SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 ---------- FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(B) OR (G) OF THE SECURITIES EXCHANGE ACT OF 1934 UBS AG UBS PREFERRED FUNDING UBS PREFERRED FUNDING COMPANY LLC IV TRUST IV (Exact name of Registrant as (Exact name of Registrant as (Exact name of Registrant Specified in its Charter) Specified in its Charter) as Specified in its Charter) SWITZERLAND 98-0186363 DELAWARE APPLIED FOR DELAWARE APPLIED FOR (State or Other (I.R.S. Employer (State or Other (I.R.S. Employer (State or Other (I.R.S. Employer Jurisdiction of Identification Jurisdiction of Identification Jurisdiction of Identification Incorporation or Number) Incorporation or Number) Incorporation or Number) Organization) Organization) Organization) BAHNHOFSTRASSE 45, ZURICH, C/O WILMINGTON TRUST COMPANY THE CORPORATION TRUST COMPANY SWITZERLAND, 011 41-1-234 11 11 AND 1100 NORTH MARKET STREET 1209 ORANGE STREET AESCHENVORSTADT 1, BASEL, WILMINGTON, DELAWARE 19890 WILMINGTON, DELAWARE 19801 SWITZERLAND, 011 41-61-288 20 20 302-651-118 302-658-7581 (Address and Telephone Number of (Address and Telephone Number of (Address and Telephone Number of Registrant's Principal Executive Offices) Registrant's Principal Executive Offices) Registrant's Principal Executive Offices) If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A. (c), please check the following box. [X] If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A. (d), please check the following box. [ ] Securities Act registration file number to which this form relates: 333-62448 Securities to be registered pursuant to Section 12(b) of the Act: Title of Each Class Name of Each Exchange on to be so Registered Which Each Class is to be Registered ------------------- ------------------------------------ Trust Preferred Securities of UBS Funding Trust IV New York Stock Exchange, Inc. Company Preferred Securities of UBS Preferred Funding LLC IV New York Stock Exchange, Inc.* Subordinated Guarantee of UBS AG with respect to the New York Stock Exchange, Inc.* Noncumulative Company Preferred Securities. Securities to be registered pursuant to Section 12(g) of the Act: None - ---------- * Not for trading, but only in connection with the registration of the Trust Preferred Securities. INFORMATION REQUIRED IN REGISTRATION STATEMENT Item 1. DESCRIPTION OF REGISTRANTS' SECURITIES TO BE REGISTERED. The description of the securities to be registered hereby is incorporated by reference to the description that appears under the captions "Description of Trust Preferred Securities", "Description of Company Preferred Securities" and "Description of UBS AG Subordinated Guarantee" in the Prospectus relating to the Registrants' Registration Statement on Form F-3 (the "Form F-3") under the Securities Act of 1933, as amended, as filed with the Securities and Exchange Commission (the "SEC") on December 19, 2002, as amended (File No. 333-64844). Item 2. EXHIBITS The following exhibits have been incorporated by reference into this registration statement filed with the SEC. Exhibit No. Description ----------- ----------- 4.1 Form of Amended and Restated Trust Agreement of UBS Preferred Funding Trust IV of the Trust (incorporated herein by reference to Exhibit 4.5 to the Form F-3). 4.2 Form of Amended and Restated Limited Liability Agreement of UBS Preferred Funding Company LLC IV (incorporated herein by reference to Exhibit 4.7 to the Form F-3). 4.3 Form of Subordinated Guarantee Agreement for UBS Preferred Funding Company LLC IV (incorporated by reference to Exhibit 4.9 to the Form F-3). 25.2 Statement of Eligibility on Form T-1 of Wilmington Trust Company, as Trustee for UBS Preferred Funding Trust IV (incorporated herein by reference to Exhibit 25.2 to the Form F-3) SIGNATURE Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the Registrants have duly caused this registration statement thereto to be signed on its behalf by the undersigned, thereto duly authorized. Date: May 22, 2003 UBS AG By: /S/ Robert Mills ---------------------------------- Name: Robert Mills Title: Managing Director By: /S/ Mark Ritter --------------------------------- Name: Mark Ritter Title: Managing Director UBS Preferred Funding Company LLC IV By: /S/ Robert Mills --------------------------------- Name: Robert Mills Title: President and Managing Director By: /S/ Mark Ritter --------------------------------- Name: Mark Ritter Title: Vice President UBS Preferred Funding Trust IV By: UBS Preferred Funding Company LLC IV, as Grantor By: /S/ Robert Mills --------------------------------- Name: Robert Mills Title: President and Manging Director By: /S/ Mark Ritter --------------------------------- Name: Mark Ritter Title: Vice President