X0306 4 2020-10-12 1 0001469367 Sunrun Inc. RUN 0001404073 Blackstone Holdings III L.P. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001478809 Blackstone Holdings III GP L.P. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001478815 Blackstone Holdings III GP Management L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001393818 Blackstone Group Inc 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001404071 Blackstone Group Management L.L.C. C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001070844 SCHWARZMAN STEPHEN A C/O THE BLACKSTONE GROUP INC. 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 Common Stock 2020-10-12 4 S 0 6024784 60.25 D 12277503 I See Footnotes Common Stock 2020-10-12 4 S 0 1935494 60.25 D 3944216 I See Footnotes Common Stock 2020-10-12 4 S 0 3050 60.25 D 6217 I See Footnotes Common Stock 2020-10-12 4 S 0 36672 60.25 D 74732 I See Footnotes Reflects securities held directly by Blackstone Capital Partners VI L.P. Reflects securities held directly by Blackstone VNT Co-Invest L.P. Reflects securities held directly by Blackstone Family Investment Partnership VI L.P. Reflects securities held directly by Blackstone Family Investment Partnership VI-ESC L.P. The general partner of Blackstone Capital Partners VI L.P. and Blackstone VNT Co-Invest L.P. is Blackstone Management Associates VI L.P. The sole member of Blackstone Management Associates VI L.L.C. is BMA VI L.L.C. The general partner of Blackstone Family Investment Partnership VI L.P. and Blackstone Family Investment Partnership VI-ESC L.P is BCP VI Side-by-Side GP L.L.C. Blackstone Holdings III L.P. is the managing member of BMA VI L.L.C. and the sole member of BCP VI Side-by-Side GP L.L.C. Blackstone Holdings III GP L.P. is the general partner of Blackstone Holdings III L.P. Blackstone Holdings III GP Management L.L.C. is the general partner of Blackstone Holdings III GP L.P. The Blackstone Group Inc. is the sole member of Blackstone Holdings III GP Management L.L.C. 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. Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person. Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 4. Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, 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 to the extent it directly holds 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. BLACKSTONE HOLDINGS III L.P., By: Blackstone Holdings III GP L.P., its general partner, By: Blackstone Holdings III GP Management L.L.C., its general partner, By: /s/ Tabea Y. Hsi, Name: Tabea Y. Hsi, Title: Managing Director 2020-10-14 BLACKSTONE HOLDINGS III GP L.P., By: Blackstone Holdings III GP Management L.L.C., its general partner, By: /s/ Tabea Y. Hsi, Name: Tabea Y. Hsi, Title: Managing Director 2020-10-14 BLACKSTONE HOLDINGS III GP MANAGEMENT L.L.C., By: /s/ Tabea Y. Hsi, Name: Tabea Y. Hsi, Title: Managing Director 2020-10-14 THE BLACKSTONE GROUP INC., By: /s/ Tabea Y. Hsi, Name: Tabea Y. Hsi, Title: Managing Director 2020-10-14 BLACKSTONE GROUP MANAGEMENT L.L.C., By: /s/ Tabea Y. Hsi, Name: Tabea Y. Hsi, Title: Managing Director 2020-10-14 /s/ Stephen A. Schwarzman 2020-10-14