11/08/2028Common Stock134,895$0.000D
Explanation of Responses:
1. 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.
By: Jennifer M. Lombardi, pursuant to a power of attorney from Sean D. Keohane08/31/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)