Cabot director granted phantom stock units

DELGROSSO DOUGLAS G reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

DELGROSSO DOUGLAS G reported acquisition or exercise transactions in this Form 4 filing.

CABOT CORP director Douglas G. DelGrosso received an additional 33.0535 phantom stock units credited on March 13, 2026. These units were valued at $69.4900 per unit and increase his deferred phantom stock balance to 5,137.2601 units.

The footnotes explain that the units represent dividends paid on phantom stock units under the Corporation's Non-Employee Director's Deferral Plan. They will be settled on a 1-for-1 basis in Cabot common stock either when he leaves the board or according to his chosen distribution schedule, whichever happens first.

Insider Trade Summary

Grant/Award: 33.0535 shares

Grant/Award 1 txn

Insider DELGROSSO DOUGLAS G

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Phantom Stock Units	33.0535	$69.49	$2K

Holdings After Transaction: Phantom Stock Units — 5,137.2601 contracts (Direct)

Footnotes (2)

1. F1. 1 for 1
2. F2. Represents dividends paid on phantom stock units acquired under the Corporation's Non-Employee Director's Deferral Plan and will be settled either upon the reporting person's termination of service as a director or in accordance with the distribution election of the reporting person, whichever first occurs.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did CABOT CORP (CBT) report for Douglas G. DelGrosso?

CABOT CORP reported that director Douglas G. DelGrosso acquired 33.0535 phantom stock units. These units were credited as dividend equivalents under the Non-Employee Director's Deferral Plan and add to his deferred compensation balance linked to Cabot common stock performance.

What are phantom stock units in CABOT CORP's Form 4 for CBT?

Phantom stock units are bookkeeping entries tied to CABOT CORP's common stock value. In this filing, they represent dividend payments on previously deferred director compensation and will be settled in Cabot shares on a 1-for-1 basis at a future distribution event.

How many CABOT CORP phantom stock units does Douglas G. DelGrosso hold after this Form 4?

After the reported transaction, Douglas G. DelGrosso holds 5,137.2601 phantom stock units. This total reflects the new 33.0535 units credited as dividend equivalents on his prior phantom stock balance under the Non-Employee Director's Deferral Plan.

When will Douglas G. DelGrosso’s CABOT CORP phantom stock units be settled?

The phantom stock units will be settled either when Douglas G. DelGrosso’s service as a CABOT CORP director ends, or according to his elected distribution schedule, whichever occurs first. Settlement will be on a 1-for-1 basis in Cabot common stock.

Is the CABOT CORP (CBT) Form 4 a market purchase or sale of shares?

No, this Form 4 does not show a market purchase or sale of CABOT CORP shares. It records a grant of 33.0535 phantom stock units as dividend equivalents under a director deferral plan, treated as deferred compensation rather than open-market trading.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/17/2026 - 05:00 PM Learn about SEC filing dates

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^*

DELGROSSO DOUGLAS G

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/13/2026

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)	03/13/2026		A		33.0535		(2)	(2)	Common Stock	33.0535	$69.49	5,137.2601	D

Explanation of Responses:

1. 1 for 1

2. Represents dividends paid on phantom stock units acquired under the Corporation's Non-Employee Director's Deferral Plan and will be settled either upon the reporting person's termination of service as a director or in accordance with the distribution election of the reporting person, whichever first occurs.

	By: Jennifer Lombardi, pursuant to a power of attorney from Doug G. Del Grosso	03/17/2026
	** 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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