Sunrun Inc.

Rule 10b5-1 Disclosure

On September 15, 2026, Ed Fenster, our Co-founder, Vice Chair, and a member of our Board, adopted a trading plan for the sale of the Company’s common stock that is intended to satisfy the affirmative defense of Rule 10b5-1(c). The trading plan is set to expire on September 16, 2027, and provides for the following transactions, each of which is subject to the Company’s stock price reaching certain price thresholds: (i) the exercise of up to 104,000 stock options and the sale of the underlying shares of common stock, and (ii) the sale of up to 1,501,613 shares of common stock, plus certain net shares from specified restricted stock unit vestings and additional option exercises. The adopted plan has limits that range from $1.00 to $104.58, with share sales below $13.50 limited to 326,480 or fewer shares. The Company was informed by Mr. Fenster that the plan's lower price thresholds are intended for tax planning purposes, with the structure derived to generate a targeted tax loss amount.