0001805077 2025-10-01 2025-10-01 0001805077 1 2025-10-01 2025-10-01 0001805077 2 2025-10-01 2025-10-01 0001805077 1 2025-10-01 2025-10-01 0001805077 2 2025-10-01 2025-10-01 iso4217:USD pure shares S-3 S-3ASR EX-FILING FEES 0001805077 Eos Energy Enterprises, Inc. N/A true false S-3 Eos Energy Enterprises, Inc. false Equity Common stock, par value $0.0001 per share true 7326654 10.219 74871077.23 0.0001381 10339.70 false Equity Private Warrants true 224400 0.00 0.0001381 0.00 74871077.23 10339.70 0.00 12313.71 0.00 Consists of (i) up to 7,102,254 shares of common stock issuable upon exercise of the public warrants and (ii) up to 224,400 shares of common stock issuable upon exercise of the private warrants. Pursuant to Rule 457(c) under the Securities Act, and solely for the purpose of calculating the registration fee, the proposed maximum offering price per share is $10.219, which is the average of the high and low prices of the common stock on September 26, 2025 on the Nasdaq Global Market. Consists of the Registrant's warrants to purchase shares of common stock originally issued in connection with the initial public offering of B. Riley Principal Merger Corp. II. The registration fee with respect to the private warrants has been allocated to the underlying shares of the Registrant's common stock issuable upon exercise of such private warrants, as described in footnote (1). Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from share splits, share dividends or similar transactions. true Eos Energy Enterprises, Inc. S-3 333-263298 2022-03-04 12313.71 Equity Common stock, par value $0.0001 per share 132833996 132833996.00 true Eos Energy Enterprises, Inc. S-3 333-263298 2022-03-04 12313.71 On March 4, 2022, the Registrant filed a registration statement on Form S-3 (Registration No. 333-263298) (the "Prior S-3 Registration Statement"), and paid a filing fee of $12,313.71 in connection with the private warrants and shares of common stock underlying the warrants registered on the Prior S-3 Registration Statement. No warrants or shares of common stock underlying warrants were sold under the Prior S-3 Registration Statement. As a result, $12,313.71 (the "Unused S-3 Fees") in previously paid fees remain available for future offset. In accordance with Rule 457(p) under the Securities Act, the registrant hereby applies the Unused S-3 Fees to offset the filing fee payable in connection with this filing.