B. Riley Financial (RILY) 8-K/A Financial Statements and Exhibits

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

B. Riley Financial, Inc.

Woodland Hills, California

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-216763) and Forms S-8 (Nos. 333-202876 and 333-218457) of B. Riley Financial, Inc. of our report dated March 13, 2017, relating to the consolidated financial statements of FBR & Co., which is incorporated by reference in this Form 8-K/A (“Amendment No. 1”).

/s/ BDO USA, LLP

McLean, Virginia

June 27, 2017