Cabot CEO awarded 305.563 phantom stock units

Keohane Sean D reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 03/17/2026 - 05:00 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Keohane Sean D reported acquisition or exercise transactions in this Form 4 filing.

Cabot Corp President and CEO Sean D. Keohane received a grant of 305.563 phantom stock units tied to Cabot common stock at a reference price of $69.49 per unit. These units reflect dividends on prior phantom stock under the company’s Supplemental 401(k) Plan and will be settled in shares after his retirement or other termination of employment. Following this grant, he holds a total of 47,491.2811 phantom stock units.

Insider Trade Summary

Grant/Award: 305.563 shares

Grant/Award 1 txn

Insider Keohane Sean D

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Phantom Stock Units	305.563	$69.49	$21K

Holdings After Transaction: Phantom Stock Units — 47,491.2811 contracts (Direct)

Holdings Before and After: Phantom Stock Units, 47,185.7181 to 47,491.2811 contracts (Direct)

Footnotes (2)

1. F1. 1 for 1
2. F2. Represents dividends paid on phantom stock units acquired under the Corporation's Supplemental 401(k) Plan and are to be settled upon the reporting person's retirement or other termination of employment.

FAQ

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What did Cabot Corp (CBT) CEO Sean Keohane report in this Form 4?

Sean Keohane reported receiving 305.563 phantom stock units as a grant. These units were credited as dividends under Cabot’s Supplemental 401(k) Plan and are linked 1-for-1 to Cabot common stock, settling in shares at retirement or employment termination.

How many phantom stock units does the Cabot Corp (CBT) CEO hold after this transaction?

After this transaction, Sean Keohane holds 47,491.2811 phantom stock units. These units mirror Cabot common stock value and are scheduled to be settled in shares when he retires or otherwise ends his employment with the company.

What is the nature of the phantom stock units granted to the Cabot Corp (CBT) CEO?

The phantom stock units are a compensation-related grant, not an open-market purchase. They represent dividend equivalents on existing phantom units under Cabot’s Supplemental 401(k) Plan and convert 1-for-1 into Cabot common stock upon settlement at retirement or termination.

At what reference price were the new Cabot Corp (CBT) phantom stock units credited?

The 305.563 phantom stock units were credited at a reference price of $69.49 per unit. This price is used to calculate the number of units tied to Cabot common stock value, rather than representing cash paid by the executive.

When will the Cabot Corp (CBT) CEO’s phantom stock units be settled into common shares?

The phantom stock units will be settled in Cabot common shares upon Sean Keohane’s retirement or other termination of employment. Until that event, the units track the value of Cabot’s stock and accumulate dividend equivalents under the Supplemental 401(k) Plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED 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 MA 02210

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CABOT CORP [ CBT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/13/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
			Code	V	Amount	(A) or (D)	Price

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Phantom Stock Units	(1)	03/13/2026		A		305.563		(2)	(2)	Common Stock	305.563	$69.49	47,491.2811	D

Explanation of Responses:

1. 1 for 1

2. Represents dividends paid on phantom stock units acquired under the Corporation's Supplemental 401(k) Plan and are to be settled upon the reporting person's retirement or other termination of employment.

	By: Jennifer Lombardi, pursuant to a power of attorney from Sean D. Keohane	03/17/2026
	** Signature of Reporting Person	Date
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.
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