Cabot Corp (CBT) director Vanlancker reports 2,298-share deferral

Rhea-AI Filing Summary

Cabot Corporation director Thierry Vanlancker reported an acquisition of company common stock through a compensation-related deferral. On January 8, 2026, he acquired 2,298 shares of Cabot common stock at a stated price of $0 per share, classified as an acquisition transaction. After this transaction, he beneficially owned 4,902 Cabot shares in total, held directly.

According to the footnote, these shares have been deferred under Cabot's Non-Employee Directors' Deferral Plan, meaning they arise from the director compensation program rather than an open‑market purchase. The filing indicates this report is made by a single reporting person in his capacity as a director of Cabot Corporation.

Insider Trade Summary

Net Buyer: 2,298 shares

Net Buy 1 txn

Insider Vanlancker Thierry FJ

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,298	$0.00	$0.00

Holdings After Transaction: Common Stock — 4,902 shares (Direct)

Footnotes (1)

1. F1. The shares have been deferred pursuant to Cabot's Non-Employee Directors' Deferral Plan.

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FAQ

What insider transaction did Cabot Corp (CBT) disclose for Thierry Vanlancker?

Cabot Corp disclosed that director Thierry Vanlancker acquired 2,298 shares of Cabot common stock on January 8, 2026, reported as an acquisition transaction.

How many Cabot Corp (CBT) shares does Thierry Vanlancker own after this transaction?

Following the reported transaction, Thierry Vanlancker beneficially owns 4,902 shares of Cabot common stock, held in direct ownership form.

What was the price for the shares acquired by the Cabot Corp (CBT) director?

The 2,298 Cabot common shares acquired by director Thierry Vanlancker on January 8, 2026 were reported at a stated price of $0 per share.

How were the new Cabot Corp (CBT) shares obtained by Thierry Vanlancker?

The footnote explains that the 2,298 shares were deferred under Cabot's Non-Employee Directors' Deferral Plan, indicating they stem from director compensation deferrals rather than market purchases.

What is Thierry Vanlancker’s role at Cabot Corp (CBT) according to this filing?

The filing identifies Thierry Vanlancker as a director of Cabot Corporation and does not list him as an officer or a 10% owner.

Is the reported Cabot Corp (CBT) transaction a direct or indirect holding for Thierry Vanlancker?

The report classifies the holdings as direct ownership (D), with 4,902 Cabot shares beneficially owned directly after the transaction.

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^*

Vanlancker Thierry FJ

(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)
01/08/2026

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
Common Stock	01/08/2026		A		2,298(1)	A	$0	4,902	D

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

Explanation of Responses:

1. The shares have been deferred pursuant to Cabot's Non-Employee Directors' Deferral Plan.

	By: Jennifer Lombardi, pursuant to a power of attorney from Thierry Vanlancker	01/12/2026
	** 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.