Press Release: CCMP Capital Advisors : Ecovyst Announces Upsize and Pricing of Secondary Offering of 13,000,000 Shares of Common Stock by Selling Stockholders and Repurchase of Common Stock

MALVERN, Pa.--(BUSINESS WIRE)--Ecovyst Inc. (NYSE: ECVT) (the "Company") today announced the upsize and pricing of the previously announced underwritten public offering (the "Offering") by funds affiliated with CCMP Capital Advisors, LP (the "Selling Stockholders"). The size of the Offering increased from the previously announced 12,000,000 shares to an aggregate of 13,000,000 shares of the Company's common stock at a price to the public of $8.75 per share. The Offering is expected to close on