X0306 4 2022-09-15 0 0001136352 Crestwood Equity Partners LP CEQP 0001706604 First Reserve GP XIII Ltd 262 HARBOR DRIVE, THIRD FLOOR, SUITE 3100 STAMFORD CT 06902 1 0 1 0 0001935823 First Reserve GP XIII, L.P. 262 HARBOR DRIVE, THIRD FLOOR SUITE 3100 STAMFORD CT 06902 1 0 1 0 0001935820 FR XIII Crestwood Permian Basin Holdings LLC 262 HARBOR DRIVE, THIRD FLOOR SUITE 3100 STAMFORD CT 06902 1 0 1 0 0001935822 FR XIII Charlie AIV, L.P. 262 HARBOR DRIVE, THIRD FLOOR SUITE 3100 STAMFORD CT 06902 1 0 1 0 Common Units 2022-09-15 4 A 0 914 0.00 A 914 I See footnote Common Units 11275546 I See footnote Restricted units granted to Gary Reaves under the Crestwood Equity Partners LP 2018 Long Term Incentive Plan, as amended. The restricted units vest on January 5, 2023. Represents restricted units held by Mr. Reaves, a Managing Director and member of the Board of Directors of First Reserve GP XIII Limited. Mr. Reaves holds these securities for the benefit of one or more of the reporting persons and/or certain of their affiliates or certain of the funds they manage. Represents common units representing limited partner interests of Crestwood Equity Partners LP held directly by FR XIII Crestwood Permian Basin Holdings LLC ("First Reserve XIII"). This form is filed jointly by First Reserve GP XIII Limited, First Reserve GP XIII, L.P., First Reserve XIII and FR XIII Charlie AIV, L.P. FR XIII Charlie AIV, L.P. is the managing member of First Reserve XIII. First Reserve GP XIII, L.P. is the general partner of Charlie AIV, L.P. First Reserve GP XIII Limited is the general partner of First Reserve GP XIII, L.P. Mr. Reaves is a Managing Director and member of the Board of Directors of First Reserve GP XIII Limited. Each of First Reserve GP XIII Limited, First Reserve GP XIII, L.P., First Reserve XIII and FR XIII Charlie AIV, L.P. may be deemed to be a director by deputization of the Issuer. The Reporting Persons disclaim beneficial ownership of the securities reported on this Form 4 except to the extent of their pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of these securities for purposes of Section 16 of the Securities Exchange Act of 1934 or for any other purpose. FIRST RESERVE GP XIII LIMITED, By: /s/ Erica H. Radcliffe, Name: Erica H. Radcliffe, General Counsel & Chief Compliance Officer 2022-09-19 FIRST RESERVE GP XIII, L.P., By: First Reserve GP XIII Limited, its general partner, By: /s/ Erica H. Radcliffe, Name: Erica H. Radcliffe, General Counsel & Chief Compliance Officer 2022-09-19 FR XIII CRESTWOOD PERMIAN BASIN HOLDINGS LLC, By: FR XIII Charlie AIV, L.P., its man. mem., By: First Reserve GP XIII, L.P., its GP, By: First Reserve GP XIII Limited, its GP, By: /s/ Erica H. Radcliffe, Name: Erica H. Radcliffe, General Counsel & CCO 2022-09-19 FR XIII CHARLIE AIV, L.P. By: First Reserve GP XIII, L.P., its general partner, By: First Reserve GP XIII Limited, its general partner, By: /s/ Erica H. Radcliffe, Name: Erica H. Radcliffe, General Counsel & Chief Compliance Officer 2022-09-19