Table of Contents

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

(Mark One)

xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended March 31, 2020

Or

oTRANSITION REPORT PURSUANT TO SECTION 13 2021

OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


o
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from to

Commission File Numberfile number 001-39291

EOS ENERGY ENTERPRISES, INC.

B. RILEY PRINCIPAL MERGER CORP. II
(Exact Namename of Registrantregistrant as Specifiedspecified in Its Charter)

its charter)
Delaware84-4290188

Delaware

08-7654321
(State or Other Jurisdictionother jurisdiction of

Incorporation incorporation or Organization)

organization)

(I.R.S. Employer

Identification No.)

2993920 Park Avenue 21st Floor

New York, New York

Edison

10171

NJ
08820
(Address of Principal Executive Offices)(Zip Code)

(212) 457-3300
(Registrant’s

(732) 225-8400
Registrant's telephone number, including area code)

code
N/A
(Former name, former address and former fiscal year, if changed since last report)
Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading Symbol(s)Name of each exchange on which registered
Common stock, par value $0.0001 per shareEOSEThe Nasdaq Stock Market LLC
Warrants, each exercisable for one share of common stockEOSEWThe Nasdaq Stock Market LLC
Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports),; and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  

o



Table of Contents
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes  x   No  

o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer”,filer,” “accelerated filer,”filer” and “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one)

:
Large accelerated filerAccelerated filer
Non-accelerated filerSmaller reporting company
Emerging growth company
Large accelerated fileroAccelerated filero
Non-accelerated filerxSmaller reporting companyx
Emerging growth companyx

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.     

o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).     Yes   o     No  

Securities registered pursuantx

APPLICABLE ONLY TO REGISTRANTS INVOLVED IN BANKRUPTCY
PROCEEDINGS DURING THE PRECEDING FIVE YEARS:
Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Section 12(b)12, 13 or 15(d) of the Act:

Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.
  Yes x No
APPLICABLE ONLY TO CORPORATE ISSUERS:
The registrant had outstanding 51,801,267 shares of common stock as of May 7, 2021.
Title of each classTrading Symbol(s)Name of each exchange on which registered
Units, each consisting of one share of Class A common stock and one-half of one redeemable warrantBMRG.UThe New York Stock Exchange
Class A common stock, par value $0.0001 per shareBMRGThe New York Stock Exchange
Warrants, each whole warrant exercisable to purchase one share of Class A common stock, each at an exercise price of $11.50 per shareBMRG WSThe New York Stock Exchange

As of June 24, 2020, there were 18,150,000 shares of the registrant’s Class A common stock, par value $0.0001 per share, and 5,031,250 shares of the registrant’s Class B common stock, par value $0.0001 per share, outstanding.


B. Riley Principal Merger Corp. II

Quarterly Report on Form 10-Q


Table of Contents
Page
Item 1.
1
2
3
4
5
Item 2.12
Item 3.14
Item 4.1a.Controls and ProceduresRisk Factors14
Item 1.Legal Proceedings15
Item 1A.Risk Factors15
Item 2.15
16
16
16
16
17

Part I - Financial Information













1

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
CONDENSED CONSOLIDATED BALANCE SHEETS ($ IN THOUSANDS)
As of March 31, 2021 and December 31, 2020

i

March 31,
2021
December 31,
2020
ASSETS  
Current assets  
Cash and cash equivalents$100,717 $121,853 
Grants receivable131 131 
Accounts receivable184 
Inventory92 214 
Vendor deposits4,144 2,390 
Notes receivable33 
Prepaid and other current assets2,090 2,779 
Total current assets107,391 127,367 
Property and equipment, net7,995 5,653 
Intangible assets, net310 320 
Investment in joint venture8,176 3,736 
Security deposits805 825 
Notes receivable, long term2,908100 
Other assets215263 
Total assets$127,800 $138,264 
LIABILITIES AND MEMBERS EQUITY (DEFICIT)
Current liabilities
Accounts payable and accrued expenses$8,939 $8,471 
Accounts payable and accrued expenses - related parties11,236 2,517 
Provision for firm purchase commitments1,585 
Capital lease, current portion11 11 
Long-term debt, current portion1,176 924 
Contract liabilities827 77 
Total current liabilities22,189 13,585 
Long term liabilities
Deferred rent773 762 
Capital lease
Long-term debt105 427 
Warrants liability2,925 2,701 
Total long term liabilities3,804 3,894 
Total liabilities25,993 17,479 
COMMITMENTS AND CONTINGENCIES (NOTE 8)
SHAREHOLDERS' EQUITY
 Common Stock, $0.0001 par value, 200,000,000 shares authorized, 51,801,267 and 48,943,082 shares outstanding at March 31, 2021 and December 31, 2020, respectively
Contingently Issuable Common Stock17,600 
Preferred stock, $0.0001 par value, 1,000,000 shares authorized, 0 shares outstanding at March 31, 2021 and December 31, 2020
Additional paid in capital415,569 395,491 
Accumulated deficit(313,767)(292,311)
Total shareholders' equity101,807 120,785 
Total liabilities and shareholders’ equity$127,800 $138,264 

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements.

B. RILEY PRINCIPAL MERGER CORP. II

Condensed Balance Sheets

  March 31,  December 31, 
  2020  2019 
  (Unaudited)    
Assets      
Current assets:      
Cash $14,894  $ 
Due from related party  1   1 
Total current assets  14,895   1 
Deferred offering costs  70,000    
Total assets $84,895  $1 
Liabilities and Stockholder's Deficit        
Current liabilities:        
Accounts payable and accrued offering costs $35,626  $278 
Note payable - related party  50,000    
Total liabilities  85,626   278 
         
Stockholder's deficit:        
Preferred stock, $0.0001 par value; 1,000,000 shares authorized; none issued and outstanding      
Class A Common stock, $0.0001 par value; 100,000,000 shares authorized; none issued and outstanding  issued and outstanding as of March 31, 2020 and December 31, 2019, respectively.      
Class B Common stock, $0.0001 par value; 25,000,000 shares authorized; 5,750,000 issued and outstanding  as of March 31, 2020 and December 31, 2019, respectively.  575   575 
Additional paid-in capital      
Accumulated deficit  (1,306)  (852)
Total stockholder's deficit  (731)  (277)
Total liabilities and stockholder's deficit $84,895  $1 

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

1

2


B. RILEY PRINCIPAL MERGER CORP. II

Condensed StatementTable of Operations

(Unaudited)

  Three 
  Months Ended 
  March 31,
2020
 
    
Formation, general and administrative expenses $454 
Net loss $454 
     
Basic loss per share $0.00 
Diluted loss per share $0.00 
     
Weighted average basic shares outstanding (1)  5,000,000 
Weighted average diluted shares outstanding (1)  5,000,000 

Contents
(1)Excludes an aggregate of 750,000 shares that are subject to forfeiture to
EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS ($ IN THOUSANDS)
For the extent that the underwriter’s over-allotment is not exercised in full (Note 4). On February 3,three months ended March 31, 2021 and 2020 the Company conducted a 1:575 stock split and reclassification for each share outstanding (Note 4).

 March 31,
2021
March 31,
2020
Revenue  
Total revenue$164 $
Costs and expenses
Cost of goods sold100 57 
Research and development expenses5,053 2,230 
General and administrative expenses16,654 2,359 
Grant expense, net346 
Total costs and expenses21,815 4,992 
Operating loss(21,651)(4,992)
Other income (expense)
Interest expense, net(21)(95)
Interest expense related party(3,715)
Change in fair value, embedded derivative(515)
Change in fair value, warrants liability(224)
Income (loss) from equity in unconsolidated joint venture440 (31)
Net loss$(21,456)$(9,348)
Basic and diluted loss per share attributable to common shareholders1
Basic$(0.42)$(2.38)
Diluted$(0.42)$(2.38)
Weighted average shares of Common Stock2
Basic51,126,863 3,930,336 
Diluted51,126,863 3,930,336 
The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.


B. RILEY PRINCIPAL MERGER CORP. II

Condensed Statement

1See Note 1 for discussion of Changes in Stockholder’s Deficit

(Unaudited)

        Additional     Total 
  Class B Common Stock  Paid-in  Accumulated  Stockholder's 
  Shares (1)  Amount  Capital  Deficit  Deficit 
Balance, January 1, 2020  5,750,000  $575  $  $(852) $(277)
Net loss           (454)  (454)
Balance, March 31, 2020  5,750,000  $575  $  $(1,306) $(731)

reverse capitalization given effect herein
2See Note 1 for discussion of reverse capitalization given effect herein
3

(1)Includes an aggregate of 750,000 shares that are subject to forfeiture to
EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (DEFICIT) ($ IN THOUSANDS)
For the extent that the underwriter’s over-allotment is not exercised in full (Note 4). On February 3,three months ended March 31, 2021 and 2020 the Company conducted a 1:575 stock split and reclassification for each share outstanding (Note 4).

Common Stock3AdditionalContingentlyAccumulatedTotal
SharesAmountPaid in capitalIssuable Common StockDeficit
Balance, December 31, 20193,930,336 $$20,346 $$(204,068)$(183,722)
Stock-based compensation— 19 — — 19 
Net loss— — — — (9,348)(9,348)
Balance, March 31, 20203,930,336 $$20,365 $$(213,416)$(193,051)
Balance, December 31, 202048,943,082��$$395,491 $17,600 $(292,311)$120,785 
Stock-based compensation— — 2,478 — — 2,478 
Release of Block B Sponsor Earnout Shares from restriction4859,000 — — — — — 
Issuance of Contingently Issuable Common Stock5
1,999,185 — 17,600 (17,600)— 
Net loss— — — — (21,456)(21,456)
Balance, March 31, 2021
51,801,267 $$415,569 $$(313,767)$101,807 

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

3

B. RILEY PRINCIPAL MERGER CORP. II

Condensed Statement

3See Note 1 for discussion of Cash Flows

(Unaudited)

  Three 
  Months Ended 
  March 31,
2020
 
Cash flows from operating activities:    
Net loss $(454)
Adjustments to reconcile net loss to net cash used in operating activities:    
Increase in deferred offering costs  (70,000)
Increase in accounts payable and accrued offering costs  35,348 
Net cash used in operating activities  (35,106)
Cash flows from financing activities:    
Proceeds from note payable - related party  50,000 
Net cash provided by financing activities  50,000 
Increase in cash  14,894 
Cash, beginning of year   
Cash, end of period $14,894 
     
Supplemental disclosures:    
Interest paid $ 
Taxes paid $ 

reverse capitalization given effect herein

4See Note 17 for discussion of Sponsor Earnout Shares
5See Note 17 for discussion of Contingently Issuable Common Stock
4

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS ($ IN THOUSANDS)
For the three months ended March 31, 2021 and 2020
 March 31, 2021March 31, 2020
Cash flows from operating activities  
Net loss$(21,456)$(9,348)
Adjustment to reconcile net loss to net cash used in operating activities
Stock-based compensation2,478 19 
Depreciation and amortization485 365 
Loss from disposal of property and equipment11 
Provision for firm purchase commitments(1,585)
Loss (income) from equity in unconsolidated joint venture(440)31 
Accreted interest on convertible notes payable related party3,715 
Change in fair value, embedded derivative515 
Change in fair value, warrants liability224 
Changes in operating assets and liabilities:
Receivable on sale of state tax attributes2,488 
Prepaid and other assets718 302 
Inventory122 
Accounts receivable(184)(66)
Vendor deposits(466)(239)
Security deposits20 28 
Accounts payable and accrued expenses843 1,254 
Accounts payable and accrued expenses-related parties8,719 705 
Contract liabilities750 (116)
Deferred rent11 29 
   Other assets47 (3)
Net cash used in operating activities(9,703)(321)
Cash flows from investing activities
Investment in notes receivable(2,870)
Investment in joint venture(4,000)(221)
Purchases of property and equipment(4,490)(1,358)
Net cash used in investing activities(11,360)(1,579)
Cash flows from financing activities
Capital lease payments(3)(8)
Proceeds from issuance of convertible notes payable related party1,407 
Repayment of other financing(70)
Issuance of contingently redeemable preferred units258 
Net cash provided by (used in) financing activities(73)1,657 
Net decrease in cash and cash equivalents(21,136)(243)
Cash and cash equivalents, beginning of year121,853 862 
Cash and cash equivalents, end of the period$100,717 $619 
Non-cash investing and financing activities
Accrued and unpaid capital expenditures$$23 
Supplemental disclosures
Cash paid for interest5195
The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.


5


Table of ContentsB. RILEY PRINCIPAL MERGER CORP. II

NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS

NOTE 1—ORGANIZATION AND NATURE OF BUSINESS OPERATIONS

Organization


EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)

1.Nature of Operations and General

Summary of Significant Accounting Policies

Nature of Operations
Eos Energy Enterprises, Inc. (f/k/a B. Riley Principal Merger Corp. IIII) (the “Company” or "Eos"), designs, develops, manufactures, and sells innovative energy storage solutions for the electric utilities, and commercial and industrial end users. Eos has developed and has received patents on an innovative battery design relying on a blank check company,unique zinc oxidation/reduction cycle to generate output current and to recharge. The Battery Management System (“BMS”) software uses proprietary Eos-developed algorithms and includes ambient and battery temperature sensors, as well as voltage and current sensors for the strings and the system. Eos and its partners focus on a collaborative approach to jointly develop and sell safe, reliable, long-lasting low-cost turn-key alternating current (“AC”) integrated systems using Eos’s direct current (“DC”) Battery System. The Company is also an investor in an unconsolidated joint venture (“JV”) which has the exclusive rights to manufacture the DC Battery Systems integrated with the BMS for DC Battery Systems that are sold and delivered in North America, subject to meeting certain performance targets. The Company’s primary markets focus on integrating battery storage solutions with (1) solar systems that are connected to the utility power grid (2) solar systems that are not connected to the utility power grid (3) storage systems utilized to relieve congestion and (4) storage systems to assist commercial and industrial customers in reducing their peak energy usage or participating in the utilities ancillary and demand response markets. The location of the Company’s major markets are seen in North America, Europe, Africa, and Asia.
Reverse Recapitalization
The Company was incorporated as a Delaware corporation on June 3, 2019. The Company is an emerging growth2019 as a publicly held special purpose acquisition company as defined(“SPAC”) in Section 2(a) of the Securities Act of 1933, as amended, (the “Securities Act”), as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). The Company was formed for the purpose of effectingorder to acquire, through a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses (an “Initial Business Combination”businesses. On November 16, 2020 (the" Merger Date").

As of March 31, 2020,, the Company had not commenced any operations. All activity of the Company includes the activity of the Company from inception and activity relatedconsummated a reverse recapitalization (the "Merger") pursuant to the initial public offering (the “Public Offering”) described below. The Company will not generate any operating revenues until after completion of its Initial Business Combination, at the earliest. The Company will generate non-operating income in the form of interest income on cash and cash equivalents from the proceeds derived from the Public Offering described below. The Company has selected December 31st as its fiscal year end.

Public Offering

The Company completed the sale of 17,500,000 units (the “Units”) at an offering price of $10.00 per Unit in the Public Offering on May 22, 2020.which B. Riley Principal Sponsor Co.Merger Corp. II ("BMRG") acquired Eos Energy Storage LLC pursuant to an agreement and plan for merger (the “Sponsor”“Merger Agreement”), between the Company, BMRG Merger Sub, LLC, our wholly-owned subsidiary and a Delaware limited liability company and a(“Merger Sub I”), BMRG Merger Sub II, LLC, our wholly-owned indirect subsidiary of B. Riley Financial, Inc. (“B. Riley Financial”), purchased an aggregate of 650,000 Units at a price of $10.00 per Unit (the “Private Placement Units”) in a private placement that closed on May 22, 2020 simultaneously with the Public Offering. The sale of the 17,500,000 Units in the Public Offering (the “Public Units”) generated gross proceeds of $175,000,000, less underwriting commissions of $3,500,000 (2% of the gross proceeds of the Public Offering) and other offering costs of $561,189. The Private Placement Units generated $6,500,000 of gross proceeds.

