Cabot Corp (CBT) executive logs phantom stock units from dividend credits

Rhea-AI Filing Summary

Cabot Corp executive Lisa M. Dumont, VP, Controller & CAO, reported a routine insider transaction involving phantom stock units linked to Cabot common stock. On 12/12/2025, she acquired 3.6084 phantom stock units as dividends under the company’s Supplemental 401(k) Plan at a reference price of $68.34 per share.

Each phantom stock unit represents a 1-for-1 interest in Cabot common stock and is scheduled to be settled in shares upon her retirement or other termination of employment. Following this transaction, Dumont beneficially owns 551.597 phantom stock units, held directly.

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^*

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)
12/12/2025

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)	12/12/2025		A		3.6084		(2)	(2)	Common Stock	3.6084	$68.34	551.597	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 Lisa M. Dumont	12/16/2025
	** 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 for Lisa M. Dumont?

Cabot Corp reported that executive Lisa M. Dumont, VP, Controller & CAO, acquired 3.6084 phantom stock units linked to Cabot common stock on 12/12/2025.

How many Cabot Corp (CBT) phantom stock units does Lisa M. Dumont now hold?

After the reported transaction, Lisa M. Dumont beneficially owns 551.597 phantom stock units, held directly.

What is the price and structure of the Cabot Corp (CBT) phantom stock units?

The transaction reflects 3.6084 phantom stock units credited at a reference price of $68.34 per share, with each unit representing a 1-for-1 interest in Cabot common stock.

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

The phantom stock units represent dividends paid on phantom stock units acquired under Cabot Corp’s Supplemental 401(k) Plan.

When will the Cabot Corp (CBT) phantom stock units for Lisa M. Dumont be settled?

The phantom stock units are to be settled upon Lisa M. Dumont’s retirement or other termination of employment, as disclosed.

What type of security did the Cabot Corp (CBT) insider transaction involve?

The transaction involved phantom stock units, a derivative security whose value is tied 1-for-1 to Cabot common stock, rather than an immediate purchase of common shares.