NATIONAL GRID PLC ENTERPRISE PRODUCTS PARTNERS L.P. TC ENERGY CORP KINDER MORGAN, INC. WILLIAMS COMPANIES, INC. Energy Transfer LP Targa Resources Corp. Western Midstream Partners, LP DCP Midstream, LP Antero Midstream Corp Equitrans Midstream Corp EnLink Midstream, LLC RATTLER MIDSTREAM LP USA Compression Partners, LP Archrock, Inc. Altus Midstream Co GAS TRANSPORTER OF THE SOUTH INC NGL Energy Partners LP Summit Midstream Partners, LP Mirage Energy Corp DT Midstream, Inc. TC ENERGY CORP NATIONAL GRID PLC TC ENERGY CORP NATIONAL GRID PLC NATIONAL GRID PLC DCP Midstream, LP Enable Midstream Partners, LP SOUTHERN CALIFORNIA GAS CO NGL Energy Partners LP NGL Energy Partners LP SOUTHERN CALIFORNIA GAS CO Energy Transfer LP Energy Transfer LP Energy Transfer LP NATIONAL GRID PLC NATIONAL GRID PLC Altus Midstream Co KINDER MORGAN, INC. DCP Midstream, LP