Stonepeak Texas Midstream Holdco Form 3 Initial statement of insider ownership

Exhibit 99.1

STONEPEAK TEXAS MIDSTREAM HOLDCO LLC

By: STONEPEAK ASSOCIATES LLC, its managing member

By: STONEPEAK GP HOLDINGS LP, its sole member

By: STONEPEAK GP INVESTORS LLC, its general partner

By: STONEPEAK GP INVESTORS MANAGER LLC, its managing member

By: /s/ Michael Dorrell

Name:  Michael Dorrell

Title:  Managing MemberDate: 11/27/2020