Each Unit consists of one share of the Company’s Class A common stock, $0.0001 par value (each a “public share”), and one-half of one redeemable warrant, with each whole warrant exercisable for one share of Class A common stock (each, a “Warrant” and, with respect to the warrants underlying the Private Placement Units, the “Private Placement Warrants” and, collectively, the “Warrants”). One Warrant entitles the holder thereof to purchase one whole share of Class A common stock at a price of $11.50 per share.

The Company has also granted the underwriters a 45-day option to purchase up to 2,625,000 additional Units at the Public Offering price less the underwriting discounts.On May 28, 2020, the underwriters confirmed that they will not be exercising their over-allotment option in whole or in part.

Sponsor and Note Payable - Related Party

On February 4, 2020, the Sponsor agreed to loan the Company up to $300,000 (see Note 3) to support the Company’s initial formation and operations. At March 31, 2020, the Note Payable balance was $50,000. On April 21, 2020, the Company borrowed an additional $50,000 which increased the Note Payable balance to $100,000 which was paid in full using proceeds from the Public Offering and the Private Placement.

The Trust Account

Upon completion of the Public Offering, $176,750,000 of proceeds were held in the Company’s trust account at J.P. Morgan Chase Bank, N.A., with Continental Stock Transfer & Trust Company acting as trustee (the “Trust Account”) and will be invested in permitted United States “government securities” within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, which we refer to as the Investment Company Act, having a maturity of 185 days or less or in money market funds meeting certain conditions under Rule 2a-7 promulgated under the Investment Company Act that invest only in direct U.S. government treasury obligations.. Unless and until the Company completes the Initial Business Combination, it may pay its expenses only from the net proceeds of the Public Offering and the Private Placement held outside the Trust Account, which was $1,284,805 on May 22, 2020, of which $100,000 was used to pay the Note Payable to Sponsor and $523,135 was used to pay the offering costs.

Except with respect to interest earned on the funds held in the Trust Account that may be released to the Company to pay its taxes, the proceeds from the Public Offering may not be released from the Trust Account until the earliest of: (i) the completion of the Initial Business Combination; (ii) the redemption of any public shares properly submitted in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation to modify the substance or timing of the Company’s obligation to redeem 100% of its public shares if it does not complete the Initial Business Combination by November 22, 2021, 18 months from the closing of the Public Offering; or (iii) the redemption of all of the Company’s public shares if the Company is unable to complete the Initial Business Combination by November 22, 2021, 18 months from the closing of the Public Offering (at which such time up to $100,000 of interest shall be available to the Company to pay dissolution expenses), subject to applicable law. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the holders of the Company’s public shares (the “public stockholders”).

5

Initial Business Combination

The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Public Offering, although substantially all of the net proceeds of the Public Offering and the Private Placement are intended to be generally applied toward consummating an Initial Business Combination. The Initial Business Combination must occur with one or more businesses or assets with a fair market value equal to at least 80% of the assets held in the Trust Account. There is no assurance that the Company will be able to successfully effect an Initial Business Combination.

The Company will provide its public stockholders with the opportunity to redeem all or a portion of their shares upon the completion of the Initial Business Combination, either (i) in connection with a stockholder meeting called to approve the business combination or (ii) by means of a tender offer. However, in no event will the Company redeem its public shares in an amount that would cause its net tangible assets to be less than $5,000,001.

If the Company holds a stockholder meeting to approve the Initial Business Combination, a public stockholder will have the right to redeem its public shares for an amount in cash equal to its pro rata share of the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of the Initial Business Combination, including interest but less taxes payable. As a result, such shares of Class A common stock have been recorded at redemption amount and classified as temporary equity upon the completion of the Public Offering, in accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 480, “Distinguishing Liabilities from Equity.”

Pursuant to the Company’s amended and restated certificate of incorporation, if the Company is unable to complete the Initial Business Combination by November 22, 2021, 18 months from the closing of the Public Offering, the Company will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but no more than ten business days thereafter redeem the public shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account including interest earned on the funds held in the Trust Account and not previously released to the Company to pay franchise and income taxes (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding public shares, which redemption will completely extinguish public stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining stockholders and the Company’s board of directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. There will be no redemption rights or liquidating distributions with respect to the Company’s warrants, which will expire worthless if the Company fails to complete the Initial Business Combination within 18 months of the closing of the Public Offering.

The Sponsor and the Company’s officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to waive their rights to liquidating distributions from the Trust Account with respect to any Founder Shares and Private Placement Shares (as defined below) held by them if the Company fails to complete the Initial Business Combination within 18 months of the closing of the Public Offering. However, if the Sponsor or any of the Company’s directors or officers acquires shares of Class A common stock in or after the Public Offering, they will be entitled to liquidating distributions from the Trust Account with respect to such public shares if the Company fails to complete the Initial Business Combination within the prescribed time period.

In the event of a liquidation, dissolution or winding up of the Company after an Initial Business Combination, the Company’s remaining stockholders are entitled to share ratably in all assets remaining available for distribution to them after payment of liabilities and after provision is made for each class of stock, if any, having preference over the common stock. The Company’s stockholders have no preemptive or other subscription rights. The Company will provide its stockholders with the opportunity to redeem their public shares for cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account, under the circumstances, and, subject to the limitations, described herein.

Letter Agreement

The Company’s Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed, among other things (a) to waive their redemption rights with respect to any Founder Shares, Private Placement Shares and any Public Shares held by them in connection with the completion of the Initial Business Combination, (b) to waive their redemption rights with respect to their Founder Shares, Private Placement Shares and public shares in connection with a stockholder vote to approve an amendment to the Company’s amended and restated certificate of incorporation to modify the substance or timing of its obligation to redeem 100% of its public shares if it does not complete an Initial Business Combination within 18 months from the closing of the Public Offering and (c) to vote their Founder Shares and any Public Shares purchased during or after the Public Offering (including in open market and privately negotiated transactions) in favor of the Initial Business Combination.

6

Forward Purchase Agreement

B. Riley Principal Investments, LLC (“BRPI”), a Delaware limited liability company an affiliate(“Merger Sub II”), Eos Energy Storage LLC, a Delaware limited liability company (“EES”), New Eos Energy LLC, a wholly-owned subsidiary of EES and a Delaware limited liability company (“Newco”) and AltEnergy Storage VI, LLC, a Delaware limited liability company (“AltEnergy”).

In connection with the Merger, (1) Merger Sub I merged with and into Newco (the “First Merger”), whereupon the separate existence of Merger Sub I ceased, and Newco continued as the surviving company (such company, in its capacity as the surviving company of the Sponsor enteredFirst Merger, is sometimes referred to as the “First Surviving Company”) and became our wholly owned subsidiary; and (2) immediately following the First Merger and as part of the same overall transaction as the First Merger, the First Surviving Company merged with and into a forward purchase agreement (the “Forward Purchase Agreement”) withMerger Sub II, whereupon the separate existence of the First Surviving Company to provide forceased, and Merger Sub II continued as the purchase by it (or its designees) of an aggregate of 2,500,000 Units at $10.00 per Unit (the “Forward Purchase Units”) for an aggregate purchase price of $25,000,000 in a private placement to close concurrently withsurviving company and our wholly owned subsidiary. Upon the closing of the Initial Business Combinationbusiness combination (the “Forward Purchase”“Closing”). The obligations under the Forward Purchase Agreement do not depend on whether any public stockholders redeem their Class A common stock and provide, the Company withchanged its name to “Eos Energy Enterprises, Inc.”
Since BMRG was a minimum funding level fornon-operating public shell company, the Initial Business Combination. The Forward Purchase Agreement includes registration rights with respect to the Forward Purchase Units.

The proceeds from the salecurrent shareholders of EES have a relative majority of the Forward Purchase Units may be used as partvoting power of the consideration tocombined entity, the sellers in the Initial Business Combination, to pay expenses in connection with the Initial Business Combination or for working capital in the post-Business Combination company. The Forward Purchase will be required to be made regardlessoperations of whether any Class A common stock is redeemed by the Company’s public stockholders and is intended to provide the Company with a minimum funding level for the Initial Business Combination. The purchaser will not have the ability to approve the Initial Business CombinationEES prior to the signingacquisition comprises the only ongoing operations of the combined entity, and senior management of EES comprises the majority of the senior management of the combined entity, the Mergers have been accounted for as a material definitive agreement. The Forward Purchase Units will be issued only in connectioncapital transaction rather than a business combination. According to ASC 805 Business combination, the transaction was accounted for as a reverse recapitalization consisting of the issuance of Common Stock by Eos for the net monetary assets of BMRG accompanied by a recapitalization. Accordingly, the net monetary assets received by EES as a result of the Merger with B. Riley have been treated as a capital infusion on the closing date. No goodwill or other intangible assets were recorded during the Merger. The consolidated assets, liabilities and results of the Initial Business Combination.

NOTE 2 — SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The financial statementsoperations of the Company are the historical financial statements of EES and the BMRG assets, liabilities and results of operations are consolidated with the Company beginning on the acquisition date. In order to reflect the change in capitalization, the historical capitalization related to EES common units has been retroactively restated based on the exchange ratio as if shares of B. Riley Common Stock had been issued as of the later of (i) the issuance date of the shares, or (ii) the earliest period presented in conformity with accounting principles generally accepted in the United Statesaccompanying consolidated financial statements.

6

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
1.Nature of Operations and Summary of Significant Accounting Policies (cont.).

Section 102(b)(1)

Upon consummation of the JOBS Act exempts emerging growth companies from being requiredMerger, the former EES convertible notes and redeemable preferred units were converted to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Securities Exchange Act of 1934, as amended) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt outcommon stock of the extended transition periodCompany.
Unless the context otherwise requires, the use of the terms “the Company”, “we,” “us,” and comply with“our” in these notes to the requirements that applyunaudited condensed consolidated financial statements refers to non-emerging growth companies but any such an election to opt out is irrevocable. Eos Energy Enterprises, Inc. and its consolidated subsidiaries.
Basis of Presentation
The Company has elected not to opt outunaudited condensed financial statements include the accounts of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard.

This may make comparison of the Company’s financial statement with another public company which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

The Company’s unaudited condensed interim financial statementsand its 100% owned direct and indirect subsidiaries and have been prepared in accordance with U.S. GAAPgenerally accepted accounting principles (“GAAP”). All intercompany transactions and balances have been eliminated in the preparation of the consolidated financial statements. These statements reflect all adjustments, consisting of normal recurring adjustments, which, in the opinion of management, are necessary for fair presentation of the information contained therein. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) have been condensed or omitted pursuant to the rules and regulations of the SEC for interim financial informationU.S. Securities and the instructions to Form 10-Q. Accordingly, the financial statements do not include all of the information and footnotes required by U.S. GAAP. In the opinion of management, all adjustments considered for a fair presentation have been included. Operating results for the three months ended March 31, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020 or any other period. The accompanyingExchange Commission. These unaudited condensed interimconsolidated financial statements should be read in conjunction with the Company’s audited financial statements and notes thereto included in the Company’s prospectus filedAnnual Report on Form 10-K of the Company for the year ended December 31, 2020. These interim results are not necessarily indicative of results for the full year.

Reclassification of Prior Year Presentation
Certain prior year amounts have been reclassified for consistency with the SECcurrent year presentation. These reclassifications had no effect on May 20,the reported results of operations. Adjustment has been made to the Consolidated Balance sheets for the year ended December 31, 2020, to reclassify notes receivable from other assets.
Recent Accounting Pronouncements
In December 2019, the FASB issued Accounting Standards Update No. 2019-12 – Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes, as well aspart of its initiative to reduce complexity in the Company’s audited balance sheet statementaccounting standards. The amendments in ASU 2019-12 eliminate certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and notes theretothe recognition of deferred tax liabilities for outside basis differences. ASU 2019-12 also clarifies and simplifies other aspects of the accounting for income taxes. The Company has adopted this ASU in Q1 2021. The adoption did not have an impact on the Company's consolidated financial statements.
2. Revenue Recognition
Contract Balances
The following table provides information about contract liabilities from contracts with customers:
 March 31,
2021
December 31,
2020
March 31,
2020
December 31,
2019
Contract Liabilities$827 $77 $184 $300 
Contract liabilities primarily relate to advance consideration received from customers in advance of the Company satisfying performance obligations under contractual arrangements. Contract balances are reported in a net contract asset or liability position on a contract-by-contract basis at the end of each reporting period.
Contract liabilities increased $750 during the three months ended March 31, 2021 and decreased by $116 during the three months ended March 31, 2020, respectively. The Company recognized $0 of revenue during the three months ended March 31, 2021 and March 31, 2020 that was included in the Company’s Form 8-K filed withcontract liability balance at the SEC on May 28, 2020.

Loss Per Common Share

The Company complies with accounting and disclosure requirements of ASC Topic 260, “Earnings Per Share.” Net loss per common share is computed by dividing net loss by the weighted average number of common shares outstanding for the period, excluding shares of common stock subject to forfeiture. Net loss per common share is computed by dividing net gain/(loss) applicable to common stockholders by the weighted average number of common shares outstanding during the period, plus, to the extent dilutive, the incremental number of shares of common stock to settle warrants, as calculated using the treasury stock method. At March 31, 2020, the Company did not have any dilutive securities and other contracts that could, potentially, be exercised or converted into common stock and then share in the earningsbeginning of the Company under the treasury stock method. As a result, diluted loss per common share is the same as basic loss per common share for the periods. In February 2020, the Company completed a stock splitperiod.

Transaction Price Allocated to Remaining Performance Obligations
Contract liabilities of 1 to 575 shares of Class B common stock, resulting in 5,750,000 shares of Class B common stock issued and outstanding. The financial statements have been retroactively adjusted to reflect the stock split for all periods presented.


Cash and Cash Equivalents

The Company considers all short-term investments with an original maturity date of three months or less when purchased to be cash equivalents. The Company did not have any cash equivalents$827 as of March 31, 2020 and December 31, 2019.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash accounts in a financial institution, which, at times, may exceed the Federal Depository Insurance Coverage of $250,000. The Company has not experienced losses on these accounts and management believes the Company is not exposed to significant risks on such accounts.

Fair Value of Financial Instruments

The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “Fair Value Measurement,” approximates the carrying amounts represented in the balance sheet, primarily due to their short-term nature.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Deferred Offering Costs

The Company complies with the requirements of the FASB ASC 340-10-S99-1 and SEC Staff Accounting Bulletin Topic 5A — “Expenses of Offering.” Deferred offering costs of $35,000 as of March 31, 2020, consisted principally of costs incurred in connection with preparation for the Public Offering. The total offering costs incurred by the Company in connection with the Public Offering was $561,189. These costs and the underwriter discount, of $3,500,000, were charged to capital upon completion of the Public Offering on May 22, 2020.

Income Taxes

The Company is included in the consolidated tax return of B. Riley Financial (the “Parent”). The Company calculates the provision for income taxes by using a “separate return” method. Under this method the Company is assumed to file a separate return with the tax authority, thereby reporting its taxable income or loss and paying the applicable tax to, or receiving the appropriate refund from, the Parent. The Company’s current provision is the amount of tax payable or refundable on the basis of a hypothetical, current year, separate return.

