Steinmetz Shimon Officer Transaction

Shimon Steinmetz, the Chief Financial Officer of Arq, Inc., reported the acquisition of 1098 shares of common stock on September 8, 2026, at a weighted average price of $2.3396. These shares were purchased in multiple transactions at prices ranging from $2.3374 to $2.3415. Following this transaction, Mr. Steinmetz directly owns 353,023 shares. Additionally, Steinmetz Advisory Group LLC, an entity for which Mr. Steinmetz is the ultimate control person, acquired 1874 shares of common stock at a weighted average price of $2.3393 on the same date. These shares are indirectly beneficially owned by Mr. Steinmetz, bringing his indirect ownership in Steinmetz Advisory Group to 15,000 shares. Mr. Steinmetz disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.