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Form 4 Eos Energy Enterprises, For: Aug 04 Filed by: Cerberus GP Manager LLC

August 6, 2026 5:16 PM
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person *
Cerberus GP Manager LLC
(Last) (First) (Middle)
875 THIRD AVENUE
11TH FLOOR
(Street)
NEW YORK NY 10022
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Eos Energy Enterprises, Inc. [ EOSE ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
08/04/2026
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Warrant (right to buy) $ 5.481 (3) 08/04/2026 A (1) (2) 20,017,772 (3) (3) Common Stock 20,017,772 (1) (2) 20,017,772 I See Footnotes (4) (5)
Explanation of Responses:
1. On August 4, 2026, Eos Energy Enterprises Inc. (the "Issuer"), CCM Frontier JV Holdco, LLC ("CCM Frontier"), and HBC MSF Capital Solutions Blocker II LLC, an affiliate of Hudson Bay Capital Management LP ("HBC"), consummated the closing of the funding of Frontier Power USA Parent, LLC (the "JV Company"), a joint venture among the Issuer, CCM Frontier and HBC. Pursuant to a Contribution and Warrants Purchase Agreement (the "Contribution and Warrants Purchase Agreement"), dated as of August 4, 2026, by and between CCM Frontier and the JV Company, CCM Frontier (i) caused the JV Company to receive the benefit of certain contracts, contacts, investment opportunities, subject matter expertise and other going concern value with respect to the Frontier power platform developed by affiliates of CCM Frontier and (ii) contributed cash and certain assets to the JV Company as detailed in the Contribution and Warrants Purchase Agreement.
2. (continued from footnote 1) In exchange therefor and for certain funds previously contributed by CCM Frontier to the JV Company, the JV Company (A) issued to CCM Frontier 50,000,001 Class A-1 Units of the JV Company and 100,000,000 Class A-2 Units of the JV Company and (B) sold and transferred to CCM Frontier warrants (the "JV Warrants") to purchase 20,017,772 shares of Common Stock of the Issuer that were previously contributed to the JV Company by the Issuer. The transfer of the JV Warrants to CCM Frontier was contemplated in the agreement governing the Issuer's contribution of the JV Warrants to the JV Company.
3. The JV Warrants are governed by that certain Warrant Agreement, dated as of August 4, 2026, by and between the Issuer and Continental Stock Transfer & Trust Company, as warrant agent (the "Warrant Agreement"). The JV Warrants are immediately exercisable at an exercise price of $5.481 per share of Common Stock and expire on the tenth anniversary of the date of issuance. The JV Warrants may be exercised for cash or on a cashless basis. The Issuer may lower the exercise price and extend the duration of the JV Warrants under certain conditions described in the Warrant Agreement. The Issuer has certain rights to redeem the JV Warrants beginning five years after the date of issuance of the JV Warrants under certain conditions described in the Warrant Agreement. The JV Warrants are subject to customary anti-dilution adjustments as described in the Warrant Agreement.
4. The securities of the Issuer reported herein are held directly by CCM Frontier. CCM Frontier Power USA Holdings, LP ("CCM Frontier LP") is the sole member of CCM Frontier. CCM Frontier Power USA Holdings GP, LLC ("CCM Frontier GP") is the general partner of CCM Frontier LP. Cerberus GP Manager LLC ("Cerberus GP Manager", and together with CCM Frontier, CCM Frontier LP, and CCM Frontier GP, the "Reporting Persons") is the sole member of CCM Frontier GP. Due to their relationships with CCM Frontier, CCM Frontier LP, CCM Frontier GP, and Cerberus GP Manager may be deemed to indirectly beneficially own the securities of the Issuer held directly by CCM Frontier. The Reporting Persons are affiliates of and may be deemed to be a Section 13(d) group with CCM Denali Equity Holdings, LP, CCM Denali Equity Holdings GP, LLC and Cerberus Capital Management II, L.P., each of which has previously filed Form 3 and Form 4 filings to report beneficial ownership of securities of the Issuer.
5. Each of CCM Frontier LP, CCM Frontier GP and Cerberus GP Manager disclaims beneficial ownership of the securities of the Issuer held directly by CCM Frontier except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that any of CCM Frontier LP, CCM Frontier GP or Cerberus GP Manager is the beneficial owner of such securities for purposes of Section 16 or any other purpose.
Remarks:
Nicholas P. Robinson and Nathaniel Fick, each an employee of an affiliate of the Reporting Persons, and David Urban are directors of Eos Energy Enterprises, Inc. (the "Issuer"). By virtue of their representation on the board of directors of the Issuer, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the Reporting Persons are deemed directors by deputization of the Issuer.
CERBERUS GP MANAGER LI.C By: /s/ Alexander D. Beniamin/Senior Managing Director 08/06/2026
** Signature of Reporting Person Date
CCM FRONTIER JV HOLDCO, LLC By: /s/ Jake Hansen/President 08/06/2026
** Signature of Reporting Person Date
CCM FRONTIER POWER USA HOLDINGS, LP By: /s/ Jake Hansen/President 08/06/2026
** Signature of Reporting Person Date
CCM FRONTIER POWER USA HOLDINGS GP, LLC By: /s/ Jake Hansen/President 08/06/2026
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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