X0306 4 2019-12-05 0 0001607716 Vivint Solar, Inc. VSLR 0001673823 Bywater David 1800 WEST ASHTON BLVD LEHI UT 84043 1 1 0 0 Chief Executive Officer Common Stock 2019-12-05 4 M 0 5045 2.85 A 1103477 D Common Stock 2019-12-05 4 S 0 5045 7.50 D 1098432 D Common Stock 2019-12-06 4 S 0 19443 7.2447 D 1078989 D Stock Option (Right to Buy) 2.85 2019-12-05 4 M 0 5045 0.00 D 2026-12-14 Common Stock 5045 499855 D The sales reported by Mr. Bywater were effected pursuant to a Rule 10b5-1 trading plan. These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations pursuant to a Rule 10b5-1 Plan in connection with the settlement of an award of restricted stock units. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $7.14 to $7.32, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein. The shares subject to this option shall vest at the rate of 25% of the total number of shares on December 6, 2017 and thereafter 6.25% of the total shares subject to this option shall vest in equal quarterly installments beginning March 6, 2018, until the option is fully vested; in each such case subject to the Reporting Person's continued service to the Issuer or any subsidiary of the Issuer through each such date. /s/ Dana C. Russell, attorney-in-fact 2019-12-09