Sunrun Inc.

On February 25, 2026, a wholly owned subsidiary of the Company entered into an amendment (the “Amendment”) to a syndicated, senior secured credit facility originally entered into with various lenders on April 20, 2021, which has previously been amended nine times (as amended, the “Credit Facility”). Prior to the Amendment, the Credit Facility had commitments of $2.63 billion and matured on February 16, 2028. Prior to and after the Amendment, the Credit Facility is non-recourse to the Company and is secured by net cash flows from power purchase agreements and leases available to the subsidiary borrower after distributions to tax equity investors and payment of certain operating, maintenance and other expenses. After giving effect to the Amendment, the Credit Facility will also be secured by net cash flows available to borrower from distributions received by the borrower from the sale of tax credits.

The Amendment amends certain terms of the Credit Facility, including:

•extending the maturity date to February 26, 2030;

•increasing total loan commitments available by $70.0 million, bringing the total commitments to $2.7 billion.

*the inclusion in the borrowing base of a percentage of certain proceeds expected to be received by subsidiaries of, and distributed to, the borrower from the sale of investment tax credits.

The foregoing description of the Amendment is qualified in its entirety by reference to the full text of the Amendment, a copy of which is filed as an exhibit to this Annual Report on Form 10-K for the year ended December 31, 2025.

Rule 10b5-1 Disclosure

During our last fiscal quarter, certain of our directors and officers (as defined in Rule 16a-1(f) under the Exchange Act)adopted orterminated the contracts, instructions or written plans for the purchase or sale of our securities as noted below.

On December 12, 2025, Paul Dickson, our President and Chief Revenue Officer, 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 February 16, 2027, and provides for the sale of up to 195,095 shares of common stock, subject to the Company's stock price reaching certain price thresholds.

On December 4, 2025, Mary Powell, our Chief Executive Officer, 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 March 1, 2027, and provides for the sale of up to 68,000 shares of common stock, subject to the Company's stock price reaching certain price thresholds.

On December 5, 2025, Jeanna Steele, our Chief Legal Officer and Chief People Officer, 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 April 5, 2027, and provides for the sale of up to 130,958 shares of common stock, subject to the Company's stock price reaching certain price thresholds.