UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

B. Riley Principal Merger Corp.

(Name of Issuer)

Class A Common Stock

(Title of Class of Securities)

05586Y 106

 (CUSIP Number)

Phil Ahn

B. Riley Principal Sponsor Co., LLC

299 Park Avenue

21st Floor

New York, New York 10171

(212) 457-3300

Copy to:

Joel L. Rubinstein

Winston & Strawn LLP

200 Park Avenue

New York, New York 10166

(212) 294-6700 

 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

April 9, 2019

 (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.

END OF COVER PAGES

This statement on Schedule 13D (this “Schedule 13D”) relates to the Class A common stock, par value $0.0001 per share (the “Class A Common Stock”), of B. Riley Principal Merger Corp., a Delaware corporation (the “Issuer”). The principal executive offices of the Issuer are located at 299 Park Avenue, 21st Floor, New York, New York 10171.

(a) This statement is filed by (i) B. Riley Principal Sponsor Co., LLC (the “Sponsor”) and (ii) B. Riley Financial, Inc. (“B. Riley Financial” and, together with the Sponsor, the “Reporting Persons”).

(b) The business address of the Reporting Persons is 299 Park Avenue, 21st Floor, New York, New York 10171.

(c) The Sponsor is a Delaware limited liability company owned and controlled by B. Riley Financial, formed solely for the purpose of investing in securities of the Issuer. B. Riley Financial provides collaborative financial services and solutions through several operating subsidiaries.

(d) During the last five years, none of the Reporting Persons has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) During the last five years, none of the Reporting Persons has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f) The Sponsor is a Delaware limited liability company. B. Riley Financial, Inc. is a Delaware corporation.

The information set forth in Item 4 hereof is hereby incorporated by reference into this Item 3, as applicable. The source of funds for acquiring the securities described herein was the working capital of the Sponsor.

The Issuer was incorporated as a Delaware corporation on October 30, 2018. On November 14, 2018, GA International Services Corp. (“GA International”), a California corporation, owned by Great American Group, LLC (“Great American”), a wholly owned subsidiary of B. Riley Financial, merged into the Issuer. GA International operated as GA International Services, LLC, a former California limited liability company, from the date of its incorporation on October 9, 2012 through November 5, 2018, the date it was converted from a limited liability company to a California corporation. All of the membership interests in GA International Services, LLC were issued to Great American in 2012. On November 19, 2018, the Issuer conducted a 1:3,593,750 stock split and reclassification of its common stock, resulting in Great American owning 3,593,750 shares of Class B common stock, par value $0.0001 per share (the “Founder Shares”). On March 12, 2019, 20,000 Founder Shares were transferred to each of Patrick J. Bartels, Jr., James L. Kempner, Timothy M. Presutti and Robert Suss, the Issuer’s independent director nominees, at their par value. On April 4, 2019, the remaining 3,513,750 Founder Shares were contributed by Great American to the Sponsor.

The Founder Shares will automatically convert into shares of Class A Common Stock on the first business day following the consummation of the Issuer’s initial business combination on a one-for-one basis, subject to adjustment for stock splits, stock dividends, reorganizations, recapitalizations and the like, and subject to further adjustment. In the case that additional shares of Class A Common Stock, or equity-linked securities, are issued or deemed issued in connection with the Issuer’s initial business combination, the ratio at which the Founder Shares will convert into shares of Class A Common Stock will be adjusted (unless the holders of a majority of the outstanding Founder Shares agree to waive such adjustment with respect to any such issuance or deemed issuance) so that the number of shares of Class A Common Stock issuable upon conversion of all Founder Shares will equal, in the aggregate, on an as-converted basis, 20% of the total number of shares of Class A Common Stock outstanding after such conversion (after giving effect to any redemptions of Class A Common Stock by public stockholders), including all shares of Class A Common Stock issued or deemed issued or issuable upon conversion or exercise of any equity-linked securities or rights issued or deemed issued by the Issuer in connection with or in relation to the consummation of its initial business combination (including the Placement Shares (as defined below), but not the Placement Warrants (as defined below)), excluding any shares of Class A Common Stock or equity-linked securities exercisable for or convertible into Class A Common Stock issued, or to be issued, to any seller in the initial business combination and any private placement units issued to the Sponsor upon conversion of working capital loans, provided that such conversion of Founder Shares will never occur on a less than one-for-one basis.

Private Placement Units Purchase Agreement

On April 8, 2019, the Sponsor purchased from the Issuer an aggregate of 425,000 units (the “Private Placement Units”) pursuant to the terms of a private placement units purchase agreement, dated as of April 8, 2019 (the “Private Placement Units Purchase Agreement”). On April 12, 2019, the Sponsor purchased from the Issuer an additional 37,500 Private Placement Units in connection with the underwriters’ exercise of their over-allotment option in full. Each Private Placement Unit is comprised of one share of Class A Common Stock (the “Placement Shares”) and one-half of one warrant (the “Placement Warrants”), each whole Placement Warrant entitling the holder thereof to purchase one share of Class A Common Stock at $11.50 per share. Other than the lock-up provisions contained in the Letter Agreement, the Private Placement Units have terms and provisions that are identical to those of the units sold in the Issuer’s initial public offering.

