Item 1.01 Entry into a Material Definitive Agreement

On August 3, 2022, Ecovyst Inc. (the "Company") entered into an Underwriting Agreement (the "Underwriting Agreement") by and among the Company, Goldman Sachs & Co. LLC, Deutsche Bank Securities Inc. and Credit Suisse Securities (USA) LLC, as representatives of the several underwriters listed on Schedule II thereto (collectively, the "Underwriters"), and the selling stockholders listed on Schedule I thereto (the "Selling Stockholders"), relating to the underwritten offering of 13,000,000 shares (the "Shares"), including the Underwriters' 30 day option to purchase up to an additional 1,950,000 shares from the Selling Stockholders, of the Company's common stock, par value $0.01 per share (the "Offering"). All of the Shares are being sold by the Selling Stockholders. The Underwriters have agreed to purchase the Shares from the Selling Stockholders pursuant to the Underwriting Agreement at a price of $8.35625 per share. In addition, pursuant to the Underwriting Agreement, the Company has agreed to purchase from the Underwriters 6,500,000 Shares being sold by the Selling Stockholders to the Underwriters, at a price per share equal to the price being paid by the Underwriters to the Selling Stockholders, resulting in an aggregate purchase price of $54,315,625.00 (the "Share Repurchase"). The Company intends to fund the Share Repurchase with cash on hand and cash generated from operations.

The Offering is being made only by means of a prospectus. An automatic shelf registration statement (including a prospectus) relating to the offering of common stock was filed with the Securities and Exchange Commission (the "SEC") on April 26, 2021 and became effective upon filing (File No. 333-255514) (the "Registration Statement"). A prospectus supplement relating to the Offering was filed with the SEC on August 3, 2022. The closing of the Offering is expected to take place on or about August 8, 2022, subject to the satisfaction of customary closing conditions. A copy of the Underwriting Agreement is filed as Exhibit 1.1 to this Current Report on Form 8-K.

Item 8.01 Other Events

Ropes & Gray LLP, counsel to the Company, has issued an opinion to the Company, dated August 5, 2022, regarding the Shares to be sold in the Offering. A copy of the opinion is filed as Exhibit 5.1 to this Current Report on Form 8-K. Certain information relating to Part II, Item 14 "Other Expenses of Issuance and Distribution" of the Registration Statement is filed as Exhibit 99.1 to this Current Report on Form 8-K.

Item 9.01 Financial Statements and Exhibits





(d)   Exhibits.



Exhibit No.       Description

1.1                 Underwriting Agreement, dated August 3, 2022, by and among the
                  Company, the Underwriters and the Selling Stockholders.

5.1                 Opinion of Ropes & Gray LLP

23.1                Consent of Ropes & Gray LLP (included in Exhibit 5.1 above)

99.1                Information relating to Part II, Item 14 "Other Expenses of
                  Issuance and Distribution" of the Registration Statement.

104               Cover Page Interactive Data File (embedded within the Inline XBRL
                  document).

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