Ecovyst stockholders approve board declassification, elect directors, set say-on-pay to annual

On May 8, 2024, the stockholders of Ecovyst Inc. (the “Company”) approved an amendment (the “Charter Amendment”) to the Company’s Second Restated Certificate of Incorporation, as amended and corrected (the “Charter”) to phase-out the Company’s classified Board of Directors (the “Board”) over a two-year period starting with the election of directors in 2025 and to permit stockholders to remove directors with or without cause beginning in 2027 when the Board is declassified.

Proposal One : Each of the three Class I director nominees was elected to serve on the Company’s Board for a term of three years. The results of the vote were as follows: Nominee Votes For Votes Withheld Broker Non-Votes Anna C. Catalano 100,037,275 3,678,306 7,281,565 Sarah Lorance 102,257,190 1,458,391 7,281,565 Donald Althoff 102,208,244 1,507,337 7,281,565

Proposal Three : The stockholders voted, on an advisory basis, to hold a say-on-pay proposal each year. The results of the advisory vote were as follows: 1 Year 2 Years 3 Years Abstain Broker Non-Votes 97,556,771 49,426 6,105,501 3,883 7,281,565

Proposal Two : The stockholders approved, on an advisory basis, the compensation paid by the Company to its named executive officers (the “say-on-pay proposal”). The results of the advisory vote were as follows: For Against Abstain Broker Non-Votes 98,135,133 5,568,322 12,126 7,281,565

Proposal Four : The appointment of PricewaterhouseCoopers LLP as the independent registered public accounting firm of the Company for the fiscal year ending December 31, 2024 was ratified. The results of the vote were as follows: For Against Abstain 110,844,000 101,053 52,093

Proposal Five : The amendment of the Charter, to declassify the Board of the Company, was approved. The results of the vote were as follows: For Against Abstain Broker Non-Votes 103,198,010 513,962 3,609 7,281,565