The foregoing description of the Private Placement Units Purchase Agreement is qualified in its entirety by reference to the Private Placement Units Purchase Agreement which is attached hereto as Exhibit 1.

Letter Agreement

On April 8, 2019, the Sponsor agreed, pursuant to a letter agreement with the Issuer (the “Letter Agreement”), to (i) waive its redemption rights with respect to its Founder Shares, Placement Shares and shares of Class A Common Stock in connection with the completion of the Issuer’s initial business combination, (ii) waive its redemption rights with respect to its Founder Shares, Private Placement Shares and shares of Class A Common Stock in connection with a stockholder vote to approve an amendment to the Issuer’s amended and restated certificate of incorporation to modify the substance or timing of the Issuer’s obligation to redeem 100% of the Class A Common Stock if the Issuer has not consummated an initial business combination within 18 months from the closing of its initial public offering and (iii) waive its rights to liquidating distributions from the trust account with respect to their Founder Shares and Private Placement Shares if the Issuer fails to complete its initial business combination within 18 months from the closing of its initial public offering (although it will be entitled to liquidating distributions from the trust account with respect to any other shares of Class A Common Stock they hold if the Issuer fails to complete its initial business combination within the prescribed time frame). If the Issuer submits its initial business combination to its stockholders for a vote, the Sponsor has agreed to vote its Founder Shares and Private Placement Shares in favor of the initial business combination, and the Sponsor has also agreed to vote any other shares of Class A Common Stock in favor of the initial business combination.

The Founder Shares, Private Placement Units, Placement Shares, Placement Warrants and any shares of Class A Common Stock issued upon conversion or exercise thereof are each subject to transfer restrictions pursuant to lock-up provisions in the Letter Agreement. Those lock-up provisions provide that such securities are not transferable or salable (i) in the case of the Founder Shares, until the earlier of (A) one year after the completion of the Issuer’s initial business combination or (B) subsequent to the initial business combination, (x) if the last sale price of the 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 (y) the date on which the Issuer complete a liquidation, merger, capital stock exchange, reorganization or other similar transaction that results in all of the Issuer’s stockholders having the right to exchange their shares of common stock for cash, securities or other property, and (ii) in the case of the Private Placement Units, the Placement Shares, the Placement Warrants and any shares of Class A Common Stock issued upon conversion or exercise thereof until 30 days after the completion of the initial business combination, except in each case (a) to the Issuer’s officers or directors, any affiliates or family members of any of the Issuer’s officers or directors, any members of the Sponsor, or any affiliates of the Sponsor, (b) in the case of an individual, by gift to a member of one of the members of the individual’s immediate family or to a trust, the beneficiary of which is a member of one of the individual’s immediate family, an affiliate of such person or to a charitable organization; (c) in the case of an individual, by virtue of laws of descent and distribution upon death of the individual; (d) in the case of an individual, pursuant to a qualified domestic relations order; (e) by private sales or transfers made in connection with any forward purchase agreement or similar arrangement or in connection with the consummation of an initial business combination at prices no greater than the price at which the securities were originally purchased; (f) in the event of the Issuer’s liquidation prior to the completion of our initial business combination; (g) by virtue of the laws of Delaware or the Sponsor’s limited liability company agreement upon dissolution of the Sponsor; or (h) in the event of our liquidation, merger, capital stock exchange, reorganization or other similar transaction which results in all of the Issuer’s stockholders having the right to exchange their shares of common stock for cash, securities or other property subsequent to our completion of the initial business combination; provided, however, that in the case of clauses (a) through (e) or (g) these permitted transferees must enter into a written agreement agreeing to be bound by these transfer restrictions and the other restrictions contained in the Letter Agreement and by the same agreements entered into by the Sponsor with respect to such securities (including provisions relating to voting, the trust account and liquidation distributions described elsewhere in this prospectus). In addition, the Private Placement Units and the shares and warrants underlying those units may not be sold transferred, assigned, pledged, or hypothecated, or be the subject of any hedging, short sale, derivative, put or call transaction that would result in the economic disposition of the securities by any person for a period of 180 days immediately following the effective date of the Registration Statement or commencement of sales of the public offering, except to any underwriter and selected dealer participating in the offering and their bona fide officers or partners, provided that all securities so transferred remain subject to the lockup restriction above for the remainder of the time period.

In addition, the Letter Agreement provides that in order to finance transaction costs in connection with an intended initial business combination, the Sponsor or its affiliate may, but is not obligated to, loan to the Issuer funds as may be required on a non-interest basis. If the Issuer completes an initial business combination, the Issuer would repay such loaned amounts. In the event that the initial business combination does not close, the Issuer may use a portion of the working capital held outside its trust account to repay such loaned amounts but no proceeds from its trust account would be used for such repayment. Up to $1,500,000 of such loans may be convertible into units of the post business combination entity at a price of $10.00 per unit at the option of the lender. The units would be identical to the Private Placement Units. Except as set forth above, the terms of such loans, if any, have not been determined and no written agreements exist with respect to such loans.

The foregoing description of the Letter Agreement is qualified in its entirety by reference to the Letter Agreement which is attached hereto as Exhibit 2.

Registration Rights Agreement

On April 8, 2019, the Issuer and the Sponsor entered into a registration rights agreement (the “Registration Rights Agreement”). Under the Registration Rights Agreement, the Issuer granted the Sponsor registration rights with respect to the Founder Shares, Private Placement Units, Placement Shares, Placement Warrants, shares of Class A Common Stock underlying the Placement Warrants, and securities that may be issued upon conversion of working capital loans. The Sponsor and other holders of such securities are entitled to make up to three demands, excluding short form registration demands, that the Issuer register such securities for sale under the Securities Act of 1933, as amended (the “Securities Act”). In addition, these holders have “piggy-back” registration rights to include such securities in other registration statements filed by the Issuer. 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 and may not exercise its demand rights on more than one occasion.

The foregoing description of the Registration Rights Agreement is qualified in its entirety by reference to the Registration Rights Agreement which is attached hereto as Exhibit 3.

Forward Purchase Agreement

On April 8, 2019, the Issuer entered into a forward purchase agreement pursuant to which B. Riley Principal Investments, LLC, a Delaware limited liability company, an affiliate of the Sponsor and a subsidiary of B. Riley Financial (the “Forward Purchaser”), agreed that it (or its designees) will purchase an aggregate of 2,500,000 units (the “Forward Purchase Units”), comprised of 2,500,000 shares of Class A Common Stock and 1,250,000 warrants, for an aggregate purchase price of $25,000,000, in a private placement to occur concurrently with the closing of the Issuer’s initial business combination. The proceeds from the sale of the Forward Purchase Units may be used as part of the consideration to the sellers in the Issuer’s initial business combination, 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 regardless of whether any Class A Common Stock is redeemed by the Issuer’s public stockholders and is intended to provide the Issuer with a minimum funding level for its initial business combination. The Forward Purchaser will not have the ability to approve the initial business combination prior to the signing of a material definitive agreement. The Forward Purchase Units will be issued only in connection with the closing of the initial business combination. The Issuer has agreed to grant the Forward Purchaser registration rights with respect to the Forward Purchase Units (and underlying securities) pursuant to a registration rights agreement in the form attached as Exhibit 3 hereto to be entered into at the time of the Issuer’s initial business combination.

The foregoing description of the Forward Purchase Agreement is qualified in its entirety by reference to the Forward Purchase Agreement which is attached hereto as Exhibit 4.

Plans or Proposals

The Reporting Persons do not have any present plan or proposal which would relate to or result in any of the matters set forth in subparagraphs (a) – (j) of Item 4 of Schedule 13D except as set forth herein or such as would occur upon or in connection with completion of, or following, any of the actions discussed herein. The Reporting Persons intend to review their investment in the Issuer on a continuing basis. Depending on various factors including, without limitation, the Issuer’s financial position and investment strategy, the price levels of the Class A Common Stock, conditions in the securities markets and general economic and industry conditions, the Reporting Persons may in the future take such actions with respect to their investment in the Issuer as they deem appropriate including, without limitation, engaging in communications with management and the Board of Directors of the Issuer, engaging in discussions with stockholders of the Issuer or other third parties about the Issuer and the Reporting Persons’ investment, including potential business combinations or dispositions involving the Issuer or certain of its businesses, making recommendations or proposals to the Issuer concerning changes to the capitalization, ownership structure, board structure (including board composition), potential business combinations or dispositions involving the Issuer or certain of its businesses, or suggestions for improving the Issuer’s financial and/or operational performance, purchasing additional shares and/or warrants, selling some or all of its ordinary shares and/or warrants, engaging in short selling of or any hedging or similar transaction with respect to the ordinary shares, including swaps and other derivative instruments, or changing its intention with respect to any and all matters referred to in Item 4.

(a) and (b) The information contained on the cover pages to this Schedule 13D is incorporated herein by reference.

(c) Except for the transactions described in Item 4 of this Schedule 13D, the Reporting Persons have not engaged in any transaction during the past 60 days involving ordinary shares of the Issuer.

(d) None.

(e) Not applicable.

The information set forth in Items 4 and 5 hereof is hereby incorporated by reference into this Item 6, as applicable.

* Filed herewith.

SIGNATURES

After reasonable inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: April 15, 2019

Exhibit 11

JOINT FILING AGREEMENT

Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the “Exchange Act”) the undersigned hereby agree to the joint filing on behalf of each of them of any filing required by such party under Section 13 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with respect to securities of B. Riley Principal Merger Corp., a Delaware corporation, and further agree to the filing, furnishing, and/or incorporation by reference of this Agreement as an exhibit thereto. Each of them is responsible for the timely filing of such filings and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate. This Agreement shall remain in full force and effect until revoked by any party hereto in a signed writing provided to each other party hereto, and then only with respect to such revoking party. This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

Dated: April 15, 2019