Duff & Phelps Corp

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Certification of termination of registration of a class of securities (Section 12(b))

Notice of Effectiveness

Annual report pursuant to Section 13 or 15(d) (amendment)

2.01,2.03,3.01,3.03,5.01,5.02,5.03,8.01,9.01

Notification of removal from listing and/or registration on a national securities exchange

Post-effective amendment to a registration statement

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

5.07

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G) (amendment)

Additional Information for Proxy Statement/ Votes

No description available

Letter from the SEC

No description available

Definitive Proxy Statement

Correspondence with the SEC

Letter from the SEC

Annual report pursuant to Section 13 or 15(d)

2.02,9.01

8.01,9.01

Additional Information for Proxy Statement/ Votes

No description available

1.01,5.02,8.01,9.01

No description available

Additional Information for Proxy Statement/ Votes

5.02

No description available

5.02,9.01

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

3.02,9.01

No description available

Entry into a Material Definitive Agreement

1.01,9.01

Prospectus Supplement for Primary Offering

Free Writing Prospectus

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Notice of Effectiveness

Correspondence with the SEC

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Correspondence with the SEC

Registration statement under Securities Act of 1933 (amendment)

No description available

Letter from the SEC

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

2.02,9.01

5.07

5.02

No description available

Annual Report Scanned (Paper)

Definitive Proxy Statement

1.01,9.01

5.02,9.01

No description available

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Annual report pursuant to Section 13 or 15(d)

2.02,9.01

8.01

No description available

General form for quarterly reports under Section 13 or 15(d)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

General form for quarterly reports under Section 13 or 15(d)

No description available

General form for quarterly reports under Section 13 or 15(d)

Annual Report Scanned (Paper)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

No description available

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Prospectus Supplement for Primary Offering

General form for quarterly reports under Section 13 or 15(d)

Free Writing Prospectus

Notice of Effectiveness

Registration statement under Securities Act of 1933

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

SILVERMAN JACOB

KRITZMACHER JOHN A

MATTHEWS NORMAN S

PARIS GORDON A

Levy Sander M.

KRUEGER HARVEY M

Gottdiener Noah

Puzzuoli Patrick Michael

LOVELL JEFFREY

BELKE ROBERT

Calamari Peter

Carapezzi William R JR

MARSCHKE BRETT

Forman Edward

Forman Edward

MARSCHKE BRETT

SILVERMAN JACOB

Puzzuoli Patrick Michael