Sec Form 4/A Filing - Singh Krishna Pal @ Eos Energy Enterprises, Inc. - 2021-02-11

FORM 4/A 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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Singh Krishna Pal 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 _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O EOS ENERGY ENTERPRISES, INC., 3920 PARK AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 02/11/2021 (Street) EDISON, NJ08820 4. If Amendment, Date Original Filed (MM/DD/YY) 02/11/2021 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Common Stock 02/11/2021 A 170,740 A 2,708,252 I See footnotes( 2 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Singh Krishna Pal C/O EOS ENERGY ENTERPRISES, INC. 3920 PA RK AVENUE EDISON, NJ08820 X Signatures Dr. Krishna Singh 03/30/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The 170,740 shares of common stock of the issuer reported on this Form 4 were distributed to the reporting persons as earnout consideration pursuant that certain agreement and plan of merger, dated September 7, 2020, by and among the issuer and the other parties signatory thereto. The earnout consideration was contingent upon the price per share of the issuer's common stock exceeding certain thresholds, which thresholds were achieved as of January 21, 2021. The issuer informed the reporting persons of the number of shares issuable pursuant to the earnout as of February 11, 2021. ( 2 )Represents securities held directly by Holtec International, Singh Real Estate Enterprises Inc., Tequesta Properties Inc. and HI-MED, LLC. Mr. Singh holds direct and/or indirect ownership of these entities and holds the full voting and dispositive power with respect to Holtec International, Tequesta Properties, Inc. and HI-MED, LLC.

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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