Jack D. Furst - 10 Dec 2025 Form 4 Insider Report for Drilling Tools International Corp (DTI)

Role: Director
Signature: /s/ John D. Furst
Issuer symbol: DTI
Transactions as of: 10 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 17 Dec 2025, 16:01:05 UTC
Previous filing: 20 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
FURST JACK D	Director	10370 RICHMOND AVENUE, SUITE 1000, HOUSTON	/s/ John D. Furst	17 Dec 2025	0001062103

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	DTI	Common Stock	Other	$0	+32,606	+23%	$0.000000	177,072	10 Dec 2025	by JDF Long Term Trust	F1, F2
holding	DTI	Common Stock						32,322	10 Dec 2025	Direct
holding	DTI	Common Stock						118,252	10 Dec 2025	by Oak Stream Investors II, Ltd.	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	DTI	Restricted Stock Units						28,626	10 Dec 2025	Common Stock			Direct	F4
holding	DTI	Stock Option (right to buy)						57,059	10 Dec 2025	Common Stock			Direct	F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	32,606 shares of Drilling Tools International Corporation's (DTI") common stock received as a result of HHEP Directional, L.P.'s pro rata distribution of shares to its limited partners for no consideration.
F2	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.
F3	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.
F4	Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. The restricted stock units vest 100% on May 13, 2026, the one-year anniversary of the grant date.
F5	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.