• Arq CFO Shimon Steinmetz reported open-market purchases totaling 16,270 common shares.
• Direct holdings rose to 350,523 shares, bought at a weighted-average price of USD 2.22.
• An additional 8,770 shares were reported as indirectly held through Steinmetz Advisory Group LLC at USD 2.23.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Arq Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001515156-26-000125), on September 08, 2026, and is solely responsible for the information contained therein.