EOSE · Michelle Buczkowski, an officer of Eos Energy Enterprises, filed a Form…

Michelle Buczkowski, an officer of Eos Energy Enterprises, filed a Form 144 notice of intent to sell 50,000 shares of common stock, with an approximate market value of $95,250. The sale is intended to cover estimated tax withholding obligations from the vesting of restricted stock units and is conducted under a Rule 10b5-1 trading plan adopted on December 11, 2025.

• Reporting person: Michelle Buczkowski, an officer of Eos Energy Enterprises, Inc.
• Proposed sale of 50,000 shares of common stock.
• Approximate market value of shares: $95,250.
• Sale intended to cover estimated tax withholding obligations from RSU vesting.