FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      
1. Name and Address of Reporting Person * B. Riley Financial, Inc. 2. Issuer Name and Ticker or Trading Symbol Eos Energy Enterprises, Inc. [ EOSE ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)_____ Director                    __X__ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)         (First)         (Middle)
11100 SANTA MONICA BLVD SUITE 800
3. Date of Earliest Transaction (MM/DD/YYYY)
8/24/2021
(Street)
LOS ANGELES, CA 90025
(City)       (State)       (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
8/27/2021 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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
Class A Common Stock  8/24/2021    S    94598  D $13.5253  8431  I  By B. Riley Securities, Inc. (1)(2)
Class A Common Stock  8/25/2021    S    8431  D $13.5546  0  I  By B. Riley Securities, Inc. (1)(2)
Class A Common Stock  8/25/2021    S    23521  D $13.5546  366479  I  By BRC Partners Opportunity Fund, LP (1)(2)
Class A Common Stock  8/26/2021    S    50000  D $13.8467  316479  I  By BRC Partners Opportunity Fund, LP (1)(2)
Class A Common Stock                 3871250  I  By B. Riley Principal Sponsor Co. II, LLC (1)(2)
Class A Common Stock                 2167000  I  By BRF Investments, LLC (1)(2)(3)
Class A Common Stock                 20000  D (4)  
Class A Common Stock                 5000  I  By Bryant R. Riley, as UTMA custodian for Charlie Riley (1)(2)
Class A Common Stock                 5000  I  By Bryant R. Riley, as UTMA custodian for Susan Riley (1)(2)
Class A Common Stock                 5000  I  By Bryant R. Riley, as UTMA custodian for Abigail Riley (1)(2)
Class A Common Stock                 5000  I  By Bryant R. Riley, as UTMA custodian for Eloise Riley (1)(2)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 of Derivative Security: 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
Warrants (right to buy)  $11.5                  5/22/2021  11/16/2025  Class A Common Stock  325000    325000  I  By B. Riley Principal Sponsor Co. II, LLC (1)(2)
Warrants (right to buy)  $11.5                  5/22/2021  11/16/2025  Class A Common Stock  25000    25000  I  By BRC Partners Opportunity Fund, LP (1)(2)

Explanation of Responses:
(1)  This Form 4 is being filed jointly by B. Riley Financial, Inc. ("BRF"), BRF Investments, LLC ("BRFI"), B. Riley Principal Sponsor Co. II, LLC (the "Sponsor"), B. Riley Principal Investments, LLC ("BRPI"), BRC Partners Opportunity Fund, LP ("BRPLP"), BRC Partners Opportunity Fund GP, LLC ("BRPGP"), B. Riley Capital Management, LLC ("BRCM"), B. Riley Securities, Inc. ("BRS"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP.
(2)  Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein.
(3)  Represents 2,167,000 shares of commons stock previously held directly by BRPI and subsequently transferred to BRFI.
(4)  Represents shares held directly by Bryant R. Riley.

Remarks:
This filing amends Form 4 filed on August 27, 2021 to reflect the addition of BRFI as a Reporting Owner and signatory hereto. BRFI had not yet obtained edgar access codes at the time of the prior Form 4 filing and has since obtained such codes.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
B. Riley Financial, Inc.
11100 SANTA MONICA BLVD SUITE 800
LOS ANGELES, CA 90025

X

BRF Investments, LLC
11100 SANTA MONICA BLVD SUITE 800
LOS ANGELES, CA 90025

X

B. Riley Principal Sponsor Co. II, LLC
299 PARK AVENUE 21ST FLOOR
NEW YORK, NY 10171

X

B. RILEY PRINCIPAL INVESTMENTS, LLC
11100 SANTA MONICA BLVD SUITE 800
LOS ANGELES, CA 90025

X

B. RILEY CAPITAL MANAGEMENT, LLC
11100 SANTA MONICA BLVD. SUITE 800
LOS ANGELES, CA 90025

X

BRC Partners Management GP, LLC
11100 SANTA MONICA BLVD SUITE 800
LOS ANGELES, CA 90025

X

BRC Partners Opportunity Fund, LP
11100 SANTA MONICA BLVD. SUITE 800
LOS ANGELES, CA 90025

X

B. Riley Securities, Inc.
11100 SANTA MONICA BLVD SUITE 800
LOS ANGELES, CA 90025

X

RILEY BRYANT R
11100 SANTA MONICA BLVD., SUITE 800
LOS ANGELES, CA 90025

X


Signatures
B. Riley Financial, Inc., by: /s/ Bryant R. Riley, Co-Chief Executive Officer 8/30/2021
**Signature of Reporting Person Date
BRF Investments, LLC., by: /s/ Phillip Ahn, Authorized Signatory 8/30/2021
**Signature of Reporting Person Date
B. Riley Principal Sponsor Co. II, LLC, by: /s/ Phillip Ahn, Authorized Signatory 8/30/2021
**Signature of Reporting Person Date
B. Riley Principal Investments, LLC, by: /s/ Kenneth Young, Chief Executive Officer 8/30/2021
**Signature of Reporting Person Date
B. Riley Capital Management, LLC, by: /s/ Bryant R. Riley, Chief Executive Officer 8/30/2021
**Signature of Reporting Person Date
BRC Partners Management GP, LLC, by B. Riley Capital Management, LLC, its sole member, by: /s/ Bryant R. Riley, Chief Executive Officer 8/30/2021
**Signature of Reporting Person Date
BRC Partners Opportunity Fund, L.P., by: /s/ Bryant R. Riley, Chief Investment Officer 8/30/2021
**Signature of Reporting Person Date
B. Riley Securities, Inc.., by: /s/ Andrew Moore, Chief Executive Officer 8/30/2021
**Signature of Reporting Person Date
/s/ Bryant R. Riley 8/30/2021
**Signature of Reporting Person Date
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