PART IV ITEM 15 Exhibits and Financial Statement Schedules EXHIBIT 21 Subsidiaries of the Registrant CIGNA CORPORATION -  2012 Form  10-K E-5 Listed below are subsidiaries of Cigna Corporation as of December 31, 2012 with their jurisdictions of organization shown in parentheses. Those subsidiaries not listed would not, in the aggregate, constitute a ‘‘significant subsidiary’’ of Cigna Corporation, as that term is defined in Rule 1-02(w) of Regulation S-X. Cigna Holdings, Inc. (Delaware) I. Connecticut General Corporation (Connecticut) A. Benefits Management Corp. (Montana) i. Allegiance Life & Health Insurance Company, Inc. (Montana) ii. Allegiance Re, Inc. (Montana) B. Cigna Arbor Life Insurance Company (Connecticut) C. Cigna Behavioral Health, Inc. (Minnesota) i. Cigna Behavioral Health of California, Inc. (California) ii. Cigna Behavioral Health of Texas, Inc. (Texas) iii. MCC Independent Practice Association of New York, Inc. (New York) D. Cigna Dental Health, Inc. (Florida) i. Cigna Dental Health of California, Inc. (California) ii. Cigna Dental Health of Colorado, Inc. (Colorado) iii. Cigna Dental Health of Delaware, Inc. (Delaware) iv. Cigna Dental Health of Florida, Inc. (Florida) v. Cigna Dental Health of Illinois, Inc. (Illinois) vi. Cigna Dental Health of Kansas, Inc. (Kansas) vii. Cigna Dental Health of Kentucky, Inc. (Kentucky) viii. Cigna Dental Health of Maryland, Inc. (Maryland) ix. Cigna Dental Health of Missouri, Inc. (Missouri) x. Cigna Dental Health of New Jersey, Inc. (New Jersey) xi. Cigna Dental Health of North Carolina, Inc. (North Carolina) xii. Cigna Dental Health of Ohio, Inc. (Ohio) xiii. Cigna Dental Health of Pennsylvania, Inc. (Pennsylvania) xiv. Cigna Dental Health of Texas, Inc. (Texas) xv. Cigna Dental Health of Virginia, Inc. (Virginia) xvi. Cigna Dental Health Plan of Arizona, Inc. (Arizona) E. Cigna Health Corporation (Delaware) i. Healthsource, Inc. (New Hampshire) a. Cigna Healthcare of Arizona, Inc. (Arizona) b. Cigna Healthcare of California, Inc. (California) c. Cigna Healthcare of Colorado, Inc. (Colorado) d. Cigna Healthcare of Connecticut, Inc. (Connecticut) e. Cigna Healthcare of Florida, Inc. (Florida) f. Cigna Healthcare of Georgia, Inc. (Georgia) g. Cigna Healthcare of Illinois, Inc. (Illinois) h. Cigna Healthcare of Indiana, Inc. (Indiana) i. Cigna Healthcare of Maine, Inc. (Maine) j. Cigna Healthcare of Massachusetts, Inc. (Massachusetts) k. Cigna Healthcare Mid-Atlantic, Inc. (Maryland) l. Cigna Healthcare of New Hampshire, Inc. (New Hampshire) m. Cigna Healthcare of New Jersey, Inc. (New Jersey) n. Cigna Healthcare of New York, Inc. (New York) o. Cigna Healthcare of North Carolina, Inc. (North Carolina) p. Cigna Healthcare of Pennsylvania, Inc. (Pennsylvania) q. Cigna Healthcare of South Carolina, Inc. (South Carolina) r. Cigna Healthcare of St. Louis, Inc. (Missouri) s. Cigna Healthcare of Tennessee, Inc. (Tennessee) t. Cigna Healthcare of Texas, Inc. (Texas) u. Cigna Healthcare of Utah, Inc. (Utah)