Cabot Corp (CBT) officer adds phantom stock units in deferred 401(k) plan

Rhea-AI Filing Summary

Cabot Corporation officer reports phantom stock grant under benefit plan

A Cabot Corporation executive, serving as VP, Controller & CAO, reported the acquisition of derivative equity-based compensation tied to Cabot common stock. On 12/31/2025, the reporting person received 182.3206 phantom stock units, each linked on a 1-for-1 basis to a share of Cabot common stock at a reference price of $66.28. Following this grant, the executive beneficially owned 733.9176 phantom stock units in total.

The phantom stock units were acquired under Cabot’s supplemental 401(k) plan and are scheduled to be settled in Cabot common stock when the executive retires or otherwise terminates service, rather than being settled immediately.

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
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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^*

Dumont Lisa M

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP, Controller & CAO

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		182.3206		(2)	(2)	Common Stock	182.3206	$66.28	733.9176	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 Lisa M. Dumont	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.
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.

FAQ

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

An executive officer of Cabot Corp (CBT), the VP, Controller & CAO, reported acquiring 182.3206 phantom stock units linked to Cabot common stock on 12/31/2025.

What are the terms of the phantom stock units reported by the Cabot (CBT) executive?

The filing states the phantom stock units are 1-for-1 with Cabot common stock, with a reference price of $66.28 per unit and settlement in stock at retirement or other termination of service.

How many Cabot phantom stock units does the insider hold after this transaction?

After the reported transaction, the Cabot executive beneficially owned 733.9176 phantom stock units in total, held in direct form according to the filing.

Under what plan were the Cabot (CBT) phantom stock units granted?

The filing explains that the phantom stock units were acquired under Cabot Corporation's supplemental 401(k) plan as a form of deferred equity-based compensation.

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

The document states the phantom stock units are to be settled upon the reporting person's retirement or other termination of service, rather than immediately.

What role does the reporting person hold at Cabot Corp (CBT)?

The reporting person is identified as an officer of Cabot Corp, with the title VP, Controller & CAO, and filed the Form 4 as an individual reporting person.