Any difference between the tax provision (or benefit) allocated to the Company under the separate return method and payments to be made by (or received from) the Parent for tax expense are treated as either dividends or capital contribution. Accordingly, the amount by which the Company’s tax liability under the separate return method exceeds the amount of tax liability ultimately settled as a result of using incremental expenses of the Parent is periodically settled as a capital contribution from the Parent to the Company.

The Company complies with the accounting and reporting requirements of ASC Topic 740 “Income Taxes,” which requires an asset and liability approach to financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed for differences between the financial statement and tax bases of assets and liabilities that will result in future taxable or deductible amounts, based on enacted tax laws and rates applicable to the periods in which the differences2021 are expected to affect taxable income. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized.

ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized a tax position must be more likely than not to be sustained upon examination by taxing authorities. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. within the next twelve months.

7

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
3. Inventory
As of March 31, 20202021 and December 31, 2019, there2020, we had inventories of $92 and $214, respectively.

4. Property and Equipment, net
As of March 31, 2021 and December 31, 2020, property and equipment, net consisted of the following:
 20212020Useful lives
Equipment$8,293 $7,055 510 years
Capital Lease201 201 5 years
Furniture276 211 510 years
Leasehold Improvements2,732 2,732 Lesser of useful life/remaining lease
Tooling2,033 523 23 years
Total13,535 10,722 
Less: Accumulated Depreciation and Amortization(5,540)(5,069)
 $7,995 $5,653 
Depreciation and amortization expense related to property and equipment was $475 and $355 during the three months ended March 31, 2021 and 2020, respectively. Depreciation and amortization expenses recorded in cost of sales, research and development and general and administrative expenses were no unrecognized tax benefits and no amounts accrued for interest and penalties. The Company is currently not aware of any issues under review that could result in significant payments, accruals or material deviation from its position.


The Company may be subject to potential examination by federal, state and city taxing authorities in the areas of income taxes. These potential examinations may include questioning the timing and amount of deductions, the nexus of income among various tax jurisdictions and compliance with federal, state and city tax laws. The Company’s management does not expect that the total amount of unrecognized tax benefits will materially change over the next twelve months.

There was no provision for income taxes$111, $220, $144 for the three months ended March 31, 2020.

Following changes in ownership on May 22,2021 and 0, $270, $81 for the three months ended March 31, 2020, respectively.

5. Intangible Assets
Intangible assets consist of various patents valued at $400, which represents the cost to acquire the patents. These patents are determined to have useful lives and are amortized into the results of operations over ten years. During the three months ended March 31, 2021 and 2020, the Company deconsolidated from the Parentrecorded amortization expenses of $10 for tax purposes. Beginning May 22, 2020, the Company files separate corporate federal and state and local income tax returns. 

Unrecognized Tax Benefits

The Company recognizes tax positions in its financial statements only when it is more likely than not that the position will be sustained on examination by the relevant taxing authority based on the technical meritseach period related to patents.

Estimated future amortization expense of the position. A position that meets this standard is measured at the largest amount of benefit that will more likely than not be realized on settlement. A liability is established for differences between positions taken in a tax return and amounts recognized in the financial statements. There were no unrecognized tax benefitsintangible assets as of March 31, 2020.2021 are as follows:
Remainder of 2021$30 
202240 
202340 
202440 
202540 
Thereafter120 
Total$310 
6. Investment in unconsolidated joint venture
In August 2019, the Company entered into an agreement with Holtec Power, Inc. (“Holtec”) to form the unconsolidated joint venture HI-POWER LLC (“Hi-Power” or “JV”). The JV was formed in order to manufacture the products for all of the Company’s projects in North America. Accordingly, the Company recognizes accruedhas purchased battery storage systems and spare parts from the JV. The facility is located in Turtle Creek, Pennsylvania. The Company’s financial commitment to the JV upon inception was $4,100 in the form of a combination of cash and special purpose manufacturing equipment. The Company’s ownership interest and penalties related to unrecognized tax benefits as income tax expense. No amounts were accrued for interest expense and penalties related to income tax matters as of March 31, 2021 is 49%.
8

EOS ENERGY ENTERPRISES, INC.

UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
6. Investment in unconsolidated joint venture (cont.)
The joint venture commenced manufacturing activities in the fourth quarter of 2020. For the three months ended March 31, 2021 and 2020, contributions made to the JV were $4,000 and $221, respectively. The investment income (loss) recognized from the unconsolidated joint venture under the equity method of accounting was $440 and $(31) for the three months ended March 31, 2021 and 2020, respectively. Our investment in the unconsolidated joint venture as of March 31, 2021 and December 31, 2020 was $8,176 and $3,736, respectively.
On April 8, 2021, the Company entered into a unit purchase agreement (the “Purchase Agreement”) with Holtec. In accordance with the terms and conditions of the Purchase Agreement, on the closing date of April 9, 2021, the Company acquired from Holtec the entire 51% interest in Hi-Power that was not already owned by the Company. Following the consummation of the transactions set forth in the Purchase Agreement (the “Transactions”), Hi-Power became a wholly-owned subsidiary of the Company and the obligations of the parties under the Hi-Power joint venture terminated. The Purchase Agreement provided that the Company will pay an aggregate purchase price of $25 million dollars for the 51% interest in Hi-Power, with $5 million being paid on May 31, 2021, and the following four anniversaries thereof (subject to earlier required payment of the first installment in certain circumstances). In lieu of a cash payment at the closing of the Transactions, such purchase price obligations are evidenced by a secured promissory note with first priority position, issued by the Company to Holtec, and secured by the assets of the Company. The Purchase Agreement also requires that the Company pay to Holtec, on the closing of the Transactions, an amount in cash equal to approximately $10.2 million, which constitutes the return by the Company of certain contributions made by Holtec to Hi-Power.
7. Notes receivable and Variable interest entities (“VIEs”) consideration
Notes receivable consist primarily of amounts due to us related to the financing we offered to customers. We report notes receivable at the principal balance outstanding less an allowance for losses. We monitor the financial condition of the notes receivable and record provisions for estimated losses when we believe it is probable that the holders of the notes receivable will be unable to make their required payments. We charge interest at a fixed rate and interest income is calculated by applying the effective rate to the outstanding principal balance. The Company had notes receivable of $2,941 and $100 outstanding as of March 31, 2021 and December 31, 2020, respectively, with no loss reserved for the uncollectible balances.
The customers to whom we offer financing through notes receivables are VIEs. However, the Company is not a primary beneficiary, because we do not have power to direct the activities of the VIEs that most significantly impact the VIEs’ economic performance. The VIEs are not consolidated into the Company’s financial statements but rather disclosed in the notes to our financial statements under ASC 810-10-50-4. The maximum loss exposure is limited to the carrying value of notes receivable as of the balances sheet dates.
At March 31, 2021, we had agreements to provide loan commitments to our customers for $11,348. $2,970 was drawn on that commitment as of March 31, 2021. The funding under certain loan agreements is contingent on reaching certain milestones defined by the agreements.
8. Commitments and Contingencies
Lease Commitments
On June 24, 2016, Eos entered into a long-term non-cancelable, operating lease for 45,000 sq. ft. of space for our current headquarters facility in Edison, New Jersey. On April 26, 2017, Eos entered into a lease for an additional 18,000 sq. ft. of adjoining space. These leases expire in September 2026 with renewal options up to 2036. Further, these leases require monthly rent payments along with executory costs, which include real estate taxes, repairs, maintenance, and insurance. In addition, the terms of the leases contain cost escalations of approximately 10% annually. The Company also has certain non-cancelable capital lease agreements for office equipment.
Total rent expense was $228 for the three months ended March 31, 2021 and 2020, respectively, of which, $184 and $135 were recorded as Research and development expenses; and $44 and $93 as General and administrative expenses in the Statement of Operations, respectively.
9

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
8. Commitments and Contingencies (cont.)
Future minimum lease commitments as of March 31, 2021 are as follows:
 OperatingCapital
Remainder of 2021$518 $11 
2022755 
2023825 
2024895 
2025966 
Later years679 
Total minimum lease payments$4,638 $12 
Less amounts representing interest
Present value of minimum lease payments$12 
Firm Purchase Commitments — Related Party
In July 2020, the Company entered into an $8,000 non-cancellable purchase contract with our unconsolidated joint venture partner, Hi-Power LLC, to supply batteries for existing and future sales orders. As of March 31, 2021, the Company has made purchases totaling $7,705, resulting in a remaining purchase commitment of $295 as of March 31, 2021 under this contract.
At the end of each reporting period, the Company evaluates its non-cancellable firm purchase commitments and records a loss, if any, using the same lower of cost or market approach. In assessing the potential loss provision, we use the stated contract price and expected production volume under the relevant sales contract. The Company records a purchase commitment loss if the market selling price of Gen 2.3 Battery Systems sold to customers is less than the cost to manufacture the product.
During the three months ended March 31, 2021 and 2020, the Company recorded 0 loss on firm purchase commitments and as of March 31, 2021 the remaining reserve is nil.
9. Grant Expense, Net
Eos was approved for 2 grants by the California Energy Commission (CEC) totaling approximately $7,000. In accordance with the grant agreements, Eos is responsible for conducting studies to demonstrate the benefits of certain energy-saving technologies to utility companies and consumers in the State of California, and is entitled to receive portions of the grants based upon expenses incurred. During the three months ended March 31, 2021 and 2020, Eos recorded grant expense, net of $8 and $346, respectively, which comprised of grant income of $329 and $0 and grant costs of $337 and $345. For the three months ended of March 31, 2021 and 2020, Eos has received 0 payments from the CEC. As of March 31, 2021 and December 31, 2020, the Company had $808 and $1,136 of deferred grant income, which were recorded in accounts payable and accrued expense on the Balance Sheets, as well as a receivable in the amount of $131. The expenses incurred by Eos relate to the performance of studies in accordance with the respective grant agreements, and the grants received or receivable from the CEC are recorded as an offset to the related expenses for which the grant is intended to compensate the Company.
10. Income Taxes
For the three months ended March 31, 2021 , the reported income tax provision was NaN and differs from the amount computed by applying the statutory US federal income tax rates of 21% to the income before income taxes due to pretax losses for which 0 tax benefit can be recognized, state and local taxes, and nondeductible expense for US income tax purposes.
For the three months ended March 31, 2020, the reported income tax provision was nil and differs from the amount computed by applying the statutory US federal income tax rates of 21% to the income before income taxes due to pretax losses for which no tax benefit can be recognized, state and local taxes, and nondeductible expenses for US income tax purposes.
10

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
10. Income Taxes (cont.)
The Company estimates and applies the annual effective tax rate to its ordinary earnings each interim period. Any significant unusual or infrequent items, if any, are not included in the estimation of the annual effective tax rate. Rather, these items and their related income tax expense (benefit) are separately stated in the interim period in which they occur. The quarterly estimate of the annual effective tax rate and related tax expense is subject to variation due to a multitude of factors. Factors may include but are not limited to the inability to accurately predict the Company’s pre-tax and taxable income and loss.
At each balance sheet date, management assesses the likelihood that Eos will be able to realize its deferred tax assets. Management considered all available positive and negative evidence in assessing the need for a valuation allowance. The realization of deferred tax assets depends on the generation of sufficient taxable income of the appropriate character and in the appropriate taxing jurisdiction during the future periods in which the related temporary differences become deductible. Management has determined that it is unlikely that Eos will be able to utilize its deferred tax assets at March 31, 2021 and March 31, 2020 due to cumulative losses. Therefore, Eos has a valuation allowance against its net deferred tax assets.
At March 31, 2021, Eos has unrecognized tax benefits associated with uncertain tax positions that, if recognized, would not affect the effective tax rate on income from continuing operations. Eos is not currently under examination by any taxing jurisdiction, and none of the uncertain tax positions is expected to reverse within the next 12 months.
At March 31, 2020 Eos has not recorded any unrecognized tax benefits associated with uncertain tax positions.
Eos files income tax examinationsreturns in federal and various state jurisdictions. The open tax years for federal and state returns is generally 2016 and forward. In addition, net operating losses generated in closed years and utilized in open years are subject to adjustment by majorthe tax authorities. Eos is not currently under examination by any taxing authorities since inception.

Recent Accounting Standards

Managementjurisdiction.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law in response to the Covid-19 pandemic. The CARES Act provided several forms of tax law changes, though Eos does not believeexpect that any recently issued, but not yet effective, accounting standards updates, if currently adopted, wouldwill have a material effectimpact on the tax provision.
11. Related Party Transactions
Convertible Notes Payable
During the three months ended March 31, 2020, Eos issued convertible notes payable to certain members. Refer to Note 12 for further discussion.
Management fee arrangement
During the three months ended March 31, 2020, Eos incurred monthly management fees to an entity owned by a board member in relation to the use of a New York City office. Total costs incurred during the three months ended March 31, 2020 were $19, which are included in General and administrative expense in the Statements of Operations.
Accounts Payable and Accrued Expenses
As of December 31, 2020, accounts payable and accrued expense-related parties contained $138 consultant fee payable to an affiliate. Additionally, payments accrued to Holtec under the Joint Venture agreement were $10,234 and $2,382 as of March 31, 2021 and December 31, 2020, respectively. $7,852 and $778 were charged to general and administrative expense for the three months ended March 31, 2021 and March 31, 2020 for payments to Holtec, respectively. This position also includes a $1,002 payable balance to Hi-Power as of March 31, 2021.
Vendor deposits
As of March 31, 2021 and December 31, 2020, vendor deposits included a balance of $0 and $278 for deposits made to Hi-Power, respectively.


11


EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
12. Convertible Notes Payable
During the three months ended March 31, 2020, the Company had Convertible notes payable — related party (the “Convertible Notes”) outstanding which includes Convertible Notes issued from February 2019 to May 2019 (“Phase I Note”), 2019 Phase II notes Convertible Notes issued from June 2019 to December 31, 2019 (“2019 Phase II Notes”), and Convertible Notes issued in 2020 (“2020 Phase II Notes”). The 2020 Phase II notes with aggregate principal of $833 (the “Convertible Notes”) were issued during the three months ended March 31, 2020. The Convertible Notes are secured by all assets and intellectual property of the Company. AltEnergy Storage Bridge, LLC (“AltEnergy”) and its affiliates have combined beneficial ownership in the Company exceeding 10% and therefore constitute a related party of the Company, pursuant to ASC 850, Related Parties. As of March 31, 2020 , AltEnergy owned approximately 20% of the Company’s financial statements.

NOTE 3 — RELATED PARTY TRANSACTIONS

Founder Shares

Common and Preferred Units.

