UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-1) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) (Amendment No. 3) ADVO Inc. (Name of Issuer) --------------------------------------------------------- Common Stock (Title of Class of Securities) --------------------------------------------------------- 007585102 (CUSIP NUMBER) --------------------------------------------------------- David Aufhauser, Esq. UBS AG 299 Park Avenue New York, New York 10171 212-821-3000 (Name, address and telephone number of person authorized to receive notices and communications) --------------------------------------------------------- December 4, 2006 (Date of Event That Requires Filing of this Statement) --------------------------------------------------------- If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box. [ ] Note. Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent. * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). 1 ------------------------------------------------------------------------------- 1 Names and I.R.S. Identification Nos. of Reporting Persons UBS AG (for the benefit and on behalf of UBS Investment Bank, Wealth Management USA, and Global Wealth Management and Business Banking business groups of UBS AG) * See item 5 ------------------------------------------------------------------------------- 2 Check the Appropriate Box if a Member of a Group a [ ] b [ ] ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 Source of Funds BK.AF,WC ------------------------------------------------------------------------------- 5 Check box if disclosure of legal proceedings is required pursuant to Item 2(d) or 2(e) [X] ------------------------------------------------------------------------------- 6 Citizenship or Place of Organization Switzerland ------------------------------------------------------------------------------- 7. Sole Voting Power: 2,597,995 --------------------------------------------------------- 8. Shared Voting Power: Number of Shares Beneficially 0 Owned by --------------------------------------------------------- Each Reporting 9. Sole Dispositive Power: Person With: 2,597,995 --------------------------------------------------------- 10. Shared Dispositive Power: 0 ------------------------------------------------------------------------------- 11 Aggregate Amount Beneficially Owned by Each Reporting Person 2,597,995 ------------------------------------------------------------------------------- 12 Check if the Aggregate Amount in Row (11) Excludes Certain Shares [ ] ------------------------------------------------------------------------------- 13 Percent of Class Represented by Amount in Row (11) 8.17% ------------------------------------------------------------------------------- 14 Type of Reporting Person BK ------------------------------------------------------------------------------- 2 Item 1. Security and Issuer Common Stock ADVO, Inc. One Targeting Centre Windsor, CT 06095 Item 2. Identity and Background UBS AG Principal business: UBS AG is a major international banking and financial firm. UBS AG's principal business office is located at: Bahnhofstrasse 45 CH-8021, Zurich, Switzerland UBS AG, a Swiss banking corporation, is publicly owned, and its shares are listed on the Zurich, New York and Tokyo stock exchanges. Subsidiaries of UBS AG include UBS Securities LLC and UBS Financial Services Inc. Like most securities firms, UBS Securities LLC and UBS Financial Services Inc. are, and have been, defendant(s) in numerous legal actions brought by private plaintiffs relating to their securities businesses that allege various violations of federal and state securities laws. UBS Securities LLC and UBS Financial Services Inc. are wholly owned subsidiaries of UBS AG. UBS AG, a Swiss banking corporation, is publicly owned, and its shares are listed on the Zurich, New York and Tokyo stock exchanges. UBS AG files annual reports on Form 20-F with the SEC, and also files quarterly reports and certain other material information with the SEC under cover of Form 6-K. These reports are publicly available. These reports include material information about UBS Securities LLC matters, including information about any material litigation or administrative proceedings. Further, UBS AG, UBS Securities LLC and UBS Financial Services Inc., and other affiliated entities, like most large, full service investment banks and broker-dealers, receive inquiries and are sometimes involved in investigations by the Federal Reserve Bank, SEC, NYSE and various other regulatory organizations and government agencies. UBS AG and its affiliates and subsidiaries fully cooperate with the authorities in all such requests. UBS Securities LLC and UBS Financial Services Inc. regularly report to the National Association of Securities Dealers, Inc. on Form B-D and to the SEC on Schedule E to Form ADV investigations that result in orders. These reports are publicly available. Item 3. Source and Amount of Funds or Other Consideration The source of funds for the purchases of the Common Stock (as defined above in Item 1) was internal funds of UBS AG and the affiliates that purchased the subject securities and/or the available funds of clients if shares purchased on a discretionary basis for client accounts. Item 4. Purpose of Transaction The shares of Common Stock were acquired for investment and proprietary trading purposes and not with the purpose or effect of changing or influencing control of the Issuer. UBS AG and its affiliates review their respective holdings of the Issuer on an ongoing basis. Depending on such evaluations, UBS and its affiliates may from time to time in the future acquire additional shares in connection with such investment and risk arbitrage activities. Except as otherwise described herein, none of the reporting persons has any plans or proposals relating to or which would result in any of the transactions described in Items 4(a) - (j) of Schedule 13D. 3 Item 5. Interest in Securities of the Issuer (a)-(b) This filing reflects shares beneficially owned by UBS Investment Bank, Wealth Management USA and Global Wealth Management and Business Banking business groups of UBS AG (the "Business Groups"), through the following entities through those business groups: UBS AG London Branch UBS Portfolio LLC UBS AG Frankfurt UBS Ltd UBS Warburg Private Clients Ltd UBS AG Tokyo branch UBS AG (Switzerland) UBS Warburg Securities (Pty) Ltd (South Africa) UBS International Ltd UBS Warburg Securities Ltd Banco UBS Warburg S.A UBS Warburg Corretora de Cambio e Valores Mobiliarios S.A. UBS Warburg Trading S.A. UBS Bunting Warburg Inc UBS Capital Americas Investments III, Ltd. UBS Capital II LLC UBS Capital LLC UBS AG Brazil UBS Limited UBS Capital Americas Investments II Ltd SBC Equity Partners AG UBS Capital Asia Pacific Ltd UBS Capital Holdings LLC UBS Capital Jersey Ltd UBS Capital BV UBS (USA) Inc UBS Warburg AG (Frankfurt) UBS Securities Australia Ltd UBS Securities (Japan) Ltd UBS Securities LLC UBS Securities New Zealand Limited UBS New Zealand Limited UBS AG Australia Branch UBS Capital Markets LP \ UBS Capital Latin America LDC UBS Securities France SA UBS AG Canada Branch UBS Cayman Ltd. PaineWebber Capital Inc Paine Webber International Inc UBS Fiduciary Trust Company UBS Financial Services Incorporated of Puerto Rico UBS Americas Inc UBS Financial Services Inc. SRM LP (c) - As required, the following information below describes trading in the above mentioned class of securities that is considered reportable within the past sixty day or since the previous 13D filing. BUY/SELL DATE AMOUNT PRICE EXCHANGE BUY 11/24/2006 12,500 28.99 NYSE BUY 11/27/2006 66,500 28.91 NYSE BUY 11/28/2006 20,000 28.68 NYSE BUY 12/04/2006 400,000 28.51 NYSE The Reporting Person has sole voting and dispositive power over all of the shares reported above. 4 Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer UBS holdings include call options to acquire 631,100 shares of the common stock. Item 7. Material to be Filed as Exhibits None SIGNATURES After reasonable inquiry and to the best of the knowledge and belief of the undersigned, the undersigned certifies that the information set forth in this statement is true, complete and correct. UBS AG By: /s/ Edward Buscemi Edward Buscemi Executive Director By: /s/ Gordon Kiesling Gordon Kiesling Executive Director Date: December 5, 2006 5