[Form 3] MATADOR RESOURCES COMPANY Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

William D. Lambert, the newly appointed EVP and CFO of Matador Resources (MTDR), has filed an initial Statement of Beneficial Ownership (Form 3) following his appointment on June 11, 2025.

Key ownership details:

• Direct Ownership: 10,000 shares of restricted stock granted on May 5, 2025, vesting equally over three years
• Indirect Ownership: 500 shares held in his Individual Retirement Account

The restricted stock grant demonstrates the company's long-term incentive structure for executive compensation, with vesting scheduled in equal annual installments on the first, second, and third anniversaries of the grant date. The filing was submitted through an attorney-in-fact, Cale L. Curtin, on June 23, 2025.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Lambert William D

(Last) (First) (Middle)

5400 LBJ FREEWAY

SUITE 1500

(Street)

DALLAS TX 75240

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
06/11/2025

3. Issuer Name and Ticker or Trading Symbol
Matador Resources Co [ MTDR ]

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	10,000(1)	D
Common Stock	500	I	Represents shares held of record by the reporting person's Individual Retirement Account

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes 10,000 shares of restricted stock granted to the reporting person on May 5, 2025 that vest in equal annual installments on the first, second and third anniversaries of the date of grant.

Remarks:

	/s/ William D. Lambert, by Cale L. Curtin as attorney-in-fact	06/23/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

Who is the new EVP and CFO of MTDR (Matador Resources)?

William D. Lambert is the new EVP and CFO of Matador Resources Company (MTDR), as disclosed in the Form 3 filing dated June 28, 2025.

How many shares of MTDR stock does William Lambert own directly?

William Lambert directly owns 10,000 shares of MTDR common stock, which consists of restricted stock granted on May 5, 2025 that vests in equal annual installments over three years.

What indirect ownership of MTDR stock does William Lambert have?

William Lambert indirectly owns 500 shares of MTDR common stock through his Individual Retirement Account (IRA).

When will William Lambert's MTDR restricted stock vest?

The 10,000 shares of restricted stock granted to Lambert on May 5, 2025 will vest in equal annual installments on the first, second, and third anniversaries of the grant date.

What is William Lambert's business address at MTDR?

William Lambert's business address is 5400 LBJ Freeway, Suite 1500, Dallas, TX 75240.