Sec Form 4 Filing - Blackstone Infrastructure Associates L.P. @ Tallgrass Energy, LP - 2020-04-17

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Blackstone Infrastructure Associates L.P. 2. Issuer Name and Ticker or Trading Symbol Tallgrass Energy, LP [ TGE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O THE BLACKSTONE GROUP INC., 345 PARK AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 04/17/2020 (Street) NEW YORK, NY10154 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A shares 04/17/2020 P 152,770,061 A $ 22.45 ( 1 ) 0 ( 1 ) I See Footnote ( 1 ) Class A shares 773,510 I See Footnote ( 2 ) ( 7 ) ( 9 ) ( 10 ) ( 11 ) Class A shares 1,127,935 I See Footnote ( 3 ) ( 7 ) ( 9 ) ( 10 ) ( 11 ) Class A shares 21,751,018 I See Footnote ( 4 ) ( 7 ) ( 9 ) ( 10 ) ( 11 ) Class A shares 92,778,793 I See Footnote ( 5 ) ( 7 ) ( 9 ) ( 10 ) ( 11 ) Class B shares 7,876,328 I See Footnote ( 6 ) ( 7 ) ( 9 ) ( 10 ) ( 11 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares TE units ( 8 ) ( 8 ) ( 8 ) Class A shares 92,778,793 92,778,793 I See Footnotes ( 5 ) ( 7 ) ( 9 ) ( 10 ) ( 11 ) TE units ( 8 ) ( 8 ) ( 8 ) Class A shares 7,876,328 7,876,328 I See Footnotes ( 6 ) ( 7 ) ( 9 ) ( 10 ) ( 11 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Blackstone Infrastructure Associates L.P. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK, NY10154 X BIA GP L.P. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK, NY10154 X BIA GP L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK, NY10154 X Blackstone Holdings II L.P. 345 PARK AVENUE NEW YORK, NY10154 X Blackstone Holdings I/II GP L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK, NY10154 X Blackstone Group Inc 345 PARK AVENUE NEW YORK, NY10154 X Blackstone Group Management L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK, NY10154 X SCHWARZMAN STEPHEN A C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK, NY10154 X Signatures 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 04/17/2020 Signature of Reporting Person Date BIA GP L.P., By: BIA GP L.L.C., its general partner, By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 04/17/2020 Signature of Reporting Person Date BIA GP L.L.C., By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 04/17/2020 Signature of Reporting Person Date 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 04/17/2020 Signature of Reporting Person Date BLACKSTONE HOLDINGS I/II GP L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 04/17/2020 Signature of Reporting Person Date THE BLACKSTONE GROUP INC., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 04/17/2020 Signature of Reporting Person Date BLACKSTONE GROUP MANAGEMENT L.L.C., By: /s/ John G. Finley, Name: John G. Finley, Title: Chief Legal Officer 04/17/2020 Signature of Reporting Person Date /s/ Stephen A. Schwarzman 04/17/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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. ( 2 )These Class A shares are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror"). ( 3 )These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2"). ( 4 )These Class A shares are owned directly by Prairie Non-ECI Acquiror LP ("Non-ECI Acquiror"). ( 5 )These Class B shares and TE units are owned directly by Prairie ECI Acquiror LP ("ECI Acquiror"). ( 6 )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"). ( 7 )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. ( 8 )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. ( 9 )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. ( 10 )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. ( 11 )Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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