The remaining note holders do not meet the definition of a related party under ASC 850. However, the Convertible Notes were issued to each of the note holders under identical terms, and AltEnergy serves as the administrative agent of all note holders under the Convertible Note agreements. Therefore, the disclosures within Note 12 encompass all of the Convertible Notes.
Concurrent to issuance of the 2019 and 2020 Phase II Notes, the Company entered into subscription agreements to sell Preferred Units to the Holders equal to the principal balance of the 2019 and 2020 Phase II Notes at a price of $0.50 per unit. The proceeds were allocated to the 2019 and 2020 Phase II Notes and Preferred Units based on their relative fair values at the date of issuance.
During the three months ended March 31, 2020, the Company issued 2020 Phase II Notes, concurrently with Preferred Units to certain investors for aggregate cash proceeds of $1,666.
The proceeds were allocated to the 2020 Phase II Notes and Preferred Units based on their relative fair values at the date of issuance. During the three months ended March 31, 2020, the Company recognized $259 attributable to the 2020 Phase II Preferred Units, which was recorded as a discount against the 2020 Phase II Notes. $475 of the of the 2020 Phase II Notes were issued to AltEnergy.
Beneficial Conversion Features
The conversion option on the Phase I Notes generated a beneficial conversion feature (BCF). A BCF arises when a debt or equity security is issued with an embedded conversion option that is in the money at inception because the conversion option has an effective strike price that is less than the fair value of the underlying equity security at the commitment date. The Company recognized this BCF by allocating the intrinsic value of the conversion option to additional paid-in capital, which resulted in a discount on the Phase I Notes. The Company amortized the discount into interest expense on the commitment date, as the conversion option is immediately exercisable.
Embedded Derivatives
Both the occurrence of a Qualified Financing and the exercise of the holders’ put options represent contingent events outside the Company’s control that can accelerate repayment of the Convertible Notes. Therefore, these features constitute embedded derivatives that require bifurcation pursuant to ASC 815-15, Embedded Derivatives.
During the three months ended March 31, 2020, embedded derivative liabilities with initial fair value of $126 was recognized. These amounts were recorded as discounts on the Convertible Notes. During the three months ended March 31, 2020, a change in fair value of embedded derivative loss of $515 has been recognized.
The Company accounted for the Convertible Notes as deeply discounted 0 coupon debt instruments. The balances payable at maturity reflect liquidation multiples of 3.0, 6.0, and 6.0 times the stated face value of the Phase I Note and Phase II Notes, respectively. The following balances were recognized upon issuance of the Convertible Notes during the three months ended March 31, 2020:

12

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
12. Convertible Notes Payable (cont.)
 March 31, 2020
 Phase IPhase IITotal
Convertible notes payable$40,587 $40,970 $81,557 
Discount, original issuance(20,946)(27,313)(48,259)
Premium (discount), embedded derivative181 (1,271)(1,090)
Discount, fair value of preferred units(2,290)(2,290)
Discount, beneficial conversion features(1,799)(1,799)
Convertible notes payable, net$18,023 $10,096 $28,119 
During the three months ended March 31, 2020, the Company recognized aggregate interest expense of $3,715 related to the Convertible Notes.
In connection with the business combination on November 16, 2020, the convertible notes were then exchanged for the common stock of the Company per the “Conversion upon Qualified Financing” term in the convertible note agreement. 10,886,300 shares of common stock were issued to the notes holders based on the liquidation amount of $108.9 million as of the Merger date and purchase price of $10 per shares agreed upon in the Merger agreement.
13. Long-term Debt
The following is a summary of the Company’s long-term indebtedness:
 March 31,
2021
December 31,
2020
Paycheck Protection Program loan payable$1,257 $1,257 
Other24 94 
Total1,281 1,351 
Less: Long-term debt, current portion(1,176)(924)
Long-term debt$105 $427 
Paycheck Protection Program
On June 3, 2019, 10,000April 7, 2020, the Company received $1,257 related to its filing under the Paycheck Protection Program and Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”). The payment terms of the note are as follows:
No payments during the deferral period, which is defined as the ten-month period beginning eight weeks after the cash from the loan was received.
Commencing one month after the expiration of the deferral period, and continuing on the same day of each month thereafter until the maturity date, the Company shall pay to JPMorgan Chase Bank, N.A. (the “Lender”), monthly payments of principal and interest, each in such equal amount required to fully amortize the principal amount outstanding on the note on the last day of the deferral period by the maturity date (twenty-four months from the date of the note, or April 7, 2022).
On the maturity date, the Company shall pay the Lender any and all unpaid principal plus accrued and unpaid interest plus interest accrued during the deferral period.
The Company may prepay this note at any time without payment of any premium.
13

EOS ENERGY ENTERPRISES, INC
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
13. Long-term Debt (cont.)
The Lender is participating in the Paycheck Protection Program to help businesses impacted by the economic impact from COVID-19. Forgiveness of this loan is only available for principal that is used for the limited purposes that qualify for forgiveness under the Small Business Administration’s (the “SBA”) requirements. To obtain forgiveness, the Company must request it and must provide documentation in accordance with the Small Business Administration (the “SBA”) requirements, and certify that the amounts the Company is requesting to be forgiven qualify under those requirements. As of the date of this report, the Company has applied for forgiveness of the loan which is dependent upon approval of the SBA.
14. Contingently Redeemable Preferred Units
During the three months ended March 31, 2020, the Company had outstanding Series C, Series D, and 2019-2020 Bridge Preferred Units, which were issued at $1.10, $1.75, and $0.50 per unit, respectively. The activity attributable to the Preferred Units was as follows:
 Preferred Units
 UnitsAmount
Balance, December 31, 201980,707 $109,365 
Contributions allocated to preferred units1,666 259 
Balance, March 31, 202082,373 $109,624 

In connection with the Merger on November 16, 2020, the Preferred Units were converted to 255,523,120 EES common units. 14,727,844 shares of the Company's common stock were issued to the EES PreferredUnits holders.
15. Warrants liability
The Company’s outstanding warrants (the "Warrants") were issued by BMRG in connection with its initial public offering on May 22, 2020. Upon consummation of the Merger on November 16, 2020, the Public Warrants and Private Placement Warrants will become exercisable on May 22, 2021 for shares of the Company’s common stock were issuedwith the same terms and exercise provisions prior to B. Riley Principal Investments, LLC.the Merger. The Private Placement Warrants meet the definition of a derivative. On February 3, 2020,the basis of the SEC Division of Corporation Finance’s April 12, 2021 Public Statement-Staff Statement on Accounting and Reporting Considerations for Warrants Issued by Special Purpose Acquisition Companies (“SPACS”), the Private Placement Warrants do not meet the scope exception as prescribed by ASC 815-40, Derivatives and Hedging—Contracts in Entity’s Own Equity. Accordingly, the Company conducted a 1:575 stock split and reclassification, resulting in B. Riley Principal Investments, LLC holding 5,750,000 shares of Class B common stock (the “Founder Shares”). Allrecognized the Private Placement Warrants as of the Founder SharesMerger Date on November 16, 2020 at fair value and classified them as a liability in the Company’s consolidated balance sheet. Thereafter, changes in fair value are recognized in earnings as a derivative gain (loss) in the Company’s consolidated Statement of Operations.
The Private Placement Warrants are classified as Level 2 financial instruments in the fair value hierarchy. They are valued on the basis of the quoted price of the Public Warrants, adjusted for insignificant difference between the Public Warrants and Private Placement Warrants. 325,000 Private Placement Warrants were contributedoutstanding with a fair value of $2,925 and $2,701 as of March 31, 2021 and December 31, 2020, respectively. The change in fair value for the three months ended March 31, 2021 amounted to $224 and has been recognized as a derivative loss in the Sponsor in January 2020. The financial statements reflectCompany’s consolidated Statement of Operations for the three months ended March 31, 2021.

16. Stock-Based Compensation
Since 2012, Eos has issued stock options to employees and certain service providers under the 2012 Eos Equity Incentive Plan (“2012 Plan”). In addition to stock options, the 2012 Plan provides for the issuance of these shares retroactively for all periods presented. On April 21, 2020, 20,000 Founder Shares were transferred to eachother forms of Patrick Bartels, Jamie Kempner, Timothy Presuttistock-based compensation, including profit interests, unit appreciation rights and Robert Suss, the Company’s independent directors, at their par value. On May 19, 2020, the Sponsor returned 718,750 shares of Class B common stock to Company for cancellation, resulting in a total of 5,031,250 Founder Shares outstanding. As used herein, unless the context otherwise requires, Founder Shares shall be deemed to include the shares of Class A common stock issuable upon conversion thereof. The Founder Shares are identicalrestricted units. Subsequent to the Class A common stock included in the Units sold in the Public Offering, the Founder Shares will automatically convert into shares of Class A common stock at the timeclosing of the Initial Business Combination and are subject to certain transfer restrictions, as described in more detail below, and the holders of the Founder Shares, as described in more detail above, have agreed to certain restrictions and will have certain registration rights with respect thereto. Up to 656,250 Founder Shares were subject to forfeiture depending on the extent to which the underwriters’ over-allotment option to purchase additional Units was exercised. On May 28, 2020, the underwriters confirmed that they will not be exercising their over-allotment option in whole or in part, as such 656,250 Founder Shares have been forfeited. The number of Founder Shares issued was determined based on the expectation that the Founder Shares would represent 20% of the outstanding shares of Company common stock upon completion of the Public Offering excluding the shares underlying the Private Placement Units (the “Private Placement Shares”).

The Company’s initial stockholders, officers and directors have agreed, subject to limited exceptions, not to transfer, assign or sell any Founder Shares held by them until the earlier to occur of: (i) one year after the completion of the Initial Business Combination, (ii) the last sale price of Class A common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the Initial Business Combination, or (iii) the date following the completion of the Initial Business Combination on whichMerger, the Company completes a liquidation, merger, stock exchange, reorganization or other similar transaction that results in all ofapproved the public stockholders having the right to exchange their2020 Equity Incentive Plan (the “2020 Incentive Plan”) and reserved 6,000,000 shares of common stock for cash, securities or other property.

Business Combination Marketing Agreement

Pursuant to a business combination marketing agreement,issuance thereunder. In 2021, the Company engaged B. Riley FBR, Inc. as advisors in connection with its Initial Business Combination to assist it in arranging meetings with its stockholders to discuss a potential business combination andreserved additional 498,021 shares for the target business’ attributes, introduce it to potential investors that may be interested in purchasing its securities, assist it in obtaining stockholder approval for its Initial Business Combination and assist it with the preparation of press releases and public filings in connection with the Initial Business Combination.2020 Incentive Plan. The Company will pay B. Riley FBR, Inc. for such services2020 Incentive Plan became effective immediately upon the consummationClosing of the Initial Business Combination a cash fee in an amount equal to 3.5%Merger and all equity granted under the 2012 Plan were converted into equivalent equity under the 2020 Incentive Plan. As of the gross proceeds of the Public Offering (exclusive of any applicable finders’ fees which might become payable). Pursuant to the terms of the business combination marketing agreement, no fee will be due if the Company does not complete an Initial Business Combination.

9

Administrative Fees

Commencing on May 19,March 31, 2021 and December 31, 2020, the Company agreedhas stock options and restricted units issued under the 2020 Incentive Plan.

14

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
16. Stock-Based Compensation (cont.)
The following table summarizes stock option activity during the three months ended March 31, 2021:
 UnitsWeighted-Average
Exercise Price
Weighted-Average
Remaining
Contractual Term
(years)
Options Outstanding at December 31, 20202,143,636 $9.19 9.5
Granted44,798 $17.46 
Cancelled/Forfeited(5,713)$11.46 
Options Outstanding at March 31, 20212,182,721 $9.35 9.3
Options Exercisable at March 31, 2021719,773 $9.08 9.3
A summary of Restricted Units (RU) activity during the three months ended March 31, 2021 under our 2020 Incentive Plan is as follows:
 UnitsWeighted-Average
Grant-Data Fair Value
RU Outstanding at January 1, 202142,318$13.46 
Granted1,111,500$20.02 
RU Outstanding at March 31, 20211,153,818 $19.78 
As of March 31, 2021 and December 31, 2020, 3,442,206 and 4,094,770 shares remain for future issuance, respectively. Options vest generally over three to pay an affiliatefive years and have a term of five to ten years. During the three months ended March 31, 2021 and 2020, the Company granted stock options with both service and performance conditions. Stock compensation is recognized on a straight-line basis over the requisite service period of the Sponsor a total of $10,000 per month for office space, utilities and secretarial and administrative support. Upon completion ofaward, which is generally the Initial Business Combination oraward vesting term. For awards with performance conditions, compensation expense is recognized using an accelerated attribution method over the Company’s liquidation, it will cease paying these monthly fees.

Registration Rights

vesting period. The holders of Founder Shares (and any shares of Class A common stock issuable upon conversion of the Founder Shares), Private Placement Units, Private Placement Shares, Private Placement Warrants (and any shares of Class A common stock issuable upon the exercise of the Private Placement Warrants) and any securities that may be issued upon conversion of working capital loans, if any, have registration rights to require the Company to register the resale of any of its securities held by them (in the case of the Founder Shares, only after conversion of such shares to shares of Class A common stock) pursuant to a registration rights agreement. The holders of the majority of these securities are entitled to make up to three demands, excluding short form demands, that the Company register such securities. These holders are also entitled to certain piggyback registration rights with respect to registration statements filed subsequentperformance conditions primarily relate to the completion of project milestones, achievement of operational certifications, and the Initial Business CombinationCompany’s closing of financing rounds.

The Company recorded stock compensation expense of $2,478 for the three months ended March 31, 2021 which includes $954 from RUs and rights$1,524 from stock options, respectively. $19 of stock compensation was recorded for stock option for the three months ended March 31, 2020. The stock compensation has been recorded in cost of sales, research & development expense and general and administrative expenses in the Statements of Operations. Unrecognized stock compensation expenses amount to require the Company$28,049 and include $21,774 attributable to register for resale such securities pursuantRUs and $6,275 attributable to Rule 415 under the Securities Act. However, the registration rights agreement provides that the Company will not permit any registration statement filed under the Securities Act to become effective until termination of the applicable lock-upstock option. The weighted average vesting period for the securities to be registered. The Company will bear the expenses incurred in connection with the filingstock options and RUs was 2.4 years and 2.7 years as of any such registration statements. Notwithstanding the foregoing, the Sponsor may not exercise its demand and piggyback registration rights after five and seven years, respectively, after the effective date of the registration statement of which this prospectus forms a part and may not exercise its demand rights on more than one occasion. The Forward Purchase Units and securities underlying the Forward Purchase Units have substantially similar registration rights.

Note Payable - Related Party

The Company had a Note Payable to the Sponsor which allowed the Company to borrow up to $300,000 without interest to be used for a portion of the expenses associated with the Public Offering. The Note Payable was payable on the earlier of: (i) December 31, 2019 or (ii) the date on which the Company consummated an initial public offering of its securities. At March 31, 2020,2021, respectively.

The weighted average assumptions used to determine the Note Payable balance was $50,000. On April 21, 2020,fair value of options granted in the Company borrowed an additional $50,000 which increased the Note Payable balance to $100,000 which was paid in full using proceeds from the Public Offering and the Private Placement on May 27, 2020.

NOTE 4 — STOCKHOLDER’S EQUITY

Common Stock

The authorized common stock of the Company includes up to 100,000,000 shares of Class A common stock and 25,000,000 shares of Class B common stock. If the Company enters into an Initial Business Combination, it may (depending on the terms of such an Initial Business Combination) be required to increase the number of shares of Class A common stock which the Company is authorized to issue at the same time as the Company’s stockholders vote on the Initial Business Combination, to the extent the Company seeks stockholder approval in connection with the Initial Business Combination. Holders of the Company’s common stock are entitled to one vote for each share of common stock. On February 3, 2020, the Company conducted a 1:575 stock split and reclassification resulting in 5,750,000 shares of Class B common stock outstanding (up  to 750,000 shares of which are subject to forfeiture depending on the extent to which the underwriters’ over-allotment option is exercised) atthree months ended March 31, 2021 and 2020 are as follows:

 20212020
Volatility57.43 %50.00 %
Risk free interest rate1.11 %0.49 %
Expected life (years)6.256.25
Dividend yield%%
The weighted average grant date fair value of all options granted was $9.49 and December$2.08 per option for the three months ended March 31, 2019. On April 21, 2020, 80,000 founder shares were transferred to the Company’s independent directors, at their par value.  On May 19, 2020, 718,750 shares2021 and 2020.
17. Shareholders’ Equity
Preferred Shares
15

The Company is authorized to issue 1,000,000 shares of preferred stock with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s boardBoard of directors.Directors. At March 31, 20202021 and December 31, 2019,2020, there were no0 shares of preferred stock issued or outstanding.


