X0306 4 2019-07-30 0 0001633651 Tallgrass Energy, LP TGE 0001770053 Blackstone Infrastructure Associates L.P. C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001770017 BIA GP L.P. C/O THE BLACKSTONE GROUP INC.. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001770055 Prairie VCOC Acquiror LP C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001770016 BIA GP L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001404073 Blackstone Holdings III L.P. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001478809 Blackstone Holdings III GP L.P. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001478815 Blackstone Holdings III GP Management L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001393818 Blackstone Group Inc 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001404071 Blackstone Group Management L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001070844 SCHWARZMAN STEPHEN A C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 Class A shares 2019-07-30 4 C 0 66931 D 1127935 I See Footnotes Class B shares 2019-07-30 4 C 0 4158257 D 98353838 I See Footnotes Class B shares 2019-07-30 4 C 0 150439 D 2301283 I See Footnotes Class A shares 21751018 I See Footnotes Class A shares 773510 I See Footnotes Obligation to Transfer 2019-07-30 4 C 0 1 D Class A shares, Class B shares and TE units 0 I See Footnotes TE units 2019-07-30 4 C 0 4158257 D Class A shares 4158257 98353838 I See Footnotes TE units 2019-07-30 4 C 0 150439 D Class A shares 150439 2301283 I See Footnotes Pursuant to an Equityholders' Agreement dated as of March 11, 2019 (the "Equity Holders Agreement"), affiliates of Blackstone Infrastructure Associates L.P. ("BIA") were required to transfer to affiliates of Enagas, S.A. ("Enagas"), promptly after the Committee on Foreign Investments in the United States ("CFIUS") approved Enagas making further investments in securities of Tallgrass Energy, LP ("TGE"), such affiliates' indirect interests in certain Class A shares representing limited partner interests ("Class A shares") in TGE, Class B shares representing limited partner interests ("Class B shares") in TGE and units representing membership interests ("TE units") in Tallgrass Equity, LLC, pursuant to the terms of the Equity Holders Agreement, as described below. On July 30, 2019, promptly after the CFIUS approval described above was granted, and pursuant to the transfer obligations described above, affiliates of BIA disposed of (i) equity interests in affiliates of BIA representing BIA's indirect interest with respect to 66,931 Class A shares held by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2") plus a corresponding percentage of Secondary Acquiror 2's capital in exchange for approximately $14.1 million, and BIA's indirect interest in 4,308,696 Class B shares and 4,308,696 TE units in exchange for $83.4 million plus the assumption of $40.7 million of debt, to affiliates of Enagas. There was no change in the aggregate number of Class A shares, Class B shares or TE units held by the Acquiror LPs (as defined below) as a result of these transfers, other than a transfer of 150,439 Class B shares and 150,439 TE units from Prairie VCOC Acquiror LP ("VCOC Acquiror") to Prairie ECI Acquiror LP ("ECI Acquiror"). These Class A shares are owned directly Secondary Acquiror 2. These Class B shares and TE units are owned directly by Prairie ECI Acquiror LP ("ECI Acquiror"). These Class B shares and TE units are owned directly by Prairie VCOC Acquiror LP ("VCOC Acquiror"). These Class A shares are owned directly by Prairie Non-ECI Acquiror LP ("Non-ECI Acquiror"). These Class A shares are owned directly by Prairie Secondary Acquiror LP (together with Secondary Acquiror 2, ECI Acquiror, Non-ECI Acquiror and Secondary Acquiror, the "Acquiror LPs"). The general partner of BIA is BIA GP L.P. The general partner of BIA GP L.P. is BIA GP L.L.C. The sole member of BIA GP L.L.C. is Blackstone Holdings III L.P. The general partner of Blackstone Holdings III L.P. is Blackstone Holdings III GP L.P. The general partner of Blackstone Holdings III GP L.P. is Blackstone Holdings III GP Management L.L.C. The sole member of Blackstone Holdings III GP Management L.L.C. is The Blackstone Group Inc. (f/k/a The Blackstone Group L.P.). The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman. TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled. Each of the Reporting Persons, disclaims beneficial ownership of the securities held by the Acquiror LPs, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose or that any of the transactions reported herein are subject to Section 16. Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person. PRAIRIE VCOC ACQUIROR LP, By: BIA Holdings Manager L.L.C., its general partner, By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 2019-08-01 BLACKSTONE INFRASTRUCTURE ASSOCIATES L.P., By: BIA GP L.P., its general partner, By: BIA GP L.L.C., its general partner, By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 2019-08-01 BIA GP L.P., By: BIA GP L.L.C., its general partner, By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 2019-08-01 BIA GP L.L.C., By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 2019-08-01 BLACKSTONE HOLDINGS III L.P., By: Blackstone Holdings III GP L.P., its general partner, By: Blackstone Holdings III GP Management .L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2019-08-01 BLACKSTONE HOLDINGS III GP L.P., By: Blackstone Holdings III GP Management L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2019-08-01 BLACKSTONE HOLDINGS III GP MANAGEMENT L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2019-08-01 THE BLACKSTONE GROUP INC., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2019-08-01 BLACKSTONE GROUP MANAGEMENT L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2019-08-01 By: /s/ Steven A. Schwarzman, Name: Steven A. Schwarzman 2019-08-01