Matador CFO buys 2,500 shares at $56.64 each

Matador Resources Co (MTDR) reported an open-market purchase by EVP and CFO Christopher P. Calvert.

Rhea-AI Filing Summary

Matador Resources Co (MTDR) reported an open-market purchase by EVP and CFO Christopher P. Calvert. On August 27, 2026, an entity representing his 401(k) account bought 2,500 shares of common stock at $56.64 per share, bringing that indirect 401(k) position to 44,000 shares. Separately, he holds 85,624 shares directly, which include 3,334 restricted shares granted on February 14, 2024 that vest on the third anniversary of grant, as well as shares acquired through Matador’s Employee Stock Purchase Plan. The filing indicates these transactions were not made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Buyer: 2,500 shares

Net Buy 2 txns

Insider Calvert Christopher P

Role EVP and CFO

Bought 2,500 shs ($142K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	2,500	$56.64	$142K
holding	Common Stock F1, F2	--	--	--

Holdings After Transaction: Common Stock — 44,000 shares (Indirect, Represents shares held of record by the reporting person's 401(k) account); Common Stock — 85,624 shares (Direct)

Footnotes (2)

1. F1. Includes 3,334 shares of restricted stock granted to the reporting person on February 14, 2024 that vest on the third anniversary of the date of grant.
2. F2. Includes shares acquired pursuant to the Issuer's Employee Stock Purchase Plan. Such acquisitions are exempt under Rule 16b-3.

Key Figures

Shares purchased: 2,500 shares of Common Stock Purchase price: $56.64 per share Indirect holdings after transaction: 44,000 shares of Common Stock +2 more

5 metrics

Shares purchased 2,500 shares of Common Stock Open-market purchase on August 27, 2026

Purchase price $56.64 per share Price paid for 2,500 shares on August 27, 2026

Indirect holdings after transaction 44,000 shares of Common Stock Shares held in reporting person’s 401(k) account after purchase

Direct holdings after transaction 85,624 shares of Common Stock Directly held MTDR shares, including restricted and ESPP shares

Restricted stock grant 3,334 shares of restricted stock Granted February 14, 2024; vest on third anniversary of grant

Key Terms

restricted stock, Employee Stock Purchase Plan, Rule 16b-3, indirect ownership, +1 more

5 terms

restricted stock financial

"Includes 3,334 shares of restricted stock granted to the reporting person"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Employee Stock Purchase Plan financial

"Includes shares acquired pursuant to the Issuer's Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Rule 16b-3 regulatory

"Such acquisitions are exempt under Rule 16b-3"

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

indirect ownership financial

"ownership_type": "indirect""

direct ownership financial

"ownership_type": "direct""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did MTDR EVP and CFO Christopher P. Calvert report?

He reported a purchase of 2,500 MTDR common shares on August 27, 2026 at $56.64 per share through his 401(k) account, increasing that indirect position to 44,000 shares.

How many Matador Resources (MTDR) shares does Christopher P. Calvert now hold indirectly?

Following the reported transaction, an account representing Christopher P. Calvert’s 401(k) holds 44,000 MTDR shares of common stock.

How many Matador Resources (MTDR) shares does Christopher P. Calvert hold directly after this filing?

He holds 85,624 MTDR shares directly. This direct position includes 3,334 restricted shares granted on February 14, 2024 and shares acquired through the Employee Stock Purchase Plan.

Were Christopher P. Calvert’s MTDR trades made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not selected, indicating the reported transactions were not made pursuant to a Rule 10b5-1 trading plan.

What are the key terms of Christopher P. Calvert’s restricted MTDR shares?

He has 3,334 restricted MTDR shares granted on February 14, 2024. These shares vest on the third anniversary of the grant date, assuming applicable conditions are met.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/31/2026 - 07:36 AM EDT Accepted by SEC EDGAR 08/31/2026 - 07:35 AM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Calvert Christopher P

(Last) (First) (Middle)

5400 LBJ FREEWAY

SUITE 1500

(Street)

DALLAS TEXAS 75240

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/27/2026

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

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

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

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	08/27/2026		P		2,500	A	$56.64	44,000	I	Represents shares held of record by the reporting person's 401(k) account
Common Stock								85,624(1)(2)	D

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

Explanation of Responses:

1. Includes 3,334 shares of restricted stock granted to the reporting person on February 14, 2024 that vest on the third anniversary of the date of grant.

2. Includes shares acquired pursuant to the Issuer's Employee Stock Purchase Plan. Such acquisitions are exempt under Rule 16b-3.

Remarks:

	/s/ Christopher P. Calvert, by Derek E. Gabriel as attorney-in-fact	08/31/2026
	** 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 4 (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.
* Form 4: SEC 1474 (03-26)