Common Stock

Warrants

Warrants may only be exercised

The Company is authorized to issue 200,000,000 shares of common stock with $0.0001 par value. Holders of the Company’s common stock are entitled to 1 vote for each share. At March 31, 2021 and December 31, 2020, there were 51,801,267 and 48,943,082 common stocks issued and outstanding.

Contingently Issuable Common Stock
Following the closing of the Merger, and as additional consideration for the transaction, the Company was obligated to issue within five years from the closing date to each unitholder of EES its pro-rata proportion of a one-time issuance of an aggregate of 2,000,000 Shares (the “Earnout Shares” or "Contingently Issuable Common Stock"), within 5 business days after (i) the closing share price of the Company's shares traded equaling or exceeding $16.00 per share for any 20 trading days within any consecutive 30-trading day period during the Earnout Period or (ii) a Change of Control (or a definitive agreement providing for a whole numberChange of shares. No fractional WarrantsControl having been entered into) during the Earnout Period (each of clauses (i) and (ii), a “Triggering Event”).
On January 22, 2021, the Triggering Event for the issuance of the Earnout Shares occurred as the Company's stock price exceeded $16.00 per share for 20 trading days within a consecutive 30-trading day period during the Earnout Period. Accordingly, 1,999,185 Shares were issued to the unitholders of EES.
Sponsor Earnout shares
Pursuant to the Sponsor Earnout letter signed in connection with the Merger, 1,718,000 shares of common stock issued and outstanding held by BMRG ("Sponsor Earnout Shares") were subject to certain transfer and other restrictions, under which (a) 859,000 Sponsor Earnout Shares ("Block A Sponsor Earnout Shares") are restricted from being transferred unless and until either, for a period of five years after the Closing, (i) the share price of our common stock equals or exceeds $12.00 per share for any 20 trading days within any consecutive 30-trading day period or (ii) a change of control occurs for a share price equaling or exceeding $12.00 per share, and (b) the remaining 859,000 Sponsor Earnout Shares ("Block B Sponsor Earnout Shares") are subject to similar restrictions except that the threshold is increased from $12.00 to $16.00. If after the five year period, there are no triggering events, the Sponsor Earnout Shares will be issued upon separationforfeited and canceled for no consideration. If after the five year period, only the triggering event described in clause (a) above has occurred, the remaining 859,000 Sponsor Earnout Shares described in clause (b) will be forfeited and canceled for no consideration.
On January 22, 2021, as the Company's stock price exceeded $16.00 per share for 20 trading days within a consecutive 30-trading day period, Block B Sponsor Earnout Shares was released from restriction.
Warrants
The Company sold warrants to purchase 9,075,000 shares of the UnitsCompany's common stock in the public offering and onlythe private placement on May 22, 2020. One warrant entitles the holder to purchase 1 whole share of common stock at a price of $11.50 per share. At March 31, 2021 and December 31, 2020, there were 8,750,000 Public Warrants will trade. The Warrantsoutstanding recorded as equity, which will become exercisable on May 22, 2021.








16


EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)

18. Revision of Previously Reported Consolidated Financial Statements as of and for the lateryear ended December 31, 2020

On April 12, 2021, the SEC Division of (a) 30 days after the completionCorporation of Finance released Staff Statement on Accounting and Reporting Considerations for Warrants Issued by Special Purpose Acquisition Companies (“SPACs”) (the “Statement”). Upon review and analysis of the Initial Business Combination or (b) 12 months from the closing of the Public Offering; provided in each caseStatement, management determined that the Company has an effective registration statement under the Securities Act covering the shares of Class A common stock issuable upon exercise of the Warrants and a current prospectus relating to them is available (or the Company permits holders to exercise their Warrants on a cashless basis and such cashless exercise is exempt from registration under the Securities Act). The Company will as soon as practicable, but in no event later than 15 business days, after the closing of the Initial Business Combination, use its best efforts to file with the Securities and Exchange Commission (“SEC”) a registration statement for the registration, under the Securities Act, of the shares of Class A common stock issuable upon exercise of the Warrants, to cause such registration statement to become effective within 60 business days after the closing of the Initial Business Combination and to maintain a current prospectus relating to those shares of Class A common stock until the Warrants expire or are redeemed, as specified in the Company’s warrant agreement. If the shares issuable upon exercise of the Warrants are not registered under the Securities Act by the 60th business day after the closing of the Initial Business Combination, the Company will be required to permit holders to exercise their Warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption. Notwithstanding the above, if the Company’s Class A common stock is at the time of any exercise of a Warrant not listed on a national securities exchange such that it satisfies the definition of a “covered security” under Section 18(b)(1) of the Securities Act, the Company may, at its option, require holders of Warrants who exercise their Warrants to do so on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act and, in the event the Company elects, the Company will not be required to file or maintain in effect a registration statement, but the Company will use its best efforts to register or qualify the shares under applicable blue sky laws to the extent an exemption is not available.

The Warrants will expire at 5:00 p.m., New York City time, five years after the completion of a Business Combination or earlier upon redemption or liquidation.

The Private Placement Warrants are identical toissued in connection with BMRG's IPO on May 22, 2020 (see Notes 1 and Note 15) do not meet the Warrants underlying the Units sold in the Public Offering, except thatscope exception from derivative accounting prescribed by ASC 815-40. Accordingly, the Private Placement Warrants should have been recognized by the Company at fair value as of the November 16, 2020 Merger Date and classified as a liability, rather than equity in the sharesCompany’s previously reported consolidated balance sheet as of Class A common stock issuable upon exerciseDecember 31, 2020. Thereafter, the change in fair value of the outstanding Warrants should have been recognized as a derivative gain (loss) each reporting period in the Company’s consolidated Statement of Operations. The fair value of the Private Placement Warrants will not be transferable, assignable or salable until 30 days after the completionas of the Initial Business Combination, subjectMerger Date on November 16, 2020 and December 31, 2020 amounted to certain limited exceptions. Additionally,$559 and $2,701, respectively.


The change in fair value from the Private Placement Warrants will be non-redeemable so longMerger Date on November 16, 2020 through December 31, 2020 amounted to $2,142 and has been recognized as they are held bya derivative loss in the SponsorCompany’s consolidated Statement of Operations for the year ended December 31, 2020. Management concluded the effect of this error is not quantitatively or its permitted transferees. Ifqualitatively material on the Private Placement Warrants are held by someone other thanCompany’s previously reported consolidated financial statements as of and for the Sponsor or its permitted transferees, the Private Placement Warrants will be redeemable byyear ended December 31, 2020. However, the Company has elected to correct the impact of this immaterial error in the accompanying Condensed Consolidated Balance Sheet as of December 31, 2020 and exercisableCondensed Consolidated Statement of Shareholders’ Equity for the three months ended March 31, 2021 by such holders on the same basisincreasing previously reported Accumulated Deficit and decreasing Additional Paid-In Capital by $2,142 and $559, respectively and increasing Warrants liability by $2,701 as the Warrants.

The Company may call the Warrants for redemption (except with respectof December 31, 2020.

In addition to the Private Placement Warrants):

·in whole and not in part;

·at a price of $0.01 per warrant;

·upon a minimum of 30 days’ prior written notice of redemption (the “30-day redemption period”); and

·if, and only if, the last sale price of the Class A common stock equals or exceeds $18.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within a 30-trading day period ending on the third trading day prior to the date on which the Company sends the notice of redemption to the warrant holders.

Ifcorrection noted above, the Company calls the Warrants for redemption,identified and has elected to correct certain other errors that originated in 2020 which management will have the option to require all holders that wish to exercise the Warrants to do so on a “cashless basis,” as described in the warrant agreement.

The exercise price and number of shares of Class A common stock issuable upon exercise of the Warrants may be adjusted in certain circumstances including in the event of a share dividend,has concluded are not quantitatively or recapitalization, reorganization, merger or consolidation. In addition, if (x) the Company issues additional shares of Class A common stock or securities convertible into or exercisable or exchangeable for shares of Class A common stock for capital raising purposes in connection with the closing of the Initial Business Combination (excluding any issuance of securities under the forward purchase agreement), at an issue price or effective issue price of less than $9.20 per share of Class A common stock (with such issue price or effective issue price to be determined in good faith by the Company’s board of directors and, in the case of any such issuance to the Sponsor or its affiliates, without taking into account any Founder Shares held by the Sponsor or such affiliates, as applicable, prior to such issuance (the “Newly Issued Price”)), (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for funding the Initial Business Combination, and (z) the volume weighted average trading price of the Class A common stock during the 20 trading day period starting on the trading day prior to the day on which the Company consummates the Initial Business Combination (the “Market Value”) is below $9.20 per share, the exercise price of the Warrants will be adjusted (to the nearest cent) to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price described above will be adjusted (to the nearest cent) to be equal to 180% of the higher of the Market Value and the Newly Issued Price. Additionally, in no event will the Company be required to net cash settle any Warrant. In the event that a registration statement is not effective for the exercised Warrants, the purchaser of a Unit containing such Warrant will have paid the full purchase price for the Unit solely for the share of Class A common stock underlying such Unit. There will be no redemption rights or liquidating distributions with respect to the Warrants, which will expire worthless if the Company fails to complete an Initial Business Combination within the 18-month time period.

NOTE 5 — SUBSEQUENT EVENTS

The Company evaluates subsequent events and transactions that occur after the balance sheet date up to the date that the financial statements were issued. Other than described in these financial statements in relationqualitatively material to the Company’s Initial Public Offeringpreviously reported consolidated financial statements as of and for the transactionyear ended December 31, 2020. The nature of these other errors pertains to immaterial reconciling adjustments in certain of the Company’s accounts payable and financing account balances as of December 31, 2020. Accordingly, the accompanying Condensed Consolidated Balance Sheet as of December 31, 2020 and Condensed Consolidated Statement of Shareholders’ Equity for the three months ended March 31, 2021 have been revised to give effect to the correction of these other errors by decreasing previously reported Accounts payable and accrued expenses by $390, reclassifying $147 from Long Term Debt, Current Portion, to Long Term Debt, decreasing Contingently Issuable Common Stock by $344, increasing Additional Paid-In Capital by $137, and decreasing Accumulated Deficit by $597 as of December 31, 2020.


The following tables reflect the impact of the correction of all of the above errors on June 24,the Company’s previously reported consolidated financial statements as of and for the year ended December 31, 2020 described below,(in thousands, except per share amounts):






17

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
18. Revision of Previously Reported Consolidated Financial Statements as of and for the Company did not identify any subsequent events that would have required adjustment or disclosureyear ended December 31, 2020 (cont.)
As of December 31, 2020
As Originally ReportedWarrants adjustmentsOther Immaterial adjustmentsAs Revised
Consolidated Balance Sheet
Current liabilities
Accounts payable and accrued expenses8,861 (390)8,471 
Long term debt, current portion1,071 (147)924 
Total current liabilities14,122 (537)13,585 
Long term liabilities
Long term debt280 147 427 
Warrants liability2,701 2,701 
Total long term liabilities1,046 2,701 147 3,894 
Total liabilities15,168 2,701 (390)17,479 
Shareholders' equity
Contingently Issuable Common Stock17,944 (344)17,600 
Additional paid in capital395,913 (559)137 395,491 
Accumulated deficit(290,766)(2,142)597 (292,311)
Total shareholders' equity123,096 (2,701)390 120,785 
Total liabilities, contingently redeemable preferred units, and shareholders’ equity138,264 138,264 

For the three months ended March 31, 2021
As Originally ReportedWarrants adjustmentsOther Immaterial adjustmentsAs Revised
Condensed Consolidated Statements of Shareholders' Equity (Deficit)
Balance, December 31, 2020
Additional Paid in Capital395,913 (559)137 395,491 
Contingently Issuable Common Stock17,944 (344)17,600 
Accumulated Deficit(290,766)(2,142)597 (292,311)
Total123,096 (2,701)390 120,785 
18

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
18. Revision of Previously Reported Consolidated Financial Statements as of and for the year ended December 31, 2020 (cont.)
For the year ended December 31, 2020
As Originally ReportedWarrants adjustmentsOther Immaterial adjustmentsAs Revised
Consolidated Statement of Operations
Costs and expenses
Research and development expenses13,983 (390)$13,593 
Total costs and expenses39,288 (390)$38,898 
Operating loss(39,069)390 $(38,679)
Other income (expense)
Change in fair value, Sponsor Earnout Shares(8,083)(137)$(8,220)
Change in fair value, warrants liability(2,142)$(2,142)
Net loss(68,754)(2,142)253 $(70,643)
Basic and diluted loss per share attributable to common shareholders
Basic$(7.31)$(0.23)$0.03 $(7.51)
Diluted$(7.31)$(0.23)$0.03 $(7.51)

19

EOS ENERGY ENTERPRISES, INC.
UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)
18. Revision of Previously Reported Consolidated Financial Statements as of and for the year ended December 31, 2020 (cont.)
For the year ended December 31, 2020
As Originally ReportedWarrants adjustmentsOther Immaterial adjustmentsAs Revised
Consolidated Statements of Shareholders' Equity (Deficit)
Additional Paid in Capital
Net equity infusion from the Merger126,024 (559)215 125,680 
Reclassification of Block B Sponsor earnout shares11,760 (78)11,682 
Balance, December 31, 2020395,913 (559)137 395,491 
Contingently Issuable Common Stock
Contingently Issuable Common Stock17,944 (344)17,600 
Balance, December 31, 202017,944 (344)17,600 
Accumulated Deficit
Contingently Issuable Common Stock(17,944)344 (17,600)
Net loss(68,754)(2,142)253 (70,643)
Balance, December 31, 2020(290,766)(2,142)597 (292,311)
Total Shareholders' Equity (Deficit)
Net equity infusion from the Merger126,026 (559)215 125,682 
Reclassification of Block B Sponsor earnout shares11,760 (78)11,682 
Net loss(68,754)(2,142)253 (70,643)
Balance, December 31, 2020123,096 (2,701)390 120,785 


For the year ended December 31, 2020
As Originally ReportedWarrants adjustmentsOther Immaterial adjustmentsAs Revised
Consolidated Statements of Cash Flows
Cash flows from operating activities
Net loss(68,754)(2,142)253(70,643)
Adjustment to reconcile net loss to net cash used in operating activities
Change in fair value, Sponsor Earnout Shares8,083 137 8,220 
Change in fair value, warrants liability2,142 2,142 
Changes in operating assets and liabilities:
Accounts payable and accrued expenses1,709 (390)1,319 
Net cash used in operating activities(26,559)(26,559)

20

EOS ENERGY ENTERPRISES, INC
UNAUDITED CONSOLIDATED CONDENSED FINANCIAL STATEMENTS
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS ($ IN THOUSANDS)

19. Subsequent Events
On April 8, 2021, EES entered into a unit purchase agreement to acquire 51% interest in the financial statements.

On June 24, 2020, the Company executed a letter of intent with privately held Eos Energy Storage LLC (“EOS”) for a business combination transaction which would result in privately held EOS becoming a publicly listed company. Founded in 2008, EOS is an established provider of long-duration energy storage focused on providing a domestic solution to a global need: low-cost, safe, and environmentally friendly energy storage.Hi-Power from Holtec. The transaction contemplates a valuationwas closed on April 9, 2021. Refer to Note 6 for further discussion.



21

Table of EOS of approximately $290,000,000. The proposed transaction would provide EOS with approximately $225,000,000 of additional new equity financing, including $50,000,000 of proceeds from a fully backstopped private placement of private equity by B. Riley Financial, assuming no public shareholders of the Company exercise their redemption rights at closing. The proposed transaction is expected to be completed in the fourth quarter of 2020, subject to, among other things, the negotiation and execution of a definitive agreement providing for the transaction, the approval by the Company’s shareholders, satisfaction of the conditions stated in the letter of intent and other customary closing conditions. Accordingly, there can be no assurance that a definitive agreement will be entered into or that the proposed transaction will be consummated.

