Christopher P. Calvert - 14 Feb 2026 Form 4 Insider Report for Matador Resources Co (MTDR)

Reporting relationship: EVP and COO
Issuer ticker: MTDR
Reported as of: 14 Feb 2026
Net transaction value: -$112,904
SEC form: 4
Accepted by SEC: 18 Feb 2026, 18:48:03 UTC
Prior SEC filing: 08 Jan 2026
Next SEC filing: 02 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Christopher P. Calvert, by Cale L. Curtin as attorney-in-fact

Key filing fact

Christopher P. Calvert filed Form 4 for Matador Resources Co (MTDR) on 18 Feb 2026.

Key facts

This page summarizes Christopher P. Calvert's Form 4 filing for Matador Resources Co (MTDR).
4 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 18 Feb 2026, 18:48.

Change

Previous filing in this sequence was filed on 08 Jan 2026.
Current net transaction value: -$112,904.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002020286 Primary reporting owner

Calvert Christopher P

Relationship: EVP and COO
Address: 5400 LBJ FREEWAY, SUITE 1500, DALLAS
Signature: /s/ Christopher P. Calvert, by Cale L. Curtin as attorney-in-fact
Signature date: 18 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MTDR transaction

Common Stock

Tax liability

Transaction value: $62,714
Shares: -1,312
Change %: -1.5%
Price: $47.80
Shares after: 86,362
Date: 14 Feb 2026
Ownership: Direct
Footnotes: F1, F2

MTDR transaction

Common Stock

Tax liability

Transaction value: $50,190
Shares: -1,050
Change %: -1.2%
Price: $47.80
Shares after: 85,312
Date: 16 Feb 2026
Ownership: Direct
Footnotes: F3, F4

MTDR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 40,000
Date: 14 Feb 2026
Ownership: Represents shares held of record by the reporting person's 401(k) account

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MTDR transaction Derivative

Phantom Units

Options Exercise

Transaction value: $0
Shares: -6,000
Change %: -33%
Price: $0.000000
Shares after: 12,000
Date: 14 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 6,000
Exercise price
Footnotes: F5, F6

MTDR transaction Derivative

Phantom Units

Award

Transaction value: $0
Shares: +27,000
Change %
Price: $0.000000
Shares after: 27,000
Date: 17 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 27,000
Exercise price
Footnotes: F7, F8

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 8 footnotes

Footnote F1

Represents shares withheld by the Issuer in connection with the reporting person's net share settlement to satisfy tax liability upon the vesting of 3,333 shares of restricted stock that were granted to the reporting person on February 14, 2024. No shares were sold by the reporting person to satisfy this tax liability.

Footnote F2

Includes (i) shares acquired pursuant to the Issuer's Employee Stock Purchase Plan; such acquisitions are exempt under Rule 16b-3; (ii) 3,333 shares of restricted stock granted to the reporting person on February 14, 2024 that vest in equal annual installments on the second and third anniversaries of the date of grant; and (iii) 2,667 shares of restricted stock granted to the reporting person on February 16, 2023 that vest on the third anniversary of the date of grant.

Footnote F3

Represents shares withheld by the Issuer in connection with the reporting person's net share settlement to satisfy tax liability upon the vesting of 2,667 shares of restricted stock that were granted to the reporting person on February 16, 2023. No shares were sold by the reporting person to satisfy this tax liability.

Footnote F4

Includes (i) shares acquired pursuant to the Issuer's Employee Stock Purchase Plan; such acquisitions are exempt under Rule 16b-3; and (ii) 3,333 shares of restricted stock granted to the reporting person on February 14, 2024 that vest in equal annual installments on the second and third anniversaries of the date of grant.

Footnote F5

Each phantom unit is the economic equivalent of one share of the Issuer's common stock. As required by the terms of the award, upon the February 14, 2026 partial vesting of such award, the reporting person settled the phantom units for cash at a rate of $47.80 per unit based upon the closing price of the Issuer's common stock on February 13, 2026. No shares of common stock were issued to nor sold by the reporting person pursuant to this transaction.

Footnote F6

The phantom units vest in equal annual installments on the first, second and third anniversaries of the date of grant, February 14, 2025.

Footnote F7

Each phantom unit is the economic equivalent of one share of the Issuer's common stock.

Footnote F8

The phantom units vest in equal annual installments on the first, second and third anniversaries of the date of grant.