SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12 (g) OF THE SECURITIES EXCHANGE ACT OF 1934 WARNER-LAMBERT COMPANY (Exact name of registrant as specified in its charter) Delaware 22-1598912 (State of incorporation) (I.R.S. employer identification number) 201 Tabor Road 07950-2693 Morris Plains, New Jersey (Zip Code) (Address of principal executive offices) Securities to be registered pursuant to Section 12(b) of the Act: Title of each class Name of each exchange on which to be so registered each class is to be registered ------------------- ------------------------------ Preferred Share Purchase Rights New York Stock Exchange Securities to be registered pursuant to Section 12(g) of the Act: None (Title of Class) ITEM 1 DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED. Warner-Lambert Company, a Delaware corporation (the "Company") and First Chicago Trust Company of New York, a New York corporation (the "Rights Agent") entered into an Amendment to the Rights Agreement dated as of November 3, 1999 (the "Amendment to Rights Agreement") amending the Amended and Restated Rights Agreement, dated as of March 25, 1997, between the Company and the Rights Agent (the "Rights Agreement") in order to, among other things, (x) amend Section 1(a) of the Rights Agreement to provide that neither American Home Products Corporation, a Delaware corporation ("AHP"), nor any of its Affiliates (as defined in the Rights Agreement) will become an Acquiring Person (as defined in the Rights Agreement) as a result of the execution of the Merger Agreement or Stock Option Agreement (each as defined in the Amendment to Rights Agreement) or the consummation of the transactions contemplated thereby and (y) amend Section 7(a) of the Rights Agreement to insert "or (iv) the Effective Time of the Merger" after the existing clause (iii). A copy of the Amendment to Rights Agreement is attached hereto as Exhibit 1 and is incorporated herein by reference. The foregoing description of the Amendment to Rights Agreement does not purport to be complete and is qualified in its entirety by reference to the Amendment to Rights Agreement. ITEM 2. EXHIBITS 1. Amendment to Rights Agreement, dated as of November 3, 1999, between Warner-Lambert Company and First Chicago Trust Company of New York, as Rights Agent. SIGNATURE Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized. Dated as of: November 12, 1999 WARNER-LAMBERT COMPANY By: /s/ Rae G. Paltiel ------------------------------- Name: Rae G. Paltiel Title: Secretary INDEX OF EXHIBITS Exhibit No. Description - ----------- ----------- 1. Amendment to Rights Agreement, dated as of November 3, 1999, between Warner-Lambert Company and First Chicago Trust Company of New York, as Rights Agent.