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

References in this Quarterly Report on Form 10-Q (this “Quarterly Report”) to “we,” “us,” “our” or the “Company” are to B. Riley Principal Merger Corp. II. References to our “management” or our “management team” refer to our officers and directors.

FINANCIAL CONDITION AND RESULTS OF OPERATIONS
The following discussion and analysis should be read in conjunction with the accompanying unaudited financial statements for the three months ended March 31, 2021 and 2020 and our unaudited condensedannual report on Form 10-K for the year ended December 31, 2020, including the financial statements and related notes thereto included elsewhere in this Quarterly Report.

thereto.

Forward-Looking Statements

Information May Prove Inaccurate


This Quarterly Report includes forward-lookingreport contains statements about the future, sometimes referred to as “forward-looking” statements. All statements, other than statements of historical fact included in this Quarterly Report including, without limitation, statements in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations” regarding the Company’s financial position, business strategy and the plans and objectives of management for future operations, are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “should,” “could,” “would,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “continue,” or the negative of such terms or other similar expressions. We have based these forward-looking statements on our current expectations and projections about future events. Forward-looking statements are subject to knowntypically identified by the use of the words “believe,” “may,” “could,” “should,” “expect,” “anticipate,” “estimate,” “project,” “propose,” “plan,” “intend,” and unknownsimilar words and expressions. Statements that describe our future strategic plans, goals, or objectives are also forward-looking statements.

Readers of this report are cautioned that any forward-looking statements, including those regarding our management’s current beliefs, expectations, anticipations, estimations, projections, proposals, plans, or intentions, are not guarantees of future performance or results of events and involve risks uncertainties and assumptions about usuncertainties. The forward-looking information is based on present circumstances and on our predictions respecting events that have not occurred, that may not occur, or that may occur with different consequences from those now assumed or anticipated. Actual events or results may differ materially from those discussed in the forward-looking statements as a result of various factors. See also the “Risk Factors” disclosures
contained in our annual report on Form 10-K for the year ended December 31, 2020 for additional discussion of the risks and
uncertainties that could cause our actual results levels of activity, performance or achievements to bediffer materially different from any future results, levels of activity, performance or achievementsthose expressed or implied byin our forward-looking
statements. The forward-looking statements included in this report are made only as of the date of this report. We are not obligated to update such forward-looking statements. Factors that might causestatements to reflect subsequent events or contribute to such a discrepancy include, but are not limited to, those describedcircumstances.
Overview
We design, manufacture, and deploy reliable, sustainable, safe and scalable low-cost battery storage solutions for the electric utility industry.
The Company was originally incorporated in the Risk Factors section of our final prospectus for our Public Offering (as defined below) and in our other Securities and Exchange Commission (“SEC”) filings. Except as expressly required by applicable securities law, we disclaim any intention or obligation to update or revise any forward-looking statements whetherDelaware on June 3, 2019 as a result of new information, future events or otherwise.

Overview

We are a blank checkspecial purpose acquisition company incorporated as a Delaware corporation and formed forunder the purpose of effectingname B. Riley Principal Merger Corp. II., in order to acquire, through a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businessesbusinesses.

On November 16, 2020, the Company consummated the transactions contemplated by an Agreement and Plan of Merger (the “Initial Business Combination”“Merger Agreement”), dated as of September 7, 2020, by and among BMRG Merger Sub, LLC, our wholly-owned subsidiary and a Delaware limited liability company (“Merger Sub I”), BMRG Merger Sub II, LLC, our wholly-owned subsidiary and a Delaware limited liability company (“Merger Sub II”), Eos Energy Storage LLC, a Delaware limited liability company (“EES”), New Eos Energy LLC, a wholly-owned subsidiary of EES and a Delaware limited liability company (“Newco”) and AltEnergy Storage VI, LLC, a Delaware limited liability company (“AltEnergy”).

Pursuant to the Merger Agreement, (1) Merger Sub I merged with and into Newco (the “First Merger”), whereupon the separate existence of Merger Sub I ceased, and Newco continued as the surviving company (such company, in its capacity as the surviving company of the First Merger, is sometimes referred to as the “First Surviving Company”) and became our wholly owned subsidiary; and (2) immediately following the First Merger and as part of the same overall transaction as the First Merger, the First Surviving Company merged with and into Merger Sub II, whereupon the separate existence of the First Surviving Company ceased, and Merger Sub II continued as the surviving company and our wholly owned subsidiary.

Upon the closing of the business combination (the “Closing”), the Company changed its name to “Eos Energy Enterprises, Inc.”
The business combination is accounted for as a reverse recapitalization. EES is deemed the accounting predecessor and the combined entity is the successor SEC registrant, meaning that EES' financial statements for previous periods are disclosed in the registrant’s future periodic reports filed with the SEC. Under this method of accounting, BMRG is treated as the acquired company for financial statement reporting purposes.




22

Recent Developments
On April 8, 2021, the Company entered into a unit purchase agreement (the “Purchase Agreement”) with Holtec. In accordance with the terms and conditions of the Purchase Agreement, on April 9, 2021, the closing date of the Transactions (as defined below), the Company acquired from Holtec the entire 51% percent interest in Hi-Power that was not already owned by the Company. Following the consummation of the transactions set forth in the Purchase Agreement (the “Transactions”), Hi-Power became a 100% indirect, wholly-owned subsidiary of the Company and the obligations of the parties under the Hi-Power joint venture terminated, other than certain obligations that by their terms survive termination. The Purchase Agreement provided that the Company will pay an aggregate purchase price of $25 million dollars for the 51% interest in Hi-Power, with $5 million on May 31, 2021, and the following four anniversaries thereof (subject to earlier required payment of the first installment in certain circumstances). In lieu of a cash payment at the closing of the Transactions, such purchase price obligations are evidenced by a secured promissory note with first priority position, issued by the Company to Holtec, secured by the assets of the Company and guaranteed by the Company. The Purchase Agreement also requires that the Company pay to Holtec, on the closing of the Transactions, an amount in cash equal to approximately $10.2 million, which constitutes the return by the Company of certain contributions made by Holtec to Hi-Power. Additionally, upon closing of the Transactions, we entered into a transition services agreement and a sublease with Holtec.
Key Factors Affecting Operating Results
Commercialization
We continue to ramp up to full commercial production of our Eos Gen 2.3 125|500 DC Battery System. Our testing of Gen 2.3 batteries produced in limited quantities during 2020 has indicated performance at expected levels pending movement into commercial production and delivery. While we expect the performance to be the same as we further scale commercial production, the manufacturing line for this battery system continues to be tested. If performance of the battery system does not meet our specifications, we may need to reduce the speed of production to ensure we have quality batteries that meet our performance specifications. Any delay in production could affect the delivery of batteries to our customers.
We are also in the process of getting a third-party product safety certification from Underwriter Laboratories (UL) for the Eos Gen 2.3 125|500 DC Battery System. While we anticipate receiving the UL Certification, the certification is expected in the second quarter of 2021.
Our growth strategy contemplates increasing sales of a commercial battery system through our direct sales team and sales channel partners. We anticipate our customers to include utilities, project developers, independent power producers and commercial and industrial companies. As we intend to effectuateexpand our sales both in volume and geography, we have started discussions with several companies in North America, Europe, the Middle East, Australia, and Asia about partnering on selling our product in these regions. For some of these potential partners, we have begun discussions ranging from being a reseller of our product to being a joint venture partner in the manufacturing of our battery systems. We expect to continue expanding the direct sales force in North America, adding direct sales people outside North America, and entering into strategic alliances to advance our sales growth globally.
Integration of Alliance Partners
We may in the future seek to construct one or more manufacturing facilities, thereby expanding our manufacturing footprint to meet customer demand.
For sales outside of North America, we may partner with other companies to manufacture our products. The construction of any such facility would require significant capital expenditures and result in significantly increased fixed costs.
We commission and provide services for the operation and maintenance of our battery storage systems deployed to date, and for those battery storage systems sold throughout the life of their operations. In addition, we also offer extended product warranties to supplement the life of these assets. As our sales expand in volume and geography, we have engaged third parties to perform this function on our behalf.
Market Trends and Competition
According to Bloomberg New Energy Finance (“BNEF”) the global energy storage market is expected to grow to a cumulative 1,095 gigawatts (“GW”), attracting an Initial Business Combinationestimated $660 billion in future investment by 2040. With approximately 3.3 GW of energy storage commissioned globally in 2019, it is expected to increase to 4.7 GW in 2020. It is expected that the global energy storage market will grow at a 53% compound annual growth rate from 6,480 megawatt hours (“MWh”) in 2019 to approximately 83,000 MWh by 2025.
23

Based on BNEF, the United States would represent over 15% of this global market. The percentage of renewable energy in total electricity generation in the United States will change from 18% in 2019 to 36% by 2030 and solar energy is estimated to contribute 20% to the total electricity supply. Favorable regulatory conditions such as the ongoing implementation of FERC Order 841, along with state sponsored incentives in New York, California, Massachusetts and other states coupled with the rapid growth of solar PV plus storage applications throughout the United States are expected to grow the utility-scale energy storage market from 172 megawatts (“MW”) / 345 MWh in 2019 to 6,631 MW / 17,563 MWh by 2025. It is estimated that 1,250 GW of additional capacity from renewables will be delivered to the grid by 2024, leading to an increased demand for energy storage.
Factors affecting customers to make decision when choosing from different battery storage systems in the market include:
product performance and features;
safety and sustainability;
total lifetime cost of ownership;
total product lifespan;
system energy efficiency;
discharge duration of the storage system;
customer service and support; and
U.S. based manufacturing and sourced materials.
We believe lithium-ion currently has a majority of the market share for the stationary battery industry in the United States. We believe we are the first commercially available battery system that does not have a lithium-ion chemistry. We anticipate our battery system using cashZnyth® technology will gradually take over market share within the battery industry. Our system’s unique characteristics position us for success in the market, including 100% depth of discharge, low degradation rate, 3-12 hour discharge duration capability, inherent system safety and low O&M costs. Our ability to successfully deploy our battery system technology and gain market share in the energy storage market will be important to the growth of our business.
Regulatory Landscape
In North America, geographic distribution of energy storage deployment has been driven by regulatory policy with both federal and state level programs contributing to stable revenue streams for energy storage.
Covid-19
We have implemented operational and protective measures to ensure the safety, health and welfare of our employees and stakeholders. This includes implementing work from home policies for non-essential employees, which constitutes 78% of our workforce. We have also ensured that all employees and visitors that visit our office have access to personal protective equipment and we strictly enforce social distancing. We will maintain these precautions and procedures until we believe Covid-19 is under adequate control. To-date, Covid-19 caused a delay of several weeks in completing the proceedsUL certification of the Gen 2.3 product due to the certification company being delayed in completing the in-person witness tests. In addition, it caused the delay for us to deliver products to one of our customers. Other than these delays, Covid-19 did not have a material impact on our operations or financial condition.
The full impact of the Covid-19 pandemic on our financial condition and results of operations will depend on future developments, such as the ultimate duration and scope of the pandemic, its impact on our employees, customers, and vendors, in addition to how quickly normal economic conditions and operations resume and whether the pandemic impacts other risks disclosed in the “Risk Factors” section of our annual report on Form 10-K for the year ended December 31, 2020. Even after the pandemic has subsided, we may continue to experience adverse impacts to our business from any economic recession or depression that may occur as a result of the pandemic. Therefore, we cannot reasonably estimate the impact at this time. We continue to actively monitor the pandemic and may determine to take further actions that alter our business operations as may be required by federal, state, or local authorities or that we determine to be in the best interests of our employees, customers, vendors, and shareholders.
Components of Results of Operations
As the Merger is accounted for as reverse recapitalization, the operating results included in this discussion reflect the historical operating results of EES prior to the Merger and the combined results of Eos following the closing of the Merger. The assets and liabilities of the Company are stated at their historical cost.
Revenue
24

We have generated revenues from limited sales as we recently launched our next generation energy storage solution Gen 2.3 that is scalable and can be used for a variety of commercial use cases. We expect revenues to increase as we scale our production to meet demand for the next generation of our product.
Cost of goods sold
In August 2019, we established a joint venture, HI-POWER, that manufactures the Gen 2.3 battery system on our behalf. Our cost of sales for the Gen 2.3 battery system includes the purchase of the manufactured system from Hi-Power, the joint venture which produces the Gen 2.3 battery system. On April 8, 2021, EES LLC, our wholly-owned subsidiary entered into a Purchase Agreement to acquire Holtec’s 51% remaining ownership stake in HI-POWER, and HI-POWER became our
wholly-owned subsidiary after closing of the Transactions. Cost of sales also includes the provision for excess, obsolete and slow-moving inventories, the reserve for losses on firm purchase commitments, cost of products sold directly by the Company to our customers, depreciation of manufacturing plant and equipment, warranty accruals, as well as shipping, logistics and facility related costs. We expect our cost of sales to exceed revenues in the near term as we continue to scale our business.
Before launching commercial production of our Gen 2.3 battery system, we manufactured our battery systems ourselves and our cost of sales included material, labor, and other direct costs related to the manufacture of energy storage product for sale to customers. Other items contributing to cost of sales were manufacturing overhead such as engineering expense, equipment maintenance, environmental health and safety, quality and production control and procurement.
Research and development
Research and development expenses consist primarily of salaries and personnel-related costs as well as products, materials, third party services, and depreciation on equipment and facilities used in our research and development process. We expect our research and development costs to increase for the foreseeable future, as we continue to invest in research and development activities that are necessary to achieve our technology and product roadmap goals.
General and administrative expenses
General and administrative expenses consist mainly of personnel-related expenses including corporate, executive, finance, and other administrative functions, expenses for outside professional services, including legal, audit and accounting services, as well as expenses for facilities, depreciation, amortization, travel, and marketing costs. We expect general, and administrative expenses to increase for the foreseeable future as we scale our headcount with the growth of our business, and as a result of operating as a public company, including compliance with the rules and regulations of the SEC, legal, audit, additional insurance expenses, investor relations activities, and other administrative and professional services.
Grant expense (income), net
Grant expense (income), net includes our expenses net of reimbursement related to grants provided by the California Energy Commission (“CEC”).
Income (loss) on equity in unconsolidated joint venture
The income (loss) on equity in unconsolidated joint venture represents our proportionate share of the income (loss) from our investment in HI-POWER LLC, a joint venture established with Holtec Power, Inc. We acquired Holtec’s 51% interest in Hi-Power in April 2021.
Interest expense
Interest expense consists primarily of interest incurred on our convertible notes before the Merger, including the accretion of interest on convertible notes that contained embedded features that permit holders to demand immediate repayment of principal and interest. All convertible notes were converted to common stock in connection with the Merger and no balance was outstanding as of March 31, 2021 and December 31, 2020.
Change in fair value, embedded derivative
The convertible notes issued during 2019 and 2020 contained an embedded derivative feature that could accelerate the repayment of the convertible notes upon a qualified financing event not within our control. This embedded derivative resulted in the recording of a premium or discount on convertible notes that were recognized in earnings upon their issuance. In connection with the Merger, all convertible notes were converted to common stock and the embedded derivative fair value was zero as of March 31, 2021 and December 31, 2020.
25

