• Mammoth Energy director Arthur H. Amron bought 5,500 common shares in open-market purchases at weighted-average prices of $3.24 and $3.25.
• Amron’s direct holding rose to 62,635 shares following the transactions.

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. Mammoth Energy Services 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: 0001628280-26-038861), on May 28, 2026, and is solely responsible for the information contained therein.