Carol S. Eicher Insider Transaction Report

This filing details a transaction by Carol S. Eicher, a director at Arq, Inc. (ARQ). On March 13, 2026, Ms. Eicher acquired 77,500 shares of Arq, Inc. Common Stock through a purchase transaction (Code "P"). The weighted average price per share was $1.9485, with individual transaction prices ranging from $1.925 to $1.950. Following this acquisition, Ms. Eicher directly owns 174,010 shares of Arq, Inc. Common Stock. This information is reported on Form 4.