UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G
                    Under the Securities Exchange Act of 1934

	      	 INFORMATION TO BE INCLUDED IN STATEMENTS FILED
	     PURSUANT TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS
 		       THERETO FILED PURSUANT TO 13d-2(b)

                               CIGNA CORPORATION
                                (Name of Issuer)

                                 Common Stock
                         (Title of Class of Securities)

                                  125509109
                                (CUSIP Number)

                               October 27, 2011
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ ] Rule 13d-1(b)

[X] Rule 13d-1(c)

[ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



                               CUSIP No. 125509109


       1.    Names of Reporting Person
             I.R.S. Identification Nos. of above person (entities only)

             Owl Creek I, L.P.

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [x] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             Delaware, United States

       		 5.  Sole Voting Power: 0
Number of
Shares           6.  Shared Voting Power:  205,871
Beneficially
Owned by         7.  Sole Dispositive Power:  0
Each Reporting
Person With      8.  Shared Dispositive Power:  205,871

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

             205,871

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

       11.   Percent of Class Represented by Amount in Row (9)

	     0.08%

       12.   Type of Reporting Person

	     PN



                               CUSIP No. 125509109

       1.    Names of Reporting Person
             I.R.S. Identification Nos. of above person (entities only)

             Owl Creek II, L.P.

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [x] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             Delaware, United States

       		 5.  Sole Voting Power:  0
Number of
Shares           6.  Shared Voting Power:  3,181,870
Beneficially
Owned by         7.  Sole Dispositive Power:  0
Each Reporting
Person With      8.  Shared Dispositive Power:  3,181,870

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

             3,181,870

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

       11.   Percent of Class Represented by Amount in Row (9)

	     1.18%

       12.   Type of Reporting Person

	     PN




                               CUSIP No. 125509109

       1.    Names of Reporting Person
             I.R.S. Identification Nos. of above person (entities only)

             Owl Creek Overseas Master Fund, Ltd.

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [x] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             Cayman Islands

       		 5.  Sole Voting Power:  0
Number of
Shares           6.  Shared Voting Power:  10,157,438
Beneficially
Owned by         7.  Sole Dispositive Power:  0
Each Reporting
Person With      8.  Shared Dispositive Power:  10,157,438

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

             10,157,438

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

       11.   Percent of Class Represented by Amount in Row (9)

	     3.76%

       12.   Type of Reporting Person

	     FI




                               CUSIP No. 125509109

       1.    Names of Reporting Person
             I.R.S. Identification Nos. of above person (entities only)

             Owl Creek SRI Master Fund, Ltd.

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [x] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             Cayman Islands

       		 5.  Sole Voting Power:  0
Number of
Shares           6.  Shared Voting Power:  285,967
Beneficially
Owned by         7.  Sole Dispositive Power:  0
Each Reporting
Person With      8.  Shared Dispositive Power:  285,967

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

             285,967

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

       11.   Percent of Class Represented by Amount in Row (9)

	     0.11%

       12.   Type of Reporting Person

	     FI




     				CUSIP No. 125509109

       1.    Names of Reporting Person
             I.R.S. Identification Nos. of above person (entities only)

             Owl Creek Advisors, LLC

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [x] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             Delaware, United States

       		 5.  Sole Voting Power:  0
Number of
Shares           6.  Shared Voting Power:  13,831,146
Beneficially
Owned by         7.  Sole Dispositive Power:  0
Each Reporting
Person With      8.  Shared Dispositive Power:  13,831,146

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

             13,831,146

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

       11.   Percent of Class Represented by Amount in Row (9)

	     5.12%

       12.   Type of Reporting Person

	     CO



                               CUSIP No. 125509109


       1.    Names of Reporting Person
             I.R.S. Identification Nos. of above person (entities only)

             Owl Creek Asset Management, L.P.

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [x] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             Delaware, United States

       		 5.  Sole Voting Power:  0
Number of
Shares           6.  Shared Voting Power: 13,831,146
Beneficially
Owned by         7.  Sole Dispositive Power:  0
Each Reporting
Person With      