Exhibit 99.1 NEWS RELEASE Drilling Tools International Corp. Reports 2024 First Quarter Results Company Reaffirms 2024 Outlook HOUSTON — May 9, 2024 — Drilling Tools International Corp., (NASDAQ: DTI) (“DTI” or the “Company”), a global oilfield services company that designs, engineers, manufactures and provides a differentiated, rental-focused offering of tools for use in onshore and offshore horizontal and directional drilling operations, as well as other cutting-edge solutions across the well life cycle, ...