Drilling Tools International (NYSE: DTI) director updates indirect holdings

Rhea-AI Filing Summary

Drilling Tools International Corp. director John D. Furst reported changes in his indirect ownership of company stock as of December 10, 2025. A trust for which he serves as trustee, JDF Long Term Trust, received 32,606 shares of common stock at a stated price of $0, described as a pro rata distribution from HHEP Directional, L.P. to its limited partners for no consideration. After this, the trust held 177,072 shares of Drilling Tools International common stock indirectly for his benefit.

The filing also shows 118,252 shares of common stock indirectly held through Oak Stream Investors II, Ltd., for which Furst disclaims beneficial ownership beyond his pecuniary interest. On the derivative side, he reports restricted stock units that each represent one share of common stock and vest 100% on May 13, 2026, as well as fully vested stock options originally received in exchange for options in Drilling Tools International Holdings, Inc. connected to the company’s prior business combination.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

FURST JACK D

(Last) (First) (Middle)

10370 RICHMOND AVENUE, SUITE 1000

(Street)

HOUSTON TX 75042

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Drilling Tools International Corp [ DTI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/10/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/10/2025		J(1)		32,606	A	$0	177,072	I	by JDF Long Term Trust(2)
Common Stock								32,322	D
Common Stock								118,252	I	by Oak Stream Investors II, Ltd.(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(4)							(4)	(4)	Common Stock	(4)		28,626	D
Stock Option (right to buy)	(5)							(5)	(5)	Common Stock	(5)		57,059(5)	D

Explanation of Responses:

1. 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.

2. 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.

3. 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.

4. 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.

5. 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 D. Furst	12/17/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did DTI director John D. Furst report?

John D. Furst reported that JDF Long Term Trust, for which he is trustee, received 32,606 shares of Drilling Tools International Corp. (DTI) common stock on December 10, 2025 through a pro rata distribution from HHEP Directional, L.P. for no consideration.

How many DTI shares does John D. Furst indirectly own after the reported transaction?

After the reported transaction, JDF Long Term Trust held 177,072 shares of DTI common stock indirectly for John D. Furst, and 118,252 shares were indirectly held through Oak Stream Investors II, Ltd., where he disclaims beneficial ownership beyond his pecuniary interest.

What is the nature of the 32,606 DTI shares received by JDF Long Term Trust?

The 32,606 DTI shares received by JDF Long Term Trust were issued as part of HHEP Directional, L.P.’s pro rata distribution of shares to its limited partners for no consideration, according to the explanation section.

What restricted stock units related to DTI does John D. Furst hold?

Each reported restricted stock unit represents a contingent right to receive one share of Drilling Tools International common stock. These restricted stock units vest 100% on May 13, 2026, the one-year anniversary of the grant date.

What stock options in DTI does John D. Furst report on this Form 4?

The filing notes that all shares of common stock subject to stock options held by John D. Furst are vested. These options were received in exchange for options to purchase 250,000 shares of Drilling Tools International Holdings, Inc. common stock at $0.85 per share in connection with the company’s business combination with Legacy DTI.

Does John D. Furst claim full beneficial ownership of DTI shares held by Oak Stream Investors II, Ltd.?

No. The filing states that John D. Furst disclaims beneficial ownership of any DTI common shares held by Oak Stream Investors II, Ltd. other than his pecuniary interest in those shares.