Cabot Corp (CBT) CEO reports 2,563 phantom stock units under 401(k) plan

Rhea-AI Filing Summary

Cabot Corporation's President and CEO, who is also a director, reported a compensation-related transaction involving derivative securities. On 12/31/2025, the insider acquired 2,562.8468 phantom stock units linked on a 1-for-1 basis to Cabot common stock. The filing shows a reference price of $66.28 per unit and indicates that, after this transaction, the insider beneficially owned 47,185.7181 phantom stock units in total. These units were granted under the company’s supplemental 401(k) plan and are scheduled to be settled in Cabot common stock upon the executive’s retirement or other termination of service, aligning a portion of the CEO’s compensation with long-term shareholder interests.

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

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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)
12/31/2025

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)	12/31/2025		A		2,562.8468		(2)	(2)	Common Stock	2,562.8468	$66.28	47,185.7181	D

Explanation of Responses:

1. 1 for 1

2. 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.

	By: Mazda Cintron, pursuant to a power of attorney from Sean D. Keohane	01/05/2026
	** 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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FAQ

What insider transaction did Cabot Corp (CBT) report in this Form 4?

The President and CEO of Cabot Corp, who is also a director, reported acquiring 2,562.8468 phantom stock units tied to Cabot common stock on 12/31/2025.

What are the terms of the phantom stock units reported for Cabot Corp (CBT)?

The filing explains a 1-for-1 relationship between phantom stock units and Cabot common stock. The units were acquired at a referenced price of $66.28 per unit and are part of the company’s supplemental 401(k) plan.

How many phantom stock units does the Cabot Corp (CBT) CEO now beneficially own?

Following the reported transaction, the CEO beneficially owned a total of 47,185.7181 phantom stock units linked to Cabot common stock, held in direct form according to the filing.

When will the Cabot Corp (CBT) phantom stock units be settled?

The filing states that the reported phantom stock units acquired under the supplemental 401(k) plan are to be settled upon the reporting person’s retirement or other termination of service.

What is the role of the reporting person in Cabot Corp (CBT)?

The reporting person is identified as a Director and an Officer, serving specifically as President and CEO of Cabot Corporation.

Is this Cabot Corp (CBT) Form 4 filed for one or multiple reporting persons?

The document indicates that the Form 4 is filed by one reporting person, not a joint or group filing.