UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 3, 2024

Ecovyst Inc.

	Commission File Number: 001-38221
Delaware		81-3406833
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

300 Lindenwood Drive Malvern, Pennsylvania	19355
(Address of principal executive offices)	(Zip Code)

(484) 617-1200

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading symbol	Name of each exchange on which registered
Common stock, par value $0.01 per share	ECVT	New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On May 3, 2024, Robert Coxon notified Ecovyst Inc. (the “Company”) that he would be resigning from the Company’s Board of Directors (the “Board”), effective 5:00 p.m. Eastern Time on May 8, 2024. Mr. Coxon has served on the Board since 2007. Mr. Coxon’s resignation was due to personal health reasons and was not as a result of or caused by any disagreement with the Company. The Board expects as of the effectiveness of Mr. Coxon’s resignation to decrease the size of the Board to eight (8) members.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: May 6, 2024	Ecovyst Inc.
	By:	/s/ Joseph S. Koscinski
	Name:	Joseph S. Koscinski
	Title:	Vice President, Chief Administrative Officer, General Counsel and Secretary