INDEX TO EXHIBITS With regard to applicable cross-references in this report, our current, quarterly and annual reports dated on or after May 1, 2003 are filed with the Securities and Exchange Commission under File No. 1-11294 and such reports dated prior to May 1, 2003 are filed with the Securities and Exchange Commission under File No. 1-11834, except as otherwise noted below. Our registration statements have the file numbers noted wherever such statements are identified below. (3.1) Amended and Restated Certificate of Incorporation of Unum Group, effective May 24, 2018 (incorporated by reference to Exhibit 3.1 of our Form 8-K filed on May 25, 2018). (3.2) Amended and Restated Bylaws of Unum Group, effective February 19, 2019 (incorporated by reference to Exhibit 3.1 of Unum Group's Form 8-K filed on February 22, 2019). (4.1) Indenture for Senior Debt Securities dated as of March 9, 2001 (incorporated by reference to Exhibit 4.1 of our Registration Statement on Form S-3 (Registration No. 333-100953) filed on November 1, 2002). (4.2) Second Supplemental Indenture, dated as of June 18, 2002, between Unum Group and JPMorgan Chase Bank, as Trustee (incorporated by reference to Exhibit 4.2 of our Form 8-K filed on June 21, 2002). (4.3) Indenture for Senior Debt Securities between Unum Group and The Bank of New York Mellon Trust Company, N.A. as Trustee dated as of September 30, 2009 (incorporated by reference to Exhibit 4.2 of our Form 8-K filed on September 30, 2009). (4.4) Form of 5.625% Senior Note due 2020 (incorporated by reference to Exhibit 4.1 of our Form 8-K filed on September 15, 2010). (4.5) Indenture for Senior Debt Securities, dated as of August 23, 2012, between Unum Group and The Bank of New York Mellon Trust Company, N.A., as Trustee (incorporated by reference to Exhibit 4.2 of our Form 8-K filed on August 23, 2012). (4.6) Form of 5.75% Senior Note due 2042 (incorporated by reference to Exhibit 4.1 of our Form 8-K filed on August 23, 2012). (4.7) Form of 4.000% Senior Note due 2024 (incorporated by reference to Exhibit 4.1 of our Form 8-K filed on March 14, 2014). (4.8) Form of 3.875% Senior Note due 2025 (incorporated by reference to Exhibit 4.1 of our Form 8-K filed on November 5, 2015). (4.9) Indenture for Subordinated Debt Securities, dated as of May 29, 2018, between Unum Group and The Bank of New York Mellon Trust Company, N.A., as Trustee (incorporated by reference to Exhibit 4.2 of Unum Group’s Form 8-K filed on May 29, 2018). (4.10) Form of 6.250% Junior Subordinated Notes due 2058 (incorporated by reference to Exhibit 4.1 of Unum Group's Form 8- K filed on May 29, 2018). (4.11) Form of 4.000% Senior Notes due 2029 (incorporated by reference to Exhibit 4.1 of Unum Group's Form 8-K filed on June 13, 2019). (4.12) Form of 4.500% Senior Notes due 2049 (incorporated by reference to Exhibit 4.1 of Unum Group's Form 8-K filed on September 11, 2019). (10.1) Agreement between Provident Companies, Inc. and certain subsidiaries and American General Corporation and certain subsidiaries dated as of December 8, 1997 (incorporated by reference to Exhibit 10.18 of Provident Companies Inc.'s Form 10-Q for fiscal quarter ended September 30, 1998). (10.2)  Form of Change in Control Severance Agreement, as amended (incorporated by reference to Exhibit 10.8 of our Form 10-K for the fiscal year ended December 31, 2008). * (10.3) Form of Change in Control Severance Agreement, effective April 25, 2011 (incorporated by reference to Exhibit 10.3 of our Form 10-K for the fiscal year ended December 31, 2014). * (10.4) Form of Change in Control Severance Agreement, effective January 1, 2015 (incorporated by reference to Exhibit 10.4 of our Form 10-K for the fiscal year ended December 31, 2014). * (10.5) Form of Change in Control Severance Agreement, effective August 14, 2018 (incorporated by reference to Exhibit 10.5 of our Form 10-K for the fiscal year ended December 31, 2018). * Certain instruments defining the rights of holders of long-term debt securities of our company and our subsidiaries are omitted pursuant to Item 601(b)(4)(iii) of Regulation S-K. We hereby undertake to furnish to the Securities and Exchange Commission, upon request, copies of any such instruments. 212