Change in fair value, warrants liability
The Private Placement Warrants were recognized by the Company as of the Merger Date at fair value of $559 and classified as a liability in the consolidated balance sheet. Thereafter, the change in fair value is recognized as a derivative gain (loss) each reporting period in the consolidated Statement of Operations. The Private Placement Warrants are classified as Level 2 financial instruments.
Results of Operations
Comparison three months ended March 31, 2021 and 2020
The following table sets forth our operating results for the periods indicated:
 Three Months Ended
March 31
$%
($ in thousands)20212020ChangeChange
Revenue$164 $— $164 NM
Cost and expenses:    
Cost of sales100 57 43 75 
Research and development5,053 2,230 2,823 127 
General and administrative expenses16,654 2,359 14,295 606 
Grant expense (income), net346 (338)(98)
Operating loss(21,651)(4,992)(16,659)334 
Other income (expense)    
Interest (expense) income, net(21)(95)74 (78)
Interest expense  related party— (3,715)3,715 (100)
Change in fair value, embedded derivative— (515)515 (100)
Change in fair value, warrant liability(224)— (224)NM
Income (loss) on equity in unconsolidated joint venture440 (31)471 (1,519)
Net loss$(21,456)$(9,348)$(12,108)130 
Revenue
Revenue was $164 and nil for the three months ended March 31, 2021 and 2020, respectively, related to sales of our initial public offering (the “Public Offering”)energy storage solution for specific customer application. In 2020, Eos transitioned our business to launch our next generation of energy storage solutions Gen 2.3 and no revenue was recognized during this period. We shipped our first customer order of Gen 2.3 in January 2021.
Cost of sales
Cost of sales increased by $43, or 75% with $0.1 million for the three months ended March 31, 2020 and $0.1 million for the three months ended March 31, 2021. The results include $0.7 million increase from payroll related costs, $0.6 million increase from overhead, facility cost and warranty expense and $0.3 million increase from inventory reserve. This was partially offset by the reversal of a provision for loss on firm purchase commitments for $1.6 million that closedthe Company had recorded in 2020 and which was related to product intended to be purchased for commercial purposes. During the three months ended March 31, 2021, these products were received, and the Company used them for R&D purposes. The associated expense was therefore recorded within Research and Development.
Research and Development
Research and development costs increased by $2.8 million or 127% from $2.2 million for the three months ended March 31, 2020 to $5.1 million for the three months ended March 31, 2021. The primary driver for the increase was due to additional expenses related to materials and supplies. Specifically, battery testing expenses increased by $2.2 million, as we continued testing of our Gen 2.3 battery systems. We also increased our R&D headcount, which resulted in $0.5 million increase of payroll and personnel costs. These factors were partially offset by reduced expenditures for lease and insurance related costs.
26

General and Administrative Expenses
General and administrative expenses increased by $14.3 million or 606% from $2.4 million for the three months ended March 31, 2020 to $16.7 million for the three months ended March 31, 2021. Included in this is an increase in stock-based compensation for employees of $2.5 million. The increase of General and administrative expenses was further due to $1.0 million increase in payroll and personnel costs, as we continue to expand our workforce and hire new employees in various departments. The Company also incurred a $2.9 million increase in professional services, related to consulting, legal, audit, tax and insurance. As Eos focuses more on May 22,sales of the Gen 2.3 battery storage solution, these outside services are crucial to our professional growth and integrity. In addition, for the three months ended March 31, 2021, the Company incurred $7.8 million expense to accrue for payments required to be made to Holtec under the JV agreement.
Grant expense (income), net
Grant expense (income), net decreased by $0.3 million or 98% from $0.3 million for the three months ended March 31, 2020 (the “Closing Date”)to $8 for the three months ended March 31, 2021. The decrease results from higher grant income earned for three months ended March 31, 2021 and level of research and development activity related to our grants from the California Energy Commission.
Income (loss) on equity in unconsolidated joint venture
The income (loss) from equity in unconsolidated joint venture is attributable to the results of our joint venture Hi-Power. The joint venture commenced its principal operations related to the manufacture of the Gen 2.3 battery system in the fourth quarter of 2020, therefore the joint venture incurred losses in the first quarter of 2020 and turned a profit for the three months ended March 31, 2021.
Interest expense — related party
Interest expense-related party decreased by $3.7 million from $3.7 million for the three months ended March 31, 2020 to nil for the three months ended March 31, 2021. The interest expense related to the convertible notes the Company issued in 2019 and 2020, which were converted to common stock in connection with the Merger. No balance was outstanding during the three months ended March 31, 2021.
Change in fair value, embedded derivative
The change in fair value of $0.5 million reflects the change in fair value of the embedded derivative feature on our convertible notes that was recorded through earnings. The convertible notes were fully converted to common stock in connection with the Merger, thus there was no balance for the three months ended March 31, 2021.
Change in fair value, warrants liability
The $0.2 million increase of change in fair value, warrants liability from December 31, 2020 to March 31, 2021 reflects the change in fair value of the private warrants classified as liability during the three months ended March 31, 2021.
Liquidity and Capital Resources
As of March 31, 2021, we had cash and cash equivalents of $100.7 million. Since our inception, we have financed our operations primarily through funding received from the private placement of convertible notes and the issuance of common and preferred units. In November 2020, we received $142.3 million in connection with the consummation of the Merger and the private placement unitsupon the Closing.
We expect capital expenditures and working capital requirements to purchase sharesincrease as we seek to execute on our growth strategy. We currently anticipate that total capital expenditures for fiscal 2021 will be approximately $35 to $40 million which will be used primarily for additional equipment, automation, and implementation to increase our capacity and efficiency to meet our customer’s needs. Our capital expenditure and working capital requirements in the foreseeable future may change depending on many factors, including but not limited to the overall performance of existing equipment, our sales pipeline, our operating results and any adjustments in our operating plan needed in response to industry conditions, competition or unexpected events. We believe that our existing cash, together with cash from operations, will be sufficient to meet our capital expenditure and working capital requirements for the next twelve months.
The following table summarizes our cash flows from operating, investing, and financing activities for the periods presented.
27

 Three months ended March 31,
($ in thousands)20212020
Net cash used in operating activities$(9,703)$(321)
Net cash used in investing activities(11,360)(1,579)
Net cash provided by (used in) financing activities(73)1,657 
Cash flows from operating activities:
Our cash flows used in operating activities to date have been primarily comprised of costs related to research and development, manufacturing of our Class Ainitial energy storage products, and other general and administrative activities. As we continue and expand commercial production, we expect our expenses related to personnel, manufacturing, research and development and general and administrative activities to increase.
Net cash used in operating activities was $9.7 million for the three months ended March 31, 2021 which is comprised of our net loss of $21.5 million, adjusted for non-cash charges, including provision for firm purchase agreements of $1.6 million, stock-based compensation of $2.5 million, depreciation and amortization of $0.5 million, and change in fair value of warrants liability of $0.2 million. The net cash inflow from changes in operating assets and liabilities was $10.6 million, primarily driven by an increase in accounts payable and accrued expenses of $9.6 million and a decrease in prepaid and other assets of $0.7 million.
Net cash used in operating activities was $0.3 million for the three months ended March 31, 2020 which is comprised of our net loss of $9.3 million, adjusted for non-cash interest expense on our convertible debt of $3.7 million and other non-cash charges, including depreciation and amortization of $0.4 million and change in fair value of embedded derivative of $0.5 million. The net cash inflow from changes in operating assets and liabilities was $4.4 million, primarily driven by an increase in accounts payable and accrued expenses of $2.0 million and a $2.5 million decrease in receivable on sale of state tax attributes.
Cash flows from investing activities:
Our cash flows from investing activities for the three months ended March 31, 2021 have been comprised primarily of purchases of property and equipment of $4.5 million, $4.0 million investment in joint venture and $2.9 million notes receivable advanced to customers.
Net cash used in investing activities or the three months ended March 31, 2020 includes $1.4 million purchases of property and equipment and $0.2 investments in joint venture.
Cash flows from financing activities:
Net cash used in financing activities was $0.1 million for the three months ended March 31, 2021, primarily due to the repayment of vendor related financing of $0.1 million.
Net cash provided by financing activities was $1.7 million for the three months ended March 31, 2020 and included proceeds from the issuance of convertible notes of $1.4 million and $0.3 million from the issuance of contingently redeemable preferred units.
We have certain obligations and commitments to make future payments under contracts. The following table sets forth our estimates of future payments at March 31, 2021. See Note 8 — Commitment and contingencies and Note 13 — Long term debt for a further description of these obligations and commitments.

($ in thousands)TotalLess than 1 year1-3 years3-5 yearsMore than 5 years
Paycheck Protection Program Loan$1,257 1,152 105 — — 
Operating and capital lease$4,638 702 1,615 1,896 425 
Firm purchase commitment$295 295 — — — 
Other loans$24 24 — — 
Total$6,214 2,173 1,720 1,896 425 

28

At March 31, 2021, we had agreements to provide loan commitments to our customers for $11.3 million. $3.0 million were drawn on that commitment as of March 31, 2021. Additionally, the above does not reflect the obligation to pay the cash amount to Holtec described in “Recent Developments.”
To execute our business strategy, we intend to continue to make investments to support our business and will require additional funds. In particular, we will require additional funds to develop new products and enhance existing products, expand our operations, including our sales and marketing organizations and our presence outside of the United States, improve our infrastructure or acquire complementary businesses, technologies, products and other assets. Accordingly, we anticipate that equity or debt financings to secure additional funds will be necessary and we intend to pursue such financing to support our business strategy. We may not be able to obtain additional financing on terms favorable to us, if at all. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, our ability to continue to support our business strategy and to respond to business challenges could be significantly impaired.
Off-Balance Sheet Arrangements
On January 10, 2020, the Company entered into a one-year invoice securitization facility (the “LSQ Invoice Purchase Agreement Facility”) pursuant to (i) an Invoice Purchase Agreement (the “IPA”), as sellers, (the “Seller”), and LSQ Funding Group, L.C. (“LSQ”), as purchaser (the “Purchaser”). Under the terms of the IPA, the Company contributed certain invoices, related collections and security interests (collectively, the “Invoices”) to LSQ on a revolving basis. Under the terms of the IPA, the Company issued to the Purchasers an ownership interest in the Invoices for up to $3.5 million in cash proceeds. This facility was terminated in September 2020. During the three months ended March 31, 2020, the Company received $2.4 million from the IPA.
As of March 31, 2021 and December 31, 2020, we did not have any off balance sheet receivables outstanding nor did we incur any costs associated with off-balance sheet arrangements. We did not have any other material off-balance sheet arrangements as of March 31, 2021 and December 31, 2020.
Critical Accounting Policies and Use of Estimates
Our consolidated financial statements are prepared in conformity with U.S. generally accepted accounting principles. In preparing our consolidated financial statements, we make assumptions, judgments, and estimates on historical experience and various other factors that we believe to be reasonable under the circumstances. Actual results could differ materially from these estimates under different assumptions or conditions. We regularly reevaluate our assumptions, judgments, and estimates.
Our significant accounting policies are described in Note 1, “Nature of Operations and Summary of Significant Accounting Policies,” in the Notes to the audited financial statements included in our annual report on Form 10-K for the year ended December 31, 2020. Our most significant accounting policies, which reflect significant management estimates and judgment in determining amounts reported in our financial statements were as follows. There have been no material changes
to our critical accounting policies and estimates as compared to our critical accounting policies and estimates included in our
annual report on Form 10-K for the year ended December 31, 2020.

Principles of Consolidation and Reverse Acquisition
The Merger was accounted for as a reverse recapitalization in accordance with ASC 805 Business combination. Under this method of accounting, BMRG has been treated as acquiree and EES is treated as acquirer for financial reporting purposes. This determination was primarily based on current shareholders of EES having a relative majority of the voting power of the combined entity, the operations of EES prior to the acquisition comprising the only ongoing operations of the combined entity, and senior management of EES comprising the majority of the senior management of the combined entity. Accordingly, for accounting purposes, the financial statements of the combined entity represent a continuation of the financial statements of EES with the acquisition being treated as the equivalent of EES issuing stock for the net assets of BMRG, accompanied by a recapitalization. The net assets of BMRG were recognized at historical cost as of the date of the Merger, with no goodwill or other intangible assets recorded.
29


Inventory Valuation
Inventory is stated at the lower of cost or net realizable value. The Company capitalizes inventory costs when, based on management’s judgment, future commercialization is considered probable and the future economic benefit is expected to be realized; otherwise, such costs are expensed as research and development. Inventory is evaluated for impairment periodically for excess, obsolescence and for instances where cost of the inventory is in excess of its estimated net realizable value. In estimating a provision for excess, obsolete and slow-moving inventory, we consider such factors as competitor offerings, market conditions and the life cycle of the product. If inventory on-hand is determined to be excess, obsolete or has a carrying amount that exceeds its net realizable value, we will reduce the carrying amount to its estimated net realizable value.
The Company assesses whether losses on purchase commitments should be accrued. Losses that are expected to arise from firm, non-cancellable, commitments for future purchases are recognized unless recoverable. The recognized loss on purchase commitments is reduced as inventory items are received for research and development purposes and the remaining purchase commitment decreases.
Fair Value Measurement
The Company estimated the original fair value of the contingently issuable common stock (“Private Placement Warrants”) that closedis contingently issuable based on a Monte Carlo Stimulation pricing model considering stock price of the Company, the risk free rate of 0.41% and a volatility of 55% utilizing a peer group based on five year term.
The fair values of the Sponsor Earnout Shares on the Closing Datedate were estimated using a Monte Carlo simulation based on the stock price of the Company, a risk free rate of 0.41% and from additional issuancesa volatility of if any, our capital55% utilizing a peer group based on a five year term. The fair value of the first tranche of Sponsor Earnout Shares that vested on December 16, 2020 was based on the closing share price of the Company’s publicly traded stock and our debt, oron that date.
Private Placement Warrants are classified as Level 2 financial instruments of the fair value hierarchy. The transfer of the Private Placement Warrants to anyone outside of a combinationsmall group of cash, stock and debt.

Our business activities from inception to March 31, 2020 consisted primarilyindividuals constituting the Sponsors of our formation and preparation for our Public Offering that was completed on May 22, 2020, and since the offering on May 22, 2020, our activity has been limited to identifying and evaluating prospective acquisition targets for an Initial Business Combination.

At March 31, 2020, we had cash of $14,894 and current liabilities of $85,625. Further, we expect to continue to incur significant costsCompany would result in the pursuitPrivate Placement Warrants becoming Public warrants. Thus, the fair value of each Private Placement Warrants is the same as that of a Public warrants, which are publicly traded, with an insignificant adjustment for short-term marketability restrictions.

Stock-based compensation is estimated at the grant date based on the fair value of the awards and is recognized as expense over the service period. We estimate the fair value of stock options and stock purchase warrants using the Black-Scholes option pricing model.
Convertible Notes Payable
We record conventional convertible debt in accordance with ASC 470-20, Debt with Conversion and Other Options. Conventional convertible debt is a financial instrument in which the holder may only realize the value of the conversion option by exercising the option and receiving the entire proceeds in a fixed number of shares or the equivalent amount of cash. Convertible instruments that are not bifurcated as a derivative, and not accounted for as a separate equity component under the cash conversion guidance are evaluated to determine whether their conversion prices create an embedded beneficial conversion feature at inception, or may become beneficial in the future due to potential adjustments. A beneficial conversion feature is deemed to be a nondetachable conversion feature that is “in-the-money” at the commitment date. The in-the-money portion, also known as the intrinsic value of the option, is recorded in equity, with an offsetting discount to the carrying amount of convertible debt to which it is attached. The intrinsic value of the beneficial conversion feature within its convertible debt, including amortization of the debt discount recorded in connection with a beneficial conversion feature, was not material to our acquisition plans. We cannot assure youfinancial statements.
The convertible notes issued before 2021 contained an embedded derivative feature that our plans to complete an Initial Business Combination will be successful.

