Unum Group (UNM)

(Former name or former address, if changed since last report)

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On September 21, 2009, the Human Capital Committee of Unum Group (the “Company”), a Delaware corporation, approved an agreement by and between Robert C. Greving, Executive Vice President and Chief Actuary and former Chief Financial Officer of the Company, and the Company to be effective as of the date of his retirement from the Company (September 30, 2009). Pursuant to the agreement Mr. Greving will (a) provide general consulting services to the Company in respect of the business of the Company and (b) make himself reasonably available to the Company to consult on specific projects for the Company, in each case, as may be reasonably requested from time to time by the Company. The term of this engagement shall be one year beginning on the date of retirement (the “Consulting Period”).

For the term of the agreement, Mr. Greving will be subject to a covenant not to directly or indirectly compete with the Company, without the prior written consent of the Company.

In consideration of the foregoing, the Company will pay Mr. Greving (i) $200,000 on March 30, 2010, (ii) $100,000 on June 30, 2010, and (iii) $100,000 on September 30, 2010 (for a total of $400,000 for the Consulting Period), in each case, so long as Mr. Greving continues to be available to provide the services on the applicable payment date. The Company will reimburse Mr. Greving pursuant to the Company’s usual reimbursement policies for any reasonable business expenses incurred by Mr. Greving in connection with the performance of the consulting services.

(Former name or former address, if changed since last report.)

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Users of the data included in this current report on Form 8-K are advised pursuant to Rule 401 of Regulation S-T that the financial information contained in these documents formatted in Extensible Business Reporting Language (“XBRL”) is unaudited and unreviewed and is not the official publicly filed financial statements of Unum Group (the “Company”). The purpose of submitting these XBRL formatted documents is solely to test the related format and technology. As a result, investors should rely on the financial information included in the Company’s annual report on Form 10-K filed on February 21, 2008 and should not rely on the information included in this current report in making investment decisions.

Exhibit 100 to this Current Report on Form 8-K contains documents formatted in XBRL with information from the Company’s annual report on Form 10-K for the Year ended December 31, 2007, filed with the Securities and Exchange Commission on February 21, 2008. The information formatted in XBRL includes (i) the Consolidated Balance Sheets at December 31, 2007 and December 31, 2006, (ii) the Consolidated Statements of Income, Stockholders’ Equity, Cash Flows and Comprehensive Income (Loss) for each of the three years in the period ended December 31, 2007, and (iii) the related Financial Statement Footnotes and Schedules.

In accordance with Rule 402 of Regulation S-T, the information in this Current Report on Form 8-K, including Exhibit 100, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any filing or other document pursuant to the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing or document.

(d) Exhibits. The following exhibit is filed or furnished with this Report:

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On April 30, 2008, Unum Group (“Unum Group” or the “Company”), a Delaware corporation, issued a press release reporting its results for the first quarter of 2008, a copy of which is furnished herewith as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Also on April 30, 2008, Unum Group posted on its website at www.unum.com the Statistical Supplement relating to its financial results for the first quarter of 2008. A copy of the Statistical Supplement is furnished herewith as Exhibit 99.2 and incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information included or incorporated in this Item 2.02, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall such information and exhibits be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

(Former name or former address, if changed since last report.)

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On February 13, 2008, Unum Group announced that Charles L. Glick, Executive Vice President and General Counsel, notified the company on February 8, 2008 that he was resigning effective March 31, 2008 to take a position closer to his family in Chicago.

The Company will undertake a search for a permanent General Counsel. In the interim, Liston Bishop III, a partner with Miller & Martin in Chattanooga, Tennessee will serve as Acting General Counsel upon Mr. Glick’s departure.

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On January 28, 2008, Unum Group (“Unum Group” or the “Company”), a Delaware corporation, issued a press release reporting its results for the fourth quarter of 2007, a copy of which is furnished herewith as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Also on January 28, 2008, Unum Group posted on its website at www.unum.com the Statistical Supplement relating to its financial results for the fourth quarter of 2007. A copy of the Statistical Supplement is furnished herewith as Exhibit 99.2 and incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information included or incorporated in this Item 2.02, including Exhibits 99.1 and 99.2, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall such information and exhibits be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

On January 28, 2008, Unum Group posted on its website at www.unum.com updated information with regard to its claim reassessment process for the fourth quarter of 2007.

