EX-23 2 d367954dex23.htm CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Consent of Independent Registered Public Accounting Firm

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statement (No. 333-129390) on Form S-8 of our report dated June 19, 2012 appearing in the annual report on Form 11-K of Oppenheimer & Co. Inc. 401(k) Plan for the year ended December 31, 2011.

/s/ Plante Moran, PLLC

Auburn Hills, Michigan

June 19, 2012