=========================================================================== 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 AMENDMENT NO. 2 UNUM CORPORATION (Exact name of registrant as specified in its charter) DELAWARE 01-0405657 (State of incorporation (IRS Employer or organization) Identification No.) 2211 Congress Street 04122 Portland, Maine (Zip Code) (address of principal executive offices) Securities to be registered pursuant to Section 12(b) of the Act: Name of exchange on Title of each Class which each class is to to be so registered to be registered Preferred Stock New York Stock Exchange, Inc. Purchase Rights Pacific Exchange Incorporated 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), check the following box. [ ] 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), check the following box. [ ] Securities Act registration statement file number to which this form relates: ...............(if applicable) Securities to be registered pursuant to Section 12(g) of the Act: None (Title of Class) 2 Item 1 of Form 8-A dated March 13, 1992 (as amended through June 21, 1996, the "Form 8-A"), of UNUM Corporation is hereby amended as follows: ITEM 1. DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED. Item 1 of the Form 8-A is hereby amended by adding the following paragraph at the end of Item 1 of the Form 8-A: On November 22, 1998, UNUM Corporation (the "Company") executed an amendment (the "Amendment") to the Rights Agreement, dated as of March 13, 1992, as amended (the "Rights Agreement"), between the Company and First Chicago Trust Company of New York, as Rights Agent. The Amendment provides that neither Provident Companies, Inc., a Delaware corporation ("Provident"), nor any of its respective Affiliates or Associates will become an Acquiring Person (as that term is defined in the Rights Agreement) as a result of the occurrence of any of the following: (i) the execution of the Agreement and Plan of Merger dated as of November 22, 1998, between the Company and Provident, (the "Merger Agreement"), the execution of the Stockholders Agreement (as defined in the Merger Agreement) or the Option Agreements (as defined in the Merger Agreement), (ii) the announcement of the Merger (as defined in the Merger Agreement), (iii) the acquisition of Common Stock of the Company pursuant to the Merger, the Merger Agreement or the Option Agreements or (iv) the consummation of the Merger or of the other transactions contemplated by the Merger Agreement, the Stockholders Agreement or the Option Agreements. The Amendment further provides that, despite the occurrence of any of the events described under (i), (ii), (iii) or (iv) above, a Distribution Date, Triggering Event or Stock Acquisition Date (as such terms are defined in the Rights Agreement) will not occur, no Rights will separate from the shares of Common Stock or otherwise become exercisable and no adjustment will be made pursuant to Sections 11 or 13 of the Rights Agreement. The foregoing description of the Amendment is qualified in its entirety by reference to the full text of the Amendment attached hereto as Exhibit A and incorporated herein by reference, to the Amendment No. 1 to the Rights Agreement attached as an exhibit to the Form 8-A/A filed on June 21, 1996, and to the Rights Agreement attached as an exhibit to the Form 8-A filed on March 13, 1992, and incorporated herein by reference. 3 ITEM 2. EXHIBITS. Exhibit No. Description 1.* Form of Rights Agreement, dated as of March 13, 1992, between UNUM Corporation and First Chicago Trust Company of New York which includes as Exhibit B thereto the Form of Rights Certificate. 2.** First Amendment, dated as of June 19, 1996, to the Rights Agreement. 3. Second Amendment, dated as of November 22, 1998, to the Rights Agreement. - ------------ [*Incorporated by reference to Exhibit 1 to Form 8-A filed March 18, 1992, File No. 1-09254] [**Incorporated by reference to Exhibit 2 to Amendment No. 1 to Form 8-A filed June 21, 1996, File No. 1-09254] 4 SIGNATURE Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned hereunto duly authorized. Date: November 25, 1998 UNUM CORPORATION. (Registrant) By: /s/ Robert E. Broatch ----------------------------- Name: Robert E. Broatch Title: Senior Vice President & Chief Financial Officer 5 EXHIBIT INDEX Exhibit No. Description 1.* Form of Rights Agreement, dated as of March 13, 1992, between UNUM Corporation and First Chicago Trust Company of New York which includes as Exhibit B thereto the Form of Rights Certificate. 2.** First Amendment, dated as of June 19, 1996, to the Rights Agreement. 3. Second Amendment, dated as of November 22, 1998, to the Rights Agreement. - ------------ [*Incorporated by reference to Exhibit 1 to Form 8-A filed March 18, 1992, File No. 1-09254] [**Incorporated by reference to Exhibit 2 to Amendment No. 1 to Form 8-A filed June 21, 1996, File No. 1-09254]