EXHIBIT 32.2
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO SECTION 906
OF THE SARBANES OXLEY ACT OF 2002
In connection with the annual report of Duff & Phelps Corporation (the “Company”) on Form 10-K/A for the period ended December 31, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Patrick M. Puzzuoli, Executive Vice President & Chief Financial Officer of the Company, certify, to the best of my knowledge, pursuant to Rule 13a-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
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| 1. | The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
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| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the periods presented therein. |
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| | Date: | April 23, 2013 | | /s/ Patrick M. Puzzuoli |
| | | | | PATRICK M. PUZZUOLI |
| | | | | Executive Vice President & Chief Financial Officer |
