PENTON MEDIA INC

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

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

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

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

Material Modifications to Rights of Security Holders

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

8.01,9.01

8.01,9.01

Additional Information for Proxy Statement/ Votes

Other Events

Additional Information for Proxy Statement/ Votes

8.01,9.01

Additional Information for Proxy Statement/ Votes

No description available

8.01,9.01

Additional Information for Proxy Statement/ Votes

8.01,9.01

No description available

Additional Information for Proxy Statement/ Votes

7.01,9.01

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

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

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

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

1.01,8.01,9.01

Additional Information for Proxy Statement/ Votes

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

Regulation FD Disclosure

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

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

1.01

1.01,8.01,9.01

Regulation FD Disclosure

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

Regulation FD Disclosure

Definitive Proxy Statement

Preliminary Proxy Statement

Regulation FD Disclosure

Annual report pursuant to Section 13 or 15(d)

Entry into a Material Definitive Agreement

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

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

7.01,9.01

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

Entry into a Material Definitive Agreement

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

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

Regulation FD Disclosure

8.01,9.01

Definitive Proxy Statement

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

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

Notification of late filing of Form 10-Q

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

Annual report pursuant to Section 13 or 15(d)

Notification of late filing of Form 10-K

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

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

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Definitive Proxy Statement

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

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)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

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

Definitive Proxy Statement

Preliminary Proxy Statement

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

Additional Information for Proxy Statement/ Votes

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Registration of Securities on Exchange (amendment)

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Registration statement under Securities Act of 1933

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

Required Information in Proxy Statement

No description available

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

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

Definitive Proxy Statement

Registration statement under Securities Act of 1933

Preliminary Proxy Statement

06

06

Registration of Securities on Exchange (amendment)

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Definitive Proxy Statement

Registration statement under Securities Act of 1933

Prospectus Supplement with Pricing Information

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

DENNY DARRELL C

VICE PRESTON L

NUSSBAUM DAVID B

USEP II Co-Investment Partners, LLC; U.S. EQUITY PARTNERS II (U.S. Parallel), LP; U.S. EQUITY PARTNERS II (Offshore), LP; U.S. EQUITY PARTNERS II, LP; Prism Business Media Holdings, LLC

Wasserstein Partners (Offshore), Ltd; WASSERSTEIN INVESTMENTS, LLC; WASSERSTEIN HOLDINGS, LLC; Prism Business Media Holdings, Inc.; Wasserstein Bruce; Wasserstein Partners, LP; WASSERSTEIN & CO., LP

Powers David

GREENE R DOUGLAS

Kingshott Adrian

Levy Harlan A