[Form 4] CABOT CORP Insider Trading Activity

Rhea-AI Filing Summary

Lisa M. Dumont, VP, Controller & CAO of Cabot Corporation (CBT), acquired phantom stock units on 09/11/2025 representing dividends paid on phantom stock units under the company's Supplemental 401(k) Plan. The Form 4 reports these units are to be settled in common stock upon the reporting person's retirement or other termination of employment. The filing shows 547.9886 shares (underlying amount) associated with the reported transaction and lists an attributable price reference of $81.47. The Form was signed by an attorney-in-fact on 09/15/2025.

Insights

Financial Analyst

TL;DR: Routine insider acquisition of phantom stock units from a retirement plan; immaterial to near-term market valuation.

The Form 4 documents a non-cash acquisition of phantom stock units credited as dividends under Cabot's Supplemental 401(k) Plan on 09/11/2025. These units are to be settled in shares upon termination or retirement, so there is no immediate issuance of common stock or cash impact disclosed. The report cites 547.9886 underlying shares and a reference price of $81.47, but does not indicate a change in voting control or an immediate market transaction. For investors, this is an administrative compensation-related entry rather than a market-moving insider trade.

Corporate Governance Expert

TL;DR: Filing reflects standard executive benefit processing; disclosure aligns with Section 16 reporting requirements.

The disclosure explains these phantom units arise from dividends on plan holdings and will be settled upon exit from employment. The Form 4 is properly executed via power of attorney and discloses the reporting person’s officer role. There are no indications of accelerated vesting, related-party transactions, or immediate dispositions. This appears to be a routine compensation settlement mechanism requiring disclosure under Section 16.

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)
09/11/2025

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)	09/11/2025		A		3.0102		(2)	(2)	Common Stock	3.0102	$81.47	547.9886	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	09/15/2025
	** 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 transaction did Lisa M. Dumont report on Form 4 for Cabot Corporation (CBT)?

The Form 4 reports acquisition of phantom stock units on 09/11/2025, representing dividends under the company's Supplemental 401(k) Plan.

How many underlying shares are associated with the reported phantom stock units?

The filing lists 547.9886 underlying shares associated with the reported transaction.

Will the phantom stock units immediately convert to common stock?

No. The filing states the units are to be settled upon the reporting person's retirement or other termination of employment.

Does the Form 4 indicate any sale or open-market transaction?

No. The transaction is recorded as an acquisition of phantom stock units (compensation/plan-related), not an open-market sale.

Who signed the Form 4 filing for Lisa M. Dumont?

The filing was signed by Jennifer Lombardi pursuant to a power of attorney from Lisa M. Dumont on 09/15/2025.