[Form 4] CABOT CORP Insider Trading Activity

Rhea-AI Filing Summary

Matthew Forster Wood, Senior Vice President of Cabot Corporation (CBT), reported a non‑derivative acquisition tied to phantom stock units on 09/11/2025. The filing shows 1.4119 phantom stock units were acquired at an attributable value of $81.47 each, increasing his beneficial ownership to 257.0493 shares of common stock. The filing explains these units represent dividends paid on phantom stock under the company’s Supplemental 401(k) Plan and will be settled when the reporting person retires or leaves employment. The Form 4 was signed by Jennifer Lombardi under power of attorney on 09/15/2025.

Positive

• Retention alignment: Units originate from the Supplemental 401(k) Plan, supporting long‑term alignment with shareholders
• Transparency: Officer timely reported the acquisition and provided explanation of the phantom unit source and settlement terms

Negative

• Limited economic immediacy: Phantom units will only settle upon retirement or termination, providing no near‑term change to voting or cash ownership

Insights

Corporate Governance Expert

TL;DR: Minor retention-oriented award; administrative dividend settlement increases reported holdings slightly.

The reported transaction is small and appears to be an administrative settlement of dividend‑credited phantom stock units under the company’s Supplemental 401(k) Plan rather than a discretionary purchase or sale. The incremental 1.4119 units (valued at $81.47 each) and resulting 257.0493 beneficial shares are consistent with routine compensation deferrals and do not indicate an active trading decision by the officer. This is a routine disclosure reflecting deferred compensation accounting and eventual settlement upon termination or retirement.

Compensation & Benefits Analyst

TL;DR: Transaction reflects dividend reinvestment into phantom units under a 401(k) supplemental plan.

The explanation specifies these units were acquired as dividends on phantom stock under the Supplemental 401(k) Plan and will be settled at employment termination or retirement. That mechanism aligns executive long‑term retention incentives. The monetary scale shown (1.4119 units at $81.47) is immaterial relative to typical executive holdings and appears procedural rather than indicative of a change in compensation policy.

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^*

Wood Matthew Forster

(Last) (First) (Middle)

C/O CABOT CORPORATION

TWO SEAPORT LANE

(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)
	Senior Vice President

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		1.4119		(2)	(2)	Common Stock	1.4119	$81.47	257.0493	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 Matthew Wood	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 did Matthew Forster Wood disclose on the Form 4 for CBT?

He reported acquiring 1.4119 phantom stock units on 09/11/2025, valued at $81.47 each, raising his beneficial ownership to 257.0493 shares.

Why were phantom stock units acquired according to the filing?

The filing states they represent dividends paid on phantom stock units under the Corporation's Supplemental 401(k) Plan and will be settled upon retirement or termination.

Does this Form 4 indicate a purchase of actual shares of CBT?

No. The transaction involves phantom stock units that track common stock value; settlement into actual shares or cash occurs at termination or retirement per the filing.

When was the Form 4 signed and who signed it?

The Form 4 was signed by Jennifer Lombardi pursuant to a power of attorney from Matthew Wood on 09/15/2025.

What is the reporting person's role at Cabot Corporation?

The form lists Matthew Forster Wood as a Senior Vice President and indicates he is an officer of the issuer.