X0306 4 2020-04-17 0 0001633651 Tallgrass Energy, LP TGE 0001770053 Blackstone Infrastructure Associates L.P. C/O THE BLACKSTONE GROUP INC. 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 0001770016 BIA GP L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001484870 Blackstone Holdings II L.P. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001464695 Blackstone Holdings I/II GP 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 2020-04-17 4 P 0 152770061 22.45 A 0 I See Footnote Class A shares 773510 I See Footnote Class A shares 1127935 I See Footnote Class A shares 21751018 I See Footnote Class A shares 92778793 I See Footnote Class B shares 7876328 I See Footnote TE units Class A shares 92778793 92778793 I See Footnotes TE units Class A shares 7876328 7876328 I See Footnotes On April 17, 2020, pursuant to a merger agreement, an affiliate of the Reporting Persons was merged with and into the Issuer, with the Issuer surviving the merger and continuing to exist as a Delaware limited partnership and owned, directly or indirectly, by the Acquiror LPs (as defined below). At the effective time of the merger (the "Effective Time"), each issued and outstanding Class A share representing limited partner interests of TGE ("Class A share") as of immediately prior to the Effective Time (other than the Class A shares owned by the Acquiror LPs) was converted into the right to receive $22.45 per Class A Share in cash without any interest thereon and was cancelled by the Issuer. These Class A shares are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror"). These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2"). These Class A shares are owned directly by Prairie Non-ECI Acquiror LP ("Non-ECI Acquiror"). 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", and together with Secondary Acquiror, Secondary Acquiror 2, Non-ECI Acquiror, and ECI Acquiror, the "Acquiror LPs"). BIP Holdings Manager L.L.C. is the general partner of each of the Acquiror LPs. Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager L.L.C. The general partner of Blackstone Infrastructure Associates L.P. 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 II L.P. The general partner of Blackstone Holdings II L.P. is Blackstone Holdings I/II GP L.L.C. The sole member of Blackstone Holdings I/II GP L.L.C. is The Blackstone Group Inc. The sole holder of 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. Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4. 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 2020-04-17 BIA GP L.P., By: BIA GP L.L.C., its general partner, By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 2020-04-17 BIA GP L.L.C., By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 2020-04-17 BLACKSTONE HOLDINGS II L.P., By: Blackstone Holdings I/II GP L.L.C., its general partner, By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2020-04-17 BLACKSTONE HOLDINGS I/II GP L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2020-04-17 THE BLACKSTONE GROUP INC., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2020-04-17 BLACKSTONE GROUP MANAGEMENT L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 2020-04-17 /s/ Stephen A. Schwarzman 2020-04-17