X0609 4 2026-05-13 0001884516 Drilling Tools International Corp DTI 0001062103 FURST JACK D false 10370 RICHMOND AVENUE, SUITE 1000 HOUSTON TX 77042 true false false false false Common Stock 2026-05-13 4 M false 28626 0.00 A 60948 D Common Stock 118252 I by Oak Stream Investors II, Ltd. Common Stock 458737 I by JDF Long Term Trust Restricted Stock Units 2026-05-13 4 M false 28626 0 D Common Stock 28626 0 D Restricted Stock Units Common Stock 23438 D Stock Option (right to buy) Common Stock 57059 D The Reporting Person disclaims any beneficial ownership of any shares of common stock held by Oak Stream Investors II, Ltd., other than his pecuniary interest therein. The Reporting Person is the trustee of JDF Long Term Trust ("JDF"). The Reporting Person may be deemed to have voting power and dispositive power over the shares held by JDF. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. The restricted stock units vested 100% on May 13, 2026, the one-year anniversary of the grant date. The restricted stock units vest 100% on April 28, 2027, the one-year anniversary of the grant date. All shares of common stock subject to stock options held by the Reporting Person are vested. The stock options were received in exchange for stock options to purchase 250,000 shares of common stock of Drilling Tools International Holdings, Inc. ("Legacy DTI") for $0.85 per share in connection with the Issuer's business combination with Legacy DTI. /s/ John Niedzwiecki, as Attorney-in-fact 2026-05-13