In accordance with General Instruction B.2 of Form 8-K, the information included or incorporated in this Item 7.01, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

(Former name or former address, if changed since last report.)

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(Former name, former address and former fiscal year, if changed since last report)

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On August 24, 2007, Unum Group issued a press release announcing that the Company’s Executive Vice President, Chief Financial Officer and Chief Actuary, Robert C. Greving, has adopted a trading plan pursuant to Rule 10b5-1 of the Securities and Exchange Act of 1934.

The information contained in this Current Report on Form 8-K, pursuant to Item 8.01, including Exhibit 99.1, is being furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that Section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. The furnishing of the information set forth under this Item 8.01 is not intended to, and does not, constitute a determination or admission as to the materiality or completeness of such information.

A copy of the press release is attached hereto as Exhibit 99.1 and furnished herewith.

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

(Former name or former address, if changed since last report)

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On March 7, 2007, Hugh O. Maclellan, Jr. informed the Registrant of his decision to not stand for re-election and his intention to retire when his term expires at the 2007 Annual Meeting of Stockholders.

A copy of the press release announcing the retirement of Mr. Maclellan is attached hereto as Exhibit 99.1 and incorporated herein by reference.

The following exhibit is filed as part of this Report on Form 8-K:

(Former name or former address, if changed since last report)

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(Former name or former address, if changed since last report)

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(b) UnumProvident Corporation announced today that Joseph M. Zubretsky, Senior Executive Vice President of Finance, Investments and Corporate Development, notified the Company on February 6, 2007 that he is resigning effective February 28, 2007, to take a position with another company closer to his family in the Northeast.

A copy of the press release announcing the resignation of Mr. Zubretsky is attached hereto as Exhibit 99.1 and incorporated herein by reference.

(d) Exhibits. The following exhibit is filed with this Report:

(Former name or former address, if changed since last report)

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(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer  x                    Accelerated Filer  ¨                    Non-accelerated Filer  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  ¨    No  x

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Item 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard: Transfer of Listing

UnumProvident Corporation’s corporate governance principles state that the Chairman of the Board presides at all executive sessions of the non-management directors and that the non-management directors will meet in executive session at all regularly scheduled meetings of the Board of Directors. The Company’s 2006 proxy statement for its 2006 annual meeting of stockholders included references to the Company’s corporate governance principles and stated that they are available at its webpage, www.unumprovident.com.

The Commentary to Section 303A.03 of the New York Stock Exchange (NYSE) Listed Company Manual requires each listed company to disclose in its proxy statement the name of the director chosen to preside at executive sessions of non-management directors or the procedure by which a presiding director is selected for each executive session. On September 20, 2006, the NYSE notified the Company that it was considered deficient in meeting the above requirement and provided until September 27, 2006 to cure the deficiency. The NYSE’s notice states that the disclosure deficiency may be cured by including the required disclosure in a Current Report on Form 8-K. Accordingly, concurrent with the filing of this Current Report on Form 8-K, the Company believes that it has cured this deficiency.

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one): Large Accelerated Filer  x    Accelerated Filer  ¨    Non-accelerated Filer  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On August 2, 2006, UnumProvident Corporation issued a press release reporting its results for the second quarter of 2006, a copy of which is furnished herewith as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Also on August 2, 2006, UnumProvident Corporation posted on its website at www.unumprovident.com the Statistical Supplement relating to its financial results for the second quarter of 2006. A copy of the Statistical Supplement is furnished herewith as Exhibit 99.2 and incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information included or incorporated in this Item 2.02, including Exhibits 99.1 and 99.2 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall such information and exhibits be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

(c) Exhibits. The following exhibits are filed with this Report: