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Related-Party Transactions
 3 Months Ended
Mar. 31, 2025
Related Party Transactions [Abstract]  
Related-Party Transactions

Note 15.  Related-Party Transactions

Pursuant to the director nomination agreement, dated as of July 12, 2021, with the Company (the “Director Nomination Agreement”), General Motors Company and its affiliates (“GM”) were considered related parties due to their board representation and the board member’s employment position at GM, which remained in effect as long as GM continues to hold more than 5% of the fully diluted outstanding equity securities of SES as per the agreement. On October 29, 2024, GM and the Company mutually agreed to terminate the Director Nomination Agreement and GM terminated its board representation. Hence, GM is no longer considered a related party during 2025.  See “Note 4 – Partnerships” for more details about our prior partnership with GM.