Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2025
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	Rule 10b5-1 Trading Plans Our directors and officers (as defined in Section 16 of the Exchange Act (“Section 16”)) may from time to time enter into plans for the purchase or sale of Eos stock that are intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act. During the three months ended September 30, 2025, the following Section 16 officers adopted new Rule 10b5-1 trading arrangements (as defined in Item 408(a) of Regulation S-K): •Joseph Mastrangelo, Chief Executive Officer and Director: Adopted a new Rule 10b5-1 trading plan on September 11, 2025. •Nathan Kroeker, Chief Commercial Officer and Interim Chief Financial Officer: Adopted a new Rule 10b5-1 trading plan on September 15, 2025. •Michael Silberman, Chief Legal Officer and Corporate Secretary: Adopted a new Rule 10b5-1 trading plan on September 15, 2025. •Sumeet Puri, Chief Accounting Officer: Adopted a new Rule 10b5-1 trading plan on September 12, 2025. The Rule 10b5-1 trading arrangements described above terminate on September 30, 2026 and provide for the sale of a predetermined percentage of each Section 16 officer’s restricted stock unit award vesting, sufficient to cover the tax liability for each such Section 16 officer. In addition, during the three months ended September 30, 2025, the following Section 16 officers terminated previously existing Rule 10b5-1 trading arrangements: •Nathan Kroeker, Chief Commercial Officer and Interim Chief Financial Officer: Terminated a prior Rule 10b5-1 trading plan on September 15, 2025. •Michael Silberman, Chief Legal Officer and Corporate Secretary: Terminated a prior Rule 10b5-1 trading plan on September 15, 2025.
Non-Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Terminated	false
Nathan Kroeker [Member]
Trading Arrangements, by Individual
Name	Nathan Kroeker
Title	Chief Commercial Officer and Interim Chief Financial Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 15, 2025
Expiration Date	September 30, 2026
Arrangement Duration	380 days
Sumeet Puri [Member]
Trading Arrangements, by Individual
Name	Sumeet Puri
Title	Chief Accounting Officer
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 12, 2025
Expiration Date	September 30, 2026
Arrangement Duration	383 days
Joseph Mastrangelo [Member]
Trading Arrangements, by Individual
Name	Joseph Mastrangelo
Title	Chief Executive Officer and Director
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 11, 2025
Expiration Date	September 30, 2026
Arrangement Duration	384 days
Michael Silberman [Member]
Trading Arrangements, by Individual
Name	Michael Silberman
Title	Chief Legal Officer and Corporate Secretary
Rule 10b5-1 Arrangement Adopted	true
Adoption Date	September 15, 2025
Expiration Date	September 30, 2026
Arrangement Duration	380 days
Michael Silberman Previous Existing Plan [Member] \| Michael Silberman [Member]
Trading Arrangements, by Individual
Name	Michael Silberman
Title	Chief Legal Officer and Corporate Secretary
Rule 10b5-1 Arrangement Terminated	true
Termination Date	September 15, 2025
Nathan Kroeker Previous Existing Plan [Member] \| Nathan Kroeker [Member]
Trading Arrangements, by Individual
Name	Nathan Kroeker
Title	Chief Commercial Officer and Interim Chief Financial Officer
Rule 10b5-1 Arrangement Terminated	true
Termination Date	September 15, 2025

Eos Energy Enterprises, Inc. 10-Q