Sec Form 4 Filing - Prairie ECI Acquiror LP @ Tallgrass Energy, LP - 2019-07-30

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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Prairie ECI Acquiror LP 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 L.P., 345 PARK AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 07/30/2019 (Street) NEW YORK, NY10154 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 B shares 07/30/2019 C( 1 )( 2 ) 150,439 A 98,353,838 D

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 Obligation to Transfer ( 1 ) ( 2 ) 07/30/2019 C( 1 )( 2 ) 1 ( 1 ) ( 2 ) ( 1 )( 2 ) ( 1 )( 2 ) Class B shares and TE units ( 1 ) ( 2 ) ( 1 ) ( 2 ) 0 I See Footnotes ( 1 ) ( 2 ) TE units ( 3 ) 07/30/2019 C( 1 )( 2 ) 150,439 ( 3 ) ( 3 ) Class A shares 150,439 ( 1 ) ( 2 ) 98,353,838 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Prairie ECI Acquiror LP C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK, NY10154 X Signatures PRAIRIE ECI ACQUIROR LP, By: BIP Holdings Manager L.L.C., its general partner, By: /s/ Sean Klimczak, Name: Sean Klimczak, Title: Senior Managing Director 08/01/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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. ( 2 )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 affiliates of BIA 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 to Prairie ECI Acquiror LP. ( 3 )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.

Remarks: BIA and certain affiliates are separately filing a Form 4 related to the transfers described herein.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.