Eos Energy Enterprises Inc

Householding of Proxy Materials

The SEC has adopted rules that permit companies and intermediaries (e.g., brokers) to satisfy the delivery requirements for proxy statements with respect to two or more stockholders sharing the same address by delivering a single proxy statement addressed to those stockholders. This process, which is commonly referred to as “householding,” potentially means extra convenience for stockholders and cost savings for companies.

Brokers with account holders who are Eos stockholders may be “householding” our proxy materials. A single proxy statement may be delivered to multiple stockholders sharing an address unless contrary instructions have been received from the affected stockholders. Once you have received notice from your broker that it will be “householding” communications to your address, “householding” will continue until you are notified otherwise or until you notify your broker or the Company that you no longer wish to participate in “householding.”

If, at any time, you no longer wish to participate in “householding” and would prefer to receive a separate proxy statement, you may (1) notify your broker or (2) direct your written request to our Investor Relations Department at 3920 Park Avenue, Edison, New Jersey 08820, 862-207-7955 or email ir@eose.com. Stockholders who currently receive multiple copies of this Proxy Statement at their address and would like to request “householding” of their communications should contact their broker. In addition, the Company will promptly deliver, upon written request to the address below, a separate copy of the Proxy Statement and Proxy Card to a stockholder at a shared address to which a single copy of the documents was delivered.

If you have questions about the proposals or this Proxy Statement, would like additional copies of this Proxy Statement, or need to obtain proxy cards or other information related to the proxy solicitation, please contact Sodali, our proxy solicitor, by calling (800) 662-5200 (toll-free), or collect at (203) 658-9400 (for banks and brokers, or by emailing EOSE.info@investor.sodali.com. You will not be charged for any of the documents that you request.

Other Matters

As of the date of this Proxy Statement, the Board does not intend to present any matters other than those described herein at the Special Meeting and is unaware of any matters to be presented by other parties. If other matters are properly brought before the Special Meeting for action by the stockholders, proxies will be voted in accordance with the recommendation of the Board or, in the absence of such a recommendation, in the discretion of the proxy holder.

All requests should be directed our Investor Relations department at 3920 Park Avenue, Edison, New Jersey 08820,862-207-7955 or email ir@eose.com.