Ecovyst (ECVT) director sells 15,000 shares at $8.4012 avg

Ecovyst (ECVT) Form 4: Director Susan F. Ward sold 15,000 shares of common stock on 11/07/2025 at a weighted average price of $8.4012.

Rhea-AI Filing Summary

Ecovyst (ECVT) Form 4: Director Susan F. Ward sold 15,000 shares of common stock on 11/07/2025 at a weighted average price of $8.4012. The shares were sold in multiple transactions at prices ranging from $8.400 to $8.415. Following the sale, she beneficially owns 78,261 shares, held directly.

Insider Trade Summary

Net Seller: 15,000 shares

Net Sell 1 txn

Insider Ward Susan F

Role Director

Sold 15,000 shs ($126K)

Type	Security	Shares	Price	Value
Sale	Common Stock	15,000	$8.4012	$126K

Holdings After Transaction: Common Stock — 78,261 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.400 to $8.415, inclusive. The reporting person undertakes to provide to Ecovyst Inc., any security holder of Ecovyst Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

FAQ

What did Ecovyst (ECVT) report in this Form 4?

A director, Susan F. Ward, reported the sale of 15,000 shares of common stock.

On what date were the ECVT shares sold?

The transaction occurred on 11/07/2025.

What was the sale price for the ECVT shares?

The weighted average price was $8.4012, with trades ranging from $8.400 to $8.415.

How many Ecovyst shares does the reporting person own after the sale?

She beneficially owns 78,261 shares following the reported transaction.

Is the ownership direct or indirect after the transaction?

The filing lists direct (D) ownership of the remaining shares.

What is the reporting person’s relationship to Ecovyst?

She is a Director of Ecovyst Inc.

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Accepted by SEC EDGAR 11/10/2025 - 04:01 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^*

Ward Susan F

(Last) (First) (Middle)

C/O ECOVYST INC.

600 LEE ROAD, SUITE 200

(Street)

WAYNE PA 19087

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Ecovyst Inc. [ ECVT ]

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)
11/07/2025

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
Common Stock	11/07/2025		S		15,000	D	$8.4012(1)	78,261	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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.400 to $8.415, inclusive. The reporting person undertakes to provide to Ecovyst Inc., any security holder of Ecovyst Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Remarks:

	/s/ Joseph S. Koscinski, as attorney-in-fact for Susan F. Ward	11/10/2025
	** 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.