Cabot CEO receives 83.7 phantom stock units

CABOT CORP President and CEO Sean D. Keohane reported a grant of 83.6823 phantom stock units.

Rhea-AI Filing Summary

CABOT CORP President and CEO Sean D. Keohane reported a grant of 83.6823 phantom stock units. These units were awarded as a derivative security tied 1-for-1 to Cabot common stock at a reference price of $90.82 per unit.

Following this compensation-related grant, Keohane holds a total of 47,830.9773 phantom stock units directly. According to the disclosure, these phantom stock units were acquired under the company’s supplemental 401(k) plan and will be settled in connection with his retirement or other termination of service.

Insider Trade Summary

Grant/Award: 83.6823 shares

Grant/Award 1 txn

Insider Keohane Sean D

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Phantom Stock Units	83.6823	$90.82	$8K

Holdings After Transaction: Phantom Stock Units — 47,830.9773 contracts (Direct)

Footnotes (2)

1. F1. 1 for 1
2. F2. The reported phantom stock units were acquired under the Corporation's supplemental 401(k) plan and are to be settled upon the reporting person's retirement or other termination of service.

Key Figures

Phantom units granted: 83.6823 units Reference price per unit: $90.82 per unit Total phantom units after grant: 47,830.9773 units +1 more

4 metrics

Phantom units granted 83.6823 units Grant of phantom stock units on June 30, 2026

Reference price per unit $90.82 per unit Transaction price for phantom stock units

Total phantom units after grant 47,830.9773 units Holdings following reported transaction

Conversion ratio 1-for-1 Each phantom unit linked to one common share

Key Terms

Phantom Stock Units, supplemental 401(k) plan, derivative security, Grant, award, or other acquisition

4 terms

Phantom Stock Units financial

"The reported phantom stock units were acquired under the Corporation's supplemental 401(k) plan"

Phantom stock units are company promises that pay a cash or stock-equivalent award tied to the firm’s share price or value growth, but they do not issue actual shares. Think of them as a bonus check that moves with the stock like a mirror rather than handing over an ownership slice. Investors care because these awards can affect a company’s future cash obligations, executive incentives and reported expenses without causing share dilution.

supplemental 401(k) plan financial

"acquired under the Corporation's supplemental 401(k) plan and are to be settled"

derivative security financial

"The reported phantom stock units were acquired as a derivative security linked to common stock"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

FAQ

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

What insider transaction did CABOT CORP (CBT) report for Sean D. Keohane?

CABOT CORP reported that President and CEO Sean D. Keohane received 83.6823 phantom stock units as a compensation grant. These units are derivative securities linked 1-for-1 to Cabot common stock under the company’s supplemental 401(k) plan.

How many phantom stock units does Sean D. Keohane hold after this Form 4 for CABOT CORP (CBT)?

After the reported transaction, Sean D. Keohane holds 47,830.9773 phantom stock units. This total reflects the new 83.6823-unit grant and represents his direct holdings in these compensation-linked derivative units tied to Cabot common stock.

What are the key terms of the phantom stock unit grant reported for CABOT CORP (CBT)?

The filing shows 83.6823 phantom stock units granted at a reference price of $90.82 per unit. The units are linked 1-for-1 to CABOT CORP common stock and were awarded under the company’s supplemental 401(k) plan as a compensation-related acquisition.

When will Sean D. Keohane’s CABOT CORP (CBT) phantom stock units be settled?

The phantom stock units will be settled upon Sean D. Keohane’s retirement or other termination of service. This means the value tied to the derivative units is deferred and generally aligned with his long-term service at CABOT CORP.

Is the CABOT CORP (CBT) Form 4 transaction an open-market buy or a compensation grant?

The transaction is a compensation grant, not an open-market purchase. The Form 4 classifies the code as “A” for a grant, award, or other acquisition of 83.6823 phantom stock units under CABOT CORP’s supplemental 401(k) plan.

What does the 1-for-1 notation mean in CABOT CORP (CBT) phantom stock units?

The 1-for-1 notation means each phantom stock unit corresponds to one share of CABOT CORP common stock. The units track the value of the underlying shares but are settled later, typically in connection with retirement or termination.

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

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Accepted by SEC EDGAR 07/02/2026 - 08:56 AM EDT 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^*

Keohane Sean D

(Last) (First) (Middle)

C/O CABOT CORPORATION

TWO SEAPORT LANE, SUITE 1400

(Street)

BOSTON MASSACHUSETTS 02210

(City) (State) (Zip)

UNITED STATES

(Country)

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
X	Officer (give title below)		Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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)	06/30/2026		A		83.6823		(2)	(2)	Common Stock	83.6823	$90.82	47,830.9773	D

Explanation of Responses:

1. 1 for 1

2. The reported phantom stock units were acquired under the Corporation's supplemental 401(k) plan and are to be settled upon the reporting person's retirement or other termination of service.

	By: Mazda Cintron, pursuant to a power of attorney from Sean D. Keohane	07/01/2026
	** 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.
* Form 4: SEC 1474 (03-26)