SES AI Corp

Rule 10b5-1 Trading Arrangements

On January 5, 2024, Jing Nealis (our Chief Financial Officer)terminated a Rule 10b5-1 plan that had been adopted on June 14, 2022 which provided for the sale of a number of shares of Class A common stock sufficient to cover satisfy minimum statutory withholding tax obligations upon vesting of a restricted share award granted on August 16, 2021.

On February 9, 2024, each of Qichao Hu (our Founder, Chairman and Chief Executive Officer), Jing Nealis (our Chief Financial Officer), Hong Gan (our Chief Science Officer), Kyle Pilkington (our Chief Legal Officer) and Gang “Daniel” Li (our Chief Manufacturing Officer, and collectively with Dr. Hu, Ms. Nealis, Dr. Gan, and Mr. Pilkington, the “Executive Officers”) entered into written stock selling plans in accordance with Rule 10b5-1 (the “Plans”) under the Exchange Act in connection with the sale of shares of Class A common stock underlying RSUs and PSUs granted to Dr. Hu, Ms. Nealis, Dr. Gan, Mr. Pilkington and Mr. Li on February 9, 2024. The Plans provide for the sale of only such number of shares necessary to satisfy minimum statutory withholding tax obligations arising from the vesting of such equity awards (with the RSUs vesting subject to continued service in three equal installments on each anniversary of the grant date, and the PSUs vesting subject to continued service and performance in one installment following athree-year performance period after the grant date), and, thus, the exact number of shares to be sold is unknown. Each Plan expires once all shares are sold to satisfy the applicable Executive Officer’s withholding tax obligations.