UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K GLYPH<c4988>  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2012 OR GLYPH<H18554>  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from   to  Commission file number 1-8323 CIGNA CORPORATION (Exact name of registrant as specified in its charter) DELAWARE (State or other jurisdiction of incorporation or organization) 900 Cottage Grove Road, Bloomfield, Connecticut (Address of principal executive offices) 06-1059331 (I.R.S. Employer Identification No.) 06002 (Zip Code) (860) 226-6000 Registrant’s telephone number, including area code (860) 226-6741 Registrant’s facsimile number, including area code Name of each exchange on which registered New York Stock Exchange, Inc. Title of each class Common Stock, Par Value $0.25 SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT: SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT: NONE Indicate by check mark YES NO GLYPH<c4988> if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. GLYPH<H18554> GLYPH<c4988> if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. GLYPH<H18554> 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 GLYPH<c4988> (2) has been subject to such filing requirements for the past 90 days. GLYPH<H18554> whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such GLYPH<c4988> shorter period that the registrant was required to submit and post such files). GLYPH<H18554> if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of GLYPH<c4988> this Form 10-K or any amendment to this Form 10-K. GLYPH<H18554> GLYPH<127> whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of ‘‘large accelerated filer’’, ‘‘accelerated filer’’, and ‘‘smaller reporting company’’ in Rule 12b-2 of the Exchange Act. Large accelerated filer  GLYPH<c4988> Accelerated filer  GLYPH<H18554> Non-accelerated filer  GLYPH<H18554> Smaller Reporting Company  GLYPH<H18554> GLYPH<c4988> whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). GLYPH<H18554> GLYPH<127> GLYPH<127> GLYPH<127> GLYPH<127> GLYPH<127> GLYPH<127> The aggregate market value of the voting stock held by non-affiliates of the registrant as of June 29, 2012 was approximately $12.7 billion. As of January 31, 2013, 285,954,499 shares of the registrant’s Common Stock were outstanding. Part III of this Form 10-K incorporates by reference information from the registrant’s proxy statement to be dated on or about March 15, 2013.