Matador Resources (MTDR) EVP boosts holdings with 850-share ESPP buy

Rhea-AI Filing Summary

Matador Resources Co executive William Thomas Elsener, EVP of Reservoir Engineering, purchased 850 shares of Matador common stock on 2026-08-10 at $50.94 per share. The shares were acquired through the company’s Employee Stock Purchase Plan, which is exempt under Rule 16b-3, bringing his direct holdings to 114,879 shares.

Insider Trade Summary

Net Buyer: 850 shares

Net Buy 1 txn

Insider Elsener William Thomas

Role EVP, Reservoir Engineering

Bought 850 shs ($43K)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	850	$50.94	$43K

Holdings After Transaction: Common Stock — 114,879 shares (Direct)

Footnotes (1)

1. F1. Includes shares acquired pursuant to the Issuer's Employee Stock Purchase Plan. Such acquisitions are exempt under Rule 16b-3

Key Figures

Shares purchased: 850 shares Purchase price: $50.94 per share Holdings after transaction: 114,879 shares

3 metrics

Shares purchased 850 shares Common stock acquired on 2026-08-10

Purchase price $50.94 per share Price paid for the 850 common shares

Holdings after transaction 114,879 shares Direct ownership following the 2026-08-10 purchase

Key Terms

Employee Stock Purchase Plan, Rule 16b-3, Common Stock

3 terms

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.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

What insider transaction did Matador Resources (MTDR) report for William Thomas Elsener?

Matador Resources reported that EVP, Reservoir Engineering, William Thomas Elsener bought 850 shares of common stock on 2026-08-10 through the company’s Employee Stock Purchase Plan, increasing his direct ownership to 114,879 shares.

At what price did the MTDR executive purchase shares in this Form 4 filing?

The Matador Resources executive purchased 850 shares at $50.94 per share. The transaction involved common stock and was executed via the company’s Employee Stock Purchase Plan, as noted in the Form 4 footnote referencing Rule 16b-3 exemption.

How many Matador Resources (MTDR) shares does William Thomas Elsener hold after the transaction?

Following the reported purchase, William Thomas Elsener directly holds 114,879 shares of Matador Resources common stock. This total includes the 850 shares acquired on 2026-08-10 through the Employee Stock Purchase Plan described in the filing.

Was the MTDR insider purchase made under an Employee Stock Purchase Plan?

Yes. The Form 4 notes that the 850 shares were acquired under Matador Resources’ Employee Stock Purchase Plan. The filing states these acquisitions are exempt under Rule 16b-3, indicating they are part of a company compensation-related program.

Does the Matador Resources (MTDR) Form 4 indicate any share sales by the executive?

No share sales are reported. The Form 4 shows a single purchase transaction of 850 shares of common stock by William Thomas Elsener, increasing his direct holdings to 114,879 shares with no concurrent dispositions disclosed.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/12/2026 - 05:09 PM Accepted by SEC EDGAR 08/12/2026 - 05:08 PM 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^*

Elsener William Thomas

(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, Reservoir Engineering

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/10/2026

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	08/10/2026		P		850	A	$50.94	114,879(1)	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 shares acquired pursuant to the Issuer's Employee Stock Purchase Plan. Such acquisitions are exempt under Rule 16b-3

Remarks:

	/s/ William Thomas Elsener, by Derek E. Gabriel as attorney-in-fact	08/12/2026
	** 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)