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Ecovyst Inc.

For the period ended Dec 31, 2025. Filed Feb 27, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 27, 2026

ECVT$10.65-1.0%Stored close · as of Nov 10, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

Item 9B. Other Information

Trading Arrangements

During the quarter ended December 31, 2025, none of the Company’s directors or executive officers adopted orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each item is defined in Item 408(a) of Regulation S-K.

Share Repurchase Program Modification

On October 30, 2025, our Board amended our Stock Repurchase Program to remove the limitation that all repurchases must be made within the four-year period from the date of original approval on April 27, 2022.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.