-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, PClwZygN+5DAnarj/xRoMnPsOYw8P9lCS1x24NfUL5FJEr53/QOu/Ust3bqBXYXG 580R2mZALeIDMKasXrtWwQ== 0001169232-03-001355.txt : 20030214 0001169232-03-001355.hdr.sgml : 20030214 20030214134158 ACCESSION NUMBER: 0001169232-03-001355 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20030214 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: UBS AG CENTRAL INDEX KEY: 0001114446 STANDARD INDUSTRIAL CLASSIFICATION: NATIONAL COMMERCIAL BANKS [6021] IRS NUMBER: 000000000 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: BAHNHOFSTRASSE CITY: ZURICH STATE: V8 ZIP: 45 MAIL ADDRESS: STREET 1: BAHNHOFSTRASSE CITY: ZURICH STATE: V8 ZIP: 45 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: MPOWER HOLDING CORP CENTRAL INDEX KEY: 0001117042 STANDARD INDUSTRIAL CLASSIFICATION: TELEPHONE COMMUNICATIONS (NO RADIO TELEPHONE) [4813] IRS NUMBER: 522232143 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-59595 FILM NUMBER: 03565704 BUSINESS ADDRESS: STREET 1: 171 SULLY'S TRAIL STREET 2: STE 202 CITY: PITTSFORD STATE: NY ZIP: 14534 BUSINESS PHONE: 7162186550 MAIL ADDRESS: STREET 1: 171 SULLY'S TRAIL STREET 2: STE 202 CITY: PITTSFORD STATE: NY ZIP: 14534 SC 13G 1 d53690_sc13g.txt SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 MPOWER HOLDING CORP. (Name of Issuer) Common Stock (Title of Class of Securities) 62473L309 (CUSIP Number) December 31, 2002 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |X| Rule 13d-1(b) |_| Rule 13d-1(c) |_| Rule 13d-1(d) - -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) UBS AG 98-0186363 - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_| (b) |_| - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION Switzerland - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES 4,875,184 ----------------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY -0- ----------------------------------------------------------------- EACH 7. SOLE DISPOSITIVE POWER REPORTING 4,875,184 ----------------------------------------------------------------- PERSON 8. SHARED DISPOSITIVE POWER WITH -0- - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 4,875,184 - -------------------------------------------------------------------------------- 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* |_| - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 7.5% - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON* BK - -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! Item 1(a). Name of Issuer: MPOWER HOLDING CORP. Item 1(b). Address of Issuer's Principal Executive Offices: 175 Sully's Trail Suite 300 Pittsford, NY 14534 Item 2(a) Name of Person Filing: UBS AG ("UBSAG"). Item 2(b) Address of Principal Business Office: Bahnhofstrasse 45 8021, Zurich, Switzerland Item 2(c) Citizenship: Switzerland Item 2(d) Title of Class of Securities: Common Stock Item 2(e) CUSIP Number: 87162Q10 Item 3. Type of Person Filing: UBS AG is classified as a Bank as defined in section 3(a)(6) of the Act pursuant to no action relief granted by the staff of the Securities and Exchange Commission. Item 4 (a)-(c)(iv). Ownership: Items 5-11 of the cover page are incorporated by reference. Item 5. Ownership of Five Percent or Less of a Class: If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following |_|. Item 6. Ownership of More than Five Percent on Behalf of Another Person: Not applicable Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company: Identification: UBS Warburg LLC Classification: BD Item 8 Identification and Classification of Members of the Group: Not applicable Item 9 Notice of Dissolution of Group: Not Applicable Item 10 Certification: By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: February 14, 2003 UBS AG By: /s/ Robert C. Dinerstein By: /s/ Robert B. Mills Robert C. Dinerstein Robert B. Mills Managing Director Managing Director -----END PRIVACY-ENHANCED MESSAGE-----