Resultscould accelerate the repayment of Operations

the convertible notes upon either a qualified financing event or the note holders’ put exercise. For the three months ended March 31, 2020, we had a net lossembedded derivative liabilities with an initial fair value of $454. Our net loss for$126 were recognized. During the three months ended March 31, 2020 solely consisteda change in fair value of formation costs and general and administrative expenses. Thereembedded derivative loss of $515 was no operationrecognized. The fair value of the Company during the three months endedembedded derivative was zero as of March 31, 20192021 and December 31, 2020 as the Company was formed on June 3, 2019.

Liquidity and Capital Resources

Until the closinga result of the Public Offering, our only source of liquidity was an initial sale of shares (the “Founder Shares”) of Class B common stock, par value $0.0001 per share, to our sponsor, B. Riley Principal Sponsor Co. II, LLC, a Delaware limited liability company (the “Sponsor”), and the proceeds of a promissory note (the “Note”) from the Sponsor, in the amount of $300,000. The Note was repaid upon the closingconversion of the Public Offering.

At March 31, 2020 we had cash of $14,894 and working capital deficit of $70,731.

We completed the sale of 17,500,000 units at an offering price of $10.00 per unit in the Public Offering. The Sponsor subscribed to purchase an aggregate of 650,000 units at a price of $10.00 per Private Placement Unit in a private placement that closed on May 22, 2020 simultaneously with the Public Offering. The sale of the 17,500,000 Units generated gross proceeds of $175,000,000, less underwriting commissions of $3,500,000 (2% of gross proceeds) and other offering costs of $523,135. The Private Placement Units generated $6,500,000 of proceeds.


Each unit consists of one share of our Class A common stock, $0.0001 par value (each a “public share”), and one-half of one redeemable warrant, with each whole warrant exercisable for one share of Class A common stock (each, a “Warrant” and, collectively, the “Warrants” and, with respect to the warrants underlying the Private Placement Units, the “Private Placement Warrants”). One Warrant entitles the holder thereof to purchase one whole share of Class A common stock at a price of $11.50 per share.

We granted the underwriters a 45-day option to purchase on a pro rata basis up to 2,625,000 additional units at the initial public offering price less the underwriting discounts and commissions.On May 28, 2020, the underwriters confirmed that they will not be exercising their over-allotment option in whole or in part.

In addition, income on the funds held in the Trust Account may be released to us to pay our franchise and income taxes.

We do not believe we will need to raise additional funds other than the funds raised in the Public Offering on May 22, 2020 in order to meet the expenditures required for operating our business. However, if our estimates of the costs of identifying a target business, undertaking in-depth due diligence and negotiating an Initial Business Combination are less than the actual amount necessary to do so, we may have insufficient funds available to operate our business prior to our Initial Business Combination. Moreover, we may need to obtain additional financing either to complete our Initial Business Combination or because we become obligated to redeem a significant number of our shares of Class A common stock upon completion of our Initial Business Combination, in which case we may issue additional securities or incur debt in connection with such business combination (including from our affiliates or affiliates of our Sponsor).

Off-Balance Sheet Arrangements

We have no obligations, assets or liabilities which would be considered off-balance sheet arrangements. We do not participate in transactions that create relationships with unconsolidated entities or financial partnerships, often referred to as variable interest entities, which would have been established for the purpose of facilitating off-balance sheet arrangements.

We have not entered into any off-balance sheet financing arrangements, established any special purpose entities, guaranteed any debt or commitments of other entities, or entered into any non-financial agreements involving assets.

Contractual Obligations

At March 31, 2020, we did not have any long-term debt, capital lease obligations, operating lease obligations or long-term liabilities. On May 19, 2020, we entered into an administrative support agreement pursuant to which we have agreed to pay an affiliate of the Sponsor a total of $10,000 per month for office space, administrative and support services. Upon the earlier of the completion of the Initial Business Combination and the Company’s liquidation, we will cease paying these monthly fees.

We have engaged B. Riley FBR, Inc. as advisorsnotes in connection with the Initial Business Combination to assist us in arranging meetings with stockholders to discuss a potential business combination and the target business’ attributes, introduce us to potential investors that may be interested in purchasing our securities, assist us in obtaining stockholder approval for our Initial Business Combination and assist us with the preparation of press releases and public filings in connection with the Initial Business Combination. We will pay B. Riley FBR, Inc. for such services upon the consummation of the Initial Business Combination a cash fee in an amount equal to 3.5% of the gross proceeds of the Public Offering (exclusive of any applicable finders’ fees which might become payable). Pursuant to the terms of the business combination marketing agreement, no fee will be due if we do not complete an Initial Business Combination.

Critical Accounting Policies

The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the condensed financial statements, and income and expenses during the periods reported. Actual results could materially differ from those estimates. We have identified the following as our critical accounting policies:

Deferred Offering Costs

We comply with the requirements of the FASB ASC 340-10-S99-1 and SEC Staff Accounting Bulletin Topic 5A — “Expenses of Offering.” Deferred offering costs of $70,000 as of March 31, 2020 consist principally of costs incurred in connection with preparation for the Public Offering. These costs, together with the underwriter discount, were charged to capital upon completion of the Public Offering in May 2020.

Merger.

Recent Accounting Pronouncements

Management does not believe that any recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on our financial statements.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

AsRisk

Not Applicable
30

Item 4. Controls and Procedures.

Procedures

Evaluation of Disclosure controlsControls and procedures are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in company reports filed or submitted under the Exchange Act is accumulated and communicated to management, including our Chief Executive Officer (who serves as our Principal Executive Officer) and Chief Financial Officer (who serves as our Principal Financial and Accounting Officer), as appropriate, to allow timely decisions regarding required disclosure.

As required by Rules 13a-15 and 15d-15 under the Exchange Act, our Chief Executive Officer and Chief Financial Officer carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2020. Based upon his evaluation, our Chief Executive Officer and Chief Financial Officer concluded that ourProcedures

We maintain disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) were effective.

Duringthat are designed to provide reasonable assurance that information required to be disclosed in the most recently completed fiscal quarter, there has been no changereports that we file or submit under the Securities Exchange Act of 1934, as amended, or the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in our internal control over financial reportingthe Securities and Exchange Commission’s rules and forms, and that has materially affected, orsuch information is reasonably likelyaccumulated and communicated to materially affect, our internal control over financial reporting.

Inherent Limitation on Effectiveness of Controls

Our management, including our Chief Executive Officer and Chief Financial Officer, doesas appropriate to allow timely decisions regarding required disclosures. Because of inherent limitations, disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable, and not expectabsolute, assurance that the objectives of disclosure controls and procedures are met.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures oras of the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures were not effective due to material weaknesses in our internal control over financial reporting resulting from our lack of (i) a formalized internal control framework, (ii) segregation of duties in the financial reporting process, (iii) review and approval of journal entries, and (iv) management review controls. These deficiencies are a result of our previously smaller footprint as a private company and we are building our team to meet the requirements as a public company. These material weaknesses resulted in the revision of our consolidated financial statements as of and for the year ended December 31, 2020. Specifically, while the classification of Private Placement Warrants with provisions like those of ours as equity was broadly accepted industry practice, our management, due to our lack of a formalized internal control framework, did not identify the error in this accounting practice until the SEC’s issuance of their statement calling out this treatment and management's consideration thereof.
Although these material weaknesses have not been remediated, we have taken and will continue to take steps to strengthen our accounting function and plan to hire additional professionals to accommodate the expansion of our business. In addition, we are in the process of implementing, and plan to continue to implement, new controls, processes and technologies to improve our internal controls over financial reporting.

Management does not expect that our internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no matter how well-designedwell conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system’s objectives will besystems are met. TheFurther, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Further, becauseBecause of the inherent limitations in alla cost-effective control systems,system, no evaluation of controlsinternal control over financial reporting can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, have been or will be detected. The design of any system of controls is based
Changes in part on certain assumptions about the likelihood of future events, and there can beInternal Control Over Financial Reporting
There were no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Projections of any evaluation of the effectiveness of controls to future periods are subject to risks. Over time, controls may become inadequate because of changes in conditionsour internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934) during our most recent quarter that have materially affected, or deterioration in the degreeare reasonably likely to materially affect, our internal control over financial reporting.

31

Part II - Other information

PART II—OTHER INFORMATION

Item 1. Legal Proceedings.

None.

Proceedings
From time to time, we may be involved in litigation relating to claims arising out of our operations. There is no material litigation, arbitration or governmental proceeding currently pending against us or any members of our management team in their capacity as such.

Item 1A. Risk Factors.

Factors that could cause our actual results

In addition to differ materially from thosethe other information set forth in this Quarterly Report are any of the risks described in our prospectus dated May 19, 2020 filed with the SEC on May 20, 2020. Any of these factors could result in a significant or material adverse effect on our results of operations or financial condition. Additional risk factors not presently known to us or that we currently deem immaterial may also impair our business or results of operations.

As of the date of this Quarterly Report on Form 10-Q, thereyou should carefully consider the factors discussed in Part I, Item 1A, “Risk Factors” in our Annual Report on Form 10-K, for the fiscal year ended December 31, 2020. There have been no material changes to thein our risk factors from those disclosed in our prospectus dated May 19, 2020 filed with the SECAnnual Report on May 20, 2020. However, we may disclose changes to such factors or disclose additional factors from time to time in our future filings with the SEC.

On January 30, 2020, the World Health Organization (“WHO”) announced a global health emergency because of a new strain of coronavirus (the “COVID-19 outbreak”). In March 2020, the WHO classified the COVID-19 outbreak as a pandemic, based on the rapid increase in exposure globally. The full impact of the COVID-19 outbreak continues to evolve. The impact of the COVID-19 outbreak on the Company's results of operations, financial position and cash flows will depend on future developments, including the duration and spread of the outbreak and related advisories and restrictions. These developments and the impact of the COVID-19 outbreak on the financial markets and the overall economy are highly uncertain and cannot be predicted. If the financial markets and/or the overall economy are impacted for an extended period, the Company's results of operations, financial position and cash flows may be materially adversely affected. Additionally, the Company's ability to complete an Initial Business Combination may be materially adversely affected due to significant governmental measures being implemented to contain the COVID-19 outbreak or treat its impact, including travel restrictions, the shutdown of businesses and quarantines, among others, which may limit the Company's ability to have meetings with potential investors or affect the ability of a potential target company's personnel, vendors and service providers to negotiate and consummate an Initial Business Combination in a timely manner. The Company's ability to consummate an Initial Business Combination may also be dependent on the ability to raise additional equity and debt financing, which may be impacted by the COVID-19 outbreak and the resulting market downturn. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Form 10-K.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

Unregistered Sales of Equity Securities

On May 22, 2020, simultaneously with the closing of the Public Offering, we completed the private sale of 650,000 Private Placement Units at a purchase price of $10.00 per Private Placement Unit, to the Sponsor, generating gross proceeds to us of $6,500,000. The Private Placement Units are substantially identical to the units sold as part of the units in the Public Offering (as described below), except that our Sponsor has agreed not to transfer, assign or sell any of the Private Placement Units (except to certain permitted transferees) until 30 days after the completion of our Initial Business Combination. The Private Placement Units are also not redeemable by us so long as they are held by our Sponsor or its permitted transferees, and they may be exercised by our Sponsor and its permitted transferees on a cashless basis. The Private Placement Units were issued in connection with our incorporation pursuant to the exemption from registration contained in Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”).

Use of Proceeds

On May 22, 2020, we consummated the Public Offering of 17,500,000 Units. Each Unit consists of one share of Class A common stock of the Company, par value $0.0001 per share, and one-half of one redeemable warrant of the Company. Each whole warrant entitles the holder thereof to purchase one share of Class A Common Stock for $11.50 per share, and only whole warrants are exercisable. The warrants will become exercisable on the later of 30 days after the completion of our Initial Business Combination and 12 months from the closing of the Public Offering and will expire five years after the completion of our Initial Business Combination or earlier upon redemption or liquidation. Subject to certain terms and conditions, we may redeem the warrants either for cash once the warrants become exercisable or for shares of our Class A Common Stock commencing 90 days after the warrants become exercisable.

The units were sold at a price of $10.00 per unit, generating gross proceeds to the Company of $175,000,000. B. Riley FBR, Inc. served as the sole book-running manager for the offering. The securities sold in the Public Offering were registered under the Securities Act on a registration statement on Form S-1 (No. 333-237812). The SEC declared the registration statements effective on May 20, 2020.


None

We paid a total of $3,500,000 in underwriting discounts and commissions and $523,135 for other costs and expenses related to the Public Offering. B. Riley FBR, Inc., an underwriter in the Public Offering, and an affiliate of us and our Sponsor (which Sponsor beneficially owns more than 10% of our common stock) received a portion of the underwriting discounts and commissions related to the Public Offering. After deducting the underwriting discounts and commissions and incurred offering costs, the total net proceeds from our Public Offering and the sale of the Private Placement Warrants was approximately $177,439,000, of which $176,750,000 (or $10.10 per unit sold in the Public Offering) was placed in the Trust Account. We also repaid $100,000 in noninterest bearing loans made to us by our Sponsor to cover expenses related to the Public Offering. Other than as described above, no payments were made by us to directors, officers or persons owning ten percent or more of our common stock or to their associates, or to our affiliates.

Item 3. Defaults Upon Senior Securities.

None.

Securities
None

Item 4. Mine Safety Disclosures.

Not applicable.

Disclosures
None

Item 5. Other Information.

None.

Information

None
32

(a) Exhibits
Incorporated by Reference
Exhibit NumberDescription of DocumentSchedule/FormFile NumberExhibitsFiling Date
10.1Form 8-KFile No. 001-3929110.1March 12, 2021
10.2Form 8-KFile No. 001-3929110.1March 31, 2021
31.1*
31.2*
32*
101.INSXBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCHXBRL Taxonomy Extension Schema Document
101.CALXBRL Taxonomy Extension Calculation Linkbase Document
101.DEFXBRL Taxonomy Extension Definition Linkbase Document
101.LABXBRL Taxonomy Extension Label Linkbase Document
101.PREXBRL Taxonomy Extension Presentation Linkbase Document
____________________________
Certain of the exhibits and schedules to this Exhibit have been omitted in accordance with Regulation S-K Item 6. Exhibits.

601(a)(5). The followingRegistrant agrees to furnish a copy of all omitted exhibits areand schedules to the SEC upon its request.

*Filed herewith.
(b)Financial Statements. The financial statements filed as part of orthis registration statement are listed in the index to the financial statements immediately preceding such financial statements, which index to the financial statements is incorporated herein by reference into, this Quarterly Report on Form 10-Q.

reference.

33

Table of ContentsExhibit Index

Exhibit

No.

Description
31.1*Certification of Chief Executive Officer pursuant to Rules 13a-14 and 15d-14 promulgated under the Securities Exchange Act of 1934
31.2*Certification of Chief Financial Officer pursuant to Rules 13a-14 and 15d-14 promulgated under the Securities Exchange Act of 1934
32.1**Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2**Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*XBRL Instance Document
101.SCH*XBRL Taxonomy Extension Schema Document
101.CAL*XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*XBRL Taxonomy Extension Label Linkbase Document
101.PRE*

XBRL Taxonomy Extension Presentation Linkbase Document

*Filed herewith
**Furnished herewith


SIGNATURES

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

B. Riley Principal Merger Corp. II
EOS ENERGY ENTERPRISES, INC.
Date: June 26, 2020By:/s/ DANIEL SHRIBMAN
Date: May 13, 2021By:Name: Daniel Shribman/s/ Joe Mastrangelo
Name:

Joe Mastrangelo

Title:Chief Executive Officer and

Director
(Principal Executive Officer)

Date: May 13, 2021By:/s/ Sagar Kurada
Name:Sagar Kurada
Title:Chief Financial Officer


(Principal Executive OfficerFinancial and
PrincipalFinancial Accounting Officer)

17


34