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## EXHIBIT 21 Subsidiaries of the Registrant 

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) 

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