Ecovyst Inc.

Ecovyst Inc. is a leading integrated provider of virgin and regenerated sulfuric acid products and services. The company was incorporated in Delaware on August 7, 2015, and its common stock is listed on the New York Stock Exchange under the ticker "ECVT". Ecovyst traces its origins to the late 1800s with its first sulfuric acid plant and the beginning of its oldest customer relationship. The company estimates it holds a number one or number two supply share position for products and services that generated more than 95% of its 2025 sales. Ecovyst's footprint and efficient network of strategically located manufacturing and regeneration facilities are key to serving its customers. Its products and services, while typically a small portion of customers' overall end-product costs, are critical to their processes. On December 31, 2025, Ecovyst completed the sale of its Advanced Materials & Catalysts segment, which included its investment in Zeolyst International and Zeolyst C.V. (the "Zeolyst Joint Venture"), to Technip Energies N.V. for a purchase price of $556.0 million, subject to certain adjustments. $465.0 million of the net cash proceeds were used to partially repay the Senior Secured Term Loan Facility due June 2031. The results of operations, financial condition, and cash flows for the Advanced Materials & Catalysts business are presented as discontinued operations.