Prairie VCOC Acquiror LP

SEC source: 0000899243-20-010892 · doc4.xml · nonDerivative · entry 1

Prairie Secondary Acquiror LP · CIK 0001770030 · 10% owner

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

Prairie Non-ECI Acquiror LP · CIK 0001770007 · 10% owner

Prairie ECI Acquiror LP · CIK 0001770013 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 10% owner

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

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · price: On April 17, 2020, pursuant to a merger agreement, an affiliate of the Reporting Persons was merged with and into the Issuer, with the Issuer surviving the merger and continuing to exist as a Delaware limited partnership and owned, directly or indirectly, by the Acquiror LPs (as defined below). At the effective time of the merger (the "Effective Time"), each issued and outstanding Class A share representing limited partner interests of TGE ("Class A share") as of immediately prior to the Effective Time (other than the Class A shares owned by the Acquiror LPs) was converted into the right to receive $22.45 per Class A Share in cash without any interest thereon and was cancelled by the Issuer.

F1 · balance_after: On April 17, 2020, pursuant to a merger agreement, an affiliate of the Reporting Persons was merged with and into the Issuer, with the Issuer surviving the merger and continuing to exist as a Delaware limited partnership and owned, directly or indirectly, by the Acquiror LPs (as defined below). At the effective time of the merger (the "Effective Time"), each issued and outstanding Class A share representing limited partner interests of TGE ("Class A share") as of immediately prior to the Effective Time (other than the Class A shares owned by the Acquiror LPs) was converted into the right to receive $22.45 per Class A Share in cash without any interest thereon and was cancelled by the Issuer.

F1 · ownership.nature: On April 17, 2020, pursuant to a merger agreement, an affiliate of the Reporting Persons was merged with and into the Issuer, with the Issuer surviving the merger and continuing to exist as a Delaware limited partnership and owned, directly or indirectly, by the Acquiror LPs (as defined below). At the effective time of the merger (the "Effective Time"), each issued and outstanding Class A share representing limited partner interests of TGE ("Class A share") as of immediately prior to the Effective Time (other than the Class A shares owned by the Acquiror LPs) was converted into the right to receive $22.45 per Class A Share in cash without any interest thereon and was cancelled by the Issuer.

SEC source: 0000899243-19-025048 · doc4.xml · derivative · entry 7

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

Prairie ECI Acquiror LP · CIK 0001770013 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 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: 7,876,328

Underlying: Class A shares · 5,575,045 shares

Expires not disclosed

F9 · derivative.exercise_price: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F2 · kind: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F2 · price: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F9 · derivative.exercise_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F9 · derivative.expiration_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F6 · ownership.nature: These Class B shares and TE units are owned directly by VCOC Acquiror.

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. 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.

F12 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

SEC source: 0000899243-19-025048 · doc4.xml · derivative · entry 6

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

Prairie ECI Acquiror LP · CIK 0001770013 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 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: 92,778,793

Underlying: Class A shares · 5,575,045 shares

Expires not disclosed

F9 · derivative.exercise_price: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F2 · kind: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F2 · price: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F9 · derivative.exercise_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F9 · derivative.expiration_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F5 · ownership.nature: These Class B shares and TE units are owned directly by ECI Acquiror.

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. 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.

F12 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

SEC source: 0000899243-19-025048 · doc4.xml · nonDerivative · entry 4

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

Prairie ECI Acquiror LP · CIK 0001770013 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 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: 7,876,328

F2 · kind: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F2 · price: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F6 · ownership.nature: These Class B shares and TE units are owned directly by VCOC Acquiror.

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. 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.

F12 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

SEC source: 0000899243-19-025048 · doc4.xml · nonDerivative · entry 3

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

Prairie ECI Acquiror LP · CIK 0001770013 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 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: 92,778,793

F2 · kind: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F2 · price: On October 1, 2019, Prairie ECI Acquiror LP ("ECI Acquiror") distributed to an affiliate of BIA beneficial ownership of 5,575,045 Class B shares ("Class B shares") representing limited partner interests in TGE and 5,575,045 units ("TE units") representing membership interests in Tallgrass Equity, LLC, and portion of its member interest in the entity which owns the Issuer's general partner, and such affiliate transferred such Class B shares, TE units and member interest to Prairie VCOC Acquiror LP ("VCOC Acquiror") in exchange for approximately $98.8 million and the assumption of approximately $50.3 million of debt.

F5 · ownership.nature: These Class B shares and TE units are owned directly by ECI Acquiror.

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. 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.

F12 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

SEC source: 0000899243-19-025048 · doc4.xml · nonDerivative · entry 2

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

Prairie ECI Acquiror LP · CIK 0001770013 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 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: On October 1, 2019, an affiliate of Blackstone Infrastructure Associates L.P. ("BIA") transferred ownership interests in Prairie Secondary Acquiror LP ("Secondary Acquiror") and Prairie Secondary Acquiror E LP ("Secondary Acquiror 2") to another affiliate of BIA at a transfer price based on $24.13 per Class A share ("Class A shares") representing limited partner interests in Tallgrass Energy, LP ("TGE"). There was no change in the aggregate number of Class A shares owned by Secondary Acquiror or Secondary Acquiror 2 as a result of these transfers, but BIA and certain other affiliated Reporting Persons may be deemed to have disposed of a portion of their pecuniary interest in TGE's Class A shares held by Secondary Acquiror and Secondary Acquiror E as a result of such transfers.

F1 · price: On October 1, 2019, an affiliate of Blackstone Infrastructure Associates L.P. ("BIA") transferred ownership interests in Prairie Secondary Acquiror LP ("Secondary Acquiror") and Prairie Secondary Acquiror E LP ("Secondary Acquiror 2") to another affiliate of BIA at a transfer price based on $24.13 per Class A share ("Class A shares") representing limited partner interests in Tallgrass Energy, LP ("TGE"). There was no change in the aggregate number of Class A shares owned by Secondary Acquiror or Secondary Acquiror 2 as a result of these transfers, but BIA and certain other affiliated Reporting Persons may be deemed to have disposed of a portion of their pecuniary interest in TGE's Class A shares held by Secondary Acquiror and Secondary Acquiror E as a result of such transfers.

F4 · ownership.nature: These Class A shares are owned directly by 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. 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.

F12 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

SEC source: 0000899243-19-025048 · doc4.xml · nonDerivative · entry 1

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

Prairie ECI Acquiror LP · CIK 0001770013 · 10% owner

Prairie VCOC Acquiror LP · CIK 0001770055 · 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: On October 1, 2019, an affiliate of Blackstone Infrastructure Associates L.P. ("BIA") transferred ownership interests in Prairie Secondary Acquiror LP ("Secondary Acquiror") and Prairie Secondary Acquiror E LP ("Secondary Acquiror 2") to another affiliate of BIA at a transfer price based on $24.13 per Class A share ("Class A shares") representing limited partner interests in Tallgrass Energy, LP ("TGE"). There was no change in the aggregate number of Class A shares owned by Secondary Acquiror or Secondary Acquiror 2 as a result of these transfers, but BIA and certain other affiliated Reporting Persons may be deemed to have disposed of a portion of their pecuniary interest in TGE's Class A shares held by Secondary Acquiror and Secondary Acquiror E as a result of such transfers.

F1 · price: On October 1, 2019, an affiliate of Blackstone Infrastructure Associates L.P. ("BIA") transferred ownership interests in Prairie Secondary Acquiror LP ("Secondary Acquiror") and Prairie Secondary Acquiror E LP ("Secondary Acquiror 2") to another affiliate of BIA at a transfer price based on $24.13 per Class A share ("Class A shares") representing limited partner interests in Tallgrass Energy, LP ("TGE"). There was no change in the aggregate number of Class A shares owned by Secondary Acquiror or Secondary Acquiror 2 as a result of these transfers, but BIA and certain other affiliated Reporting Persons may be deemed to have disposed of a portion of their pecuniary interest in TGE's Class A shares held by Secondary Acquiror and Secondary Acquiror E as a result of such transfers.

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

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. 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.

F12 · ownership.nature: Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4.

SEC source: 0000899243-19-020844 · doc4.xml · derivative · entry 8

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: 2,301,283

Underlying: Class A shares · 150,439 shares

Expires not disclosed

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.

F9 · derivative.exercise_price: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

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").

F1 · price: 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 · 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").

F9 · derivative.exercise_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F9 · derivative.expiration_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F2 · balance_after: 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 · balance_after: These Class A shares are owned directly Secondary Acquiror 2.

F5 · ownership.nature: These Class B shares and TE units are owned directly by Prairie VCOC Acquiror LP ("VCOC Acquiror").

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: 0000899243-19-020844 · doc4.xml · derivative · entry 7

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: 98,353,838

Underlying: Class A shares · 4,158,257 shares

Expires not disclosed

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.

F9 · derivative.exercise_price: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

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").

F1 · price: 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 · 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").

F9 · derivative.exercise_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F9 · derivative.expiration_date: TE units may be exchanged by the holders thereof for an equivalent number of Class A shares and upon such exchange, an equivalent number of Class B shares held by such holder will be cancelled.

F2 · balance_after: 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 · balance_after: These Class A shares are owned directly Secondary Acquiror 2.

F4 · ownership.nature: These Class B shares and TE units are owned directly by Prairie ECI Acquiror LP ("ECI Acquiror").

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: 0000899243-19-020844 · doc4.xml · derivative · entry 6

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: 0

Underlying: Class A shares, Class B shares and TE units · Not disclosed shares

Expires not disclosed

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 · derivative.exercise_price: 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 · derivative.exercise_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").

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").

F1 · shares: 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 · shares: 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").

F1 · price: 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 · 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").

F1 · derivative.exercise_date: 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 · derivative.exercise_date: 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").

F1 · derivative.expiration_date: 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 · derivative.expiration_date: 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").

F1 · derivative.underlying_shares: 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 · derivative.underlying_shares: 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").

F1 · ownership.nature: 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 · ownership.nature: 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").

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: 0000899243-19-020844 · doc4.xml · nonDerivative · entry 3

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: 2,301,283

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").

F2 · balance_after: 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").

F5 · ownership.nature: These Class B shares and TE units are owned directly by Prairie VCOC Acquiror LP ("VCOC Acquiror").

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: 0000899243-19-020844 · doc4.xml · nonDerivative · entry 2

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: 98,353,838

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").

F2 · balance_after: 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").

F4 · ownership.nature: These Class B shares and TE units are owned directly by Prairie ECI Acquiror LP ("ECI Acquiror").

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: 0000899243-19-020844 · 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.