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Insider Trading Arrangements
 3 Months Ended
Mar. 31, 2025
shares
Trading Arrangements, by Individual  
Material Terms of Trading Arrangement

On March 4, 2025, Jing Nealis (our Chief Financial Officer) terminated a Rule 10b5-1 plan that had been adopted on May 30, 2024 which provided for the sale of  up to 870,000 shares of Class A common stock underlying vested stock options with an expiration date of February 10, 2031 (and which plan initially had a duration of the earlier of August 25, 2025 or the completion of all transactions thereunder).

On March 28, 2025, 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), Kang Xu (our Chief Technology 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 granted to Dr. Hu, Ms. Nealis, Dr. Gan, Mr. Pilkington, Dr. Xu, and Mr. Li on March 28, 2025. 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, 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.
Stock options | Jing Nealis [Member]  
Trading Arrangements, by Individual  
Name Jing Nealis
Title Chief Financial Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date May 30, 2024
Rule 10b5-1 Arrangement Terminated true
Termination Date March 4, 2025
Expiration Date February 10, 2031
Aggregate Available 870,000
Restricted Stock Units (RSUs) | Jing Nealis [Member]  
Trading Arrangements, by Individual  
Name Jing Nealis
Title Chief Financial Officer
Restricted Stock Units (RSUs) | Qichao Hu [Member]  
Trading Arrangements, by Individual  
Name Qichao Hu
Title Founder, Chairman and Chief Executive Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date March 28, 2025
Restricted Stock Units (RSUs) | Hong Gan [Member]  
Trading Arrangements, by Individual  
Name Hong Gan
Title Chief Science Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date March 28, 2025
Restricted Stock Units (RSUs) | Kyle Pilkington [Member]  
Trading Arrangements, by Individual  
Name Kyle Pilkington
Title Chief Legal Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date March 28, 2025
Restricted Stock Units (RSUs) | Kang Xu [Member]  
Trading Arrangements, by Individual  
Name Kang Xu
Title Chief Technology Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date March 28, 2025
Restricted Stock Units (RSUs) | Gang Daniel Li [Member]  
Trading Arrangements, by Individual  
Name Gang “Daniel” Li
Title Chief Manufacturing Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date March 28, 2025
Restricted Stock Units (RSUs) | Executive Officers [Member]  
Trading Arrangements, by Individual  
Name Dr. Hu, Ms. Nealis, Dr. Gan, and Mr. Pilkington
Title Executive Officers
Rule 10b5-1 Arrangement Adopted true
Adoption Date March 28, 2025