Altus Midstream Company (a Delaware corporation)         Exhibit 21.1

Listing of Subsidiaries as of December 31, 2018

Exact Name of Subsidiary and Name             Jurisdiction of            

under which Subsidiary does Business        Incorporation or Organization    

Altus Midstream GP LLC                            Delaware

Altus Midstream LP                                Delaware

Alpine High Subsidiary GP LLC                        Delaware

Alpine High Gathering LP                            Delaware

Alpine High Processing LP                            Delaware

Alpine High NGL Pipeline LP                            Delaware

Alpine High Pipeline LP                            Delaware

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