Blackstone Infrastructure Associates L.P.

SEC source: 0000899243-19-020844 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Blackstone Holdings III L.P. · CIK 0001404073 · 10% owner

Blackstone Holdings III GP L.P. · CIK 0001478809 · 10% owner

Blackstone Holdings III GP Management L.L.C. · CIK 0001478815 · 10% owner

Blackstone Group Inc · CIK 0001393818 · 10% owner

Blackstone Group Management L.L.C. · CIK 0001404071 · 10% owner

SCHWARZMAN STEPHEN A · CIK 0001070844 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,127,935

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 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.

F2 · kind: 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").

F2 · price: 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").

F3 · ownership.nature: These Class A shares are owned directly Secondary Acquiror 2.

F8 · ownership.nature: 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.

F10 · ownership.nature: 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.

F11 · ownership.nature: 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.

SEC source: 0000899243-19-013128 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,127,935

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.05 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price in the range set forth above.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-013128 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 773,510

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.05 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price in the range set forth above.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-012583 · doc4.xml · nonDerivative · entry 6

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,056,751

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.93 to $24.50, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-012583 · doc4.xml · nonDerivative · entry 5

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 724,694

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.93 to $24.50, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-012583 · doc4.xml · nonDerivative · entry 4

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,013,744

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.77 to $24.30, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-012583 · doc4.xml · nonDerivative · entry 3

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 695,201

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.77 to $24.30, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-012583 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 974,593

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.80 to $24.01, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-012583 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 668,352

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.80 to $24.01, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011917 · doc4.xml · nonDerivative · entry 6

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 923,934

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.62 to $23.90, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011917 · doc4.xml · nonDerivative · entry 5

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 633,611

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.62 to $23.90, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011917 · doc4.xml · nonDerivative · entry 4

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 837,920

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.78 to $24.20, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011917 · doc4.xml · nonDerivative · entry 3

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 574,625

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.78 to $24.20, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011917 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 766,524

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.01 to $24.34, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011917 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 525,663

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.01 to $24.34, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011347 · doc4.xml · nonDerivative · entry 6

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 701,272

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.00 to $24.33, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011347 · doc4.xml · nonDerivative · entry 5

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 480,915

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.00 to $24.33, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011347 · doc4.xml · nonDerivative · entry 4

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 635,427

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.28 to $24.50, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011347 · doc4.xml · nonDerivative · entry 3

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 435,760

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.28 to $24.50, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011347 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 546,388

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.33 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011347 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 374,699

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.33 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011065 · doc4.xml · nonDerivative · entry 6

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 504,211

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.46 to $24.50, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011065 · doc4.xml · nonDerivative · entry 5

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 345,776

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.46 to $24.50, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011065 · doc4.xml · nonDerivative · entry 4

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 485,885

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.48 to $24.50, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011065 · doc4.xml · nonDerivative · entry 3

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 333,208

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.48 to $24.50, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011065 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 478,135

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.45 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-011065 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 327,894

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.45 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010933 · doc4.xml · nonDerivative · entry 4

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 477,898

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.33 to $24.50, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010933 · doc4.xml · nonDerivative · entry 3

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 327,731

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.33 to $24.50, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010933 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 402,206

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.41 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 10 to this Form 4.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010933 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 275,823

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.41 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 10 to this Form 4.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010532 · doc4.xml · nonDerivative · entry 6

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 400,592

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.47 to $24.50, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010532 · doc4.xml · nonDerivative · entry 5

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 274,717

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.47 to $24.50, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010532 · doc4.xml · nonDerivative · entry 4

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 384,681

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.46 to $24.50, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010532 · doc4.xml · nonDerivative · entry 3

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 263,805

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.46 to $24.50, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010532 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 380,879

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.41 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-010532 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 261,197

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.41 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-009267 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 353,413

F1 · kind: The Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") acquired by the Reporting Persons were issuable by TGE to certain members of TGE management in connection with the accelerated vesting of incentive awards held by such persons upon the closing of the transactions contemplated by the Purchase Agreement, dated January 30, 2019, by and among Tallgrass Energy Holdings, LLC, Tallgrass Holdings, LLC, certain affiliates of the Reporting Persons, and other parties thereto. The Reporting Persons agreed to acquire these Class A shares to provide the selling management members with liquidity consistent with what would have been provided if the incentive awards had been settled in cash.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-009267 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 242,362

F1 · kind: The Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") acquired by the Reporting Persons were issuable by TGE to certain members of TGE management in connection with the accelerated vesting of incentive awards held by such persons upon the closing of the transactions contemplated by the Purchase Agreement, dated January 30, 2019, by and among Tallgrass Energy Holdings, LLC, Tallgrass Holdings, LLC, certain affiliates of the Reporting Persons, and other parties thereto. The Reporting Persons agreed to acquire these Class A shares to provide the selling management members with liquidity consistent with what would have been provided if the incentive awards had been settled in cash.

F2 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-009068 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 170,119

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.49 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-009068 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 116,664

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.49 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008735 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 167,704

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.39 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008735 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 116,379

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $24.39 to $24.50, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008264 · doc4.xml · nonDerivative · entry 6

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 168,765

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.96 to $24.29, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008264 · doc4.xml · nonDerivative · entry 5

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 115,735

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.96 to $24.29, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008264 · doc4.xml · nonDerivative · entry 4

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 124,275

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.89 to $24.44, inclusive.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008264 · doc4.xml · nonDerivative · entry 3

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 85,225

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.89 to $24.44, inclusive.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008264 · doc4.xml · nonDerivative · entry 2

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 64,955

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.79 to $24.085, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F3 · ownership.nature: These Class A shares are owned directly by Prairie Secondary Acquiror E LP ("Secondary Acquiror 2").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.

SEC source: 0000899243-19-008264 · doc4.xml · nonDerivative · entry 1

Blackstone Infrastructure Associates L.P. · CIK 0001770053 · 10% owner

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

Prairie Secondary Acquiror E LP · CIK 0001770475 · 10% owner

BIP Holdings Manager L.L.C. · CIK 0001770015 · 10% owner

BIA GP L.P. · CIK 0001770017 · 10% owner

BIA GP L.L.C. · CIK 0001770016 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 44,545

F1 · kind: The purchases reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.79 to $24.085, inclusive. The Reporting Persons undertake to provide to TGE, any security holder of TGE, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price set forth in footnotes 9 through 11 to this Form 4.

F2 · ownership.nature: These Class A shares representing limited partner interests ("Class A shares") of Tallgrass Energy, LP ("TGE") are owned directly by Prairie Secondary Acquiror LP ("Secondary Acquiror 1").

F5 · ownership.nature: BIP Holdings Manager L.L.C. is the general partner of each of Secondary Acquiror 1, Secondary Acquiror 2 and Non-ECI Acquiror (the "Acquiror LPs"). Blackstone Infrastructure Associates L.P. is the managing member of BIP Holdings Manager LLC. 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 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 L.P. The general partner of The Blackstone Group L.P. 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.

F6 · ownership.nature: Each of the Reporting Persons (other than each of the Acquiror LPs to the extent they directly hold securities reported herein), 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 (other than each of the Acquiror LPs to the extent they directly hold securities reported herein) 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.

F7 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

F8 · ownership.nature: 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.