Exhibit 22.1

List of Subsidiary Guarantors

As of March 31, 2023, the following subsidiaries of Matador Resources Company (the “Company”) were guarantors of the Company’s 5.875% Senior Notes due 2026.

Name	Jurisdiction
Delaware Water Management Company, LLC	Texas
Longwood Gathering and Disposal Systems GP, Inc.	Texas
Longwood Gathering and Disposal Systems, LP	Texas
Longwood Midstream Delaware, LLC	Texas
Longwood Midstream Holdings, LLC	Texas
Longwood Midstream Southeast, LLC	Texas
Longwood Midstream South Texas, LLC	Texas
Matador Production Company	Texas
MRC Delaware Resources, LLC	Texas
MRC Energy Company	Texas
MRC Energy Southeast Company, LLC	Texas
MRC Energy South Texas Company, LLC	Texas
MRC Permian Company	Texas
MRC Permian LKE Company, LLC	Texas
MRC Rockies Company	Texas
Southeast Water Management Company, LLC	Texas
WR Permian, LLC	Delaware