Exhibit 23.4

Consent of Independent Registered Public Accounting Firm

FBR & Co.

Arlington, Virginia

We hereby consent to the incorporation by reference in the Joint Proxy Statement/Prospectus constituting a part of this Registration Statement of our reports dated March 13, 2017, relating to the consolidated financial statements of FBR & Co. and the effectiveness of FBR & Co.’s internal control over financial reporting appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016.

We also consent to the reference to us under the caption “Experts” in the Joint Proxy Statement/Prospectus.

/s/ BDO USA, LLP

McLean, Virginia

March 16, 2017

BDO USA, LLP, a Delaware limited liability partnership, is the U.S. member of BDO International Limited, a UK company limited by guarantee, and forms part of the international BDO network of independent member firms.

BDO is the brand name for the BDO network and for each of the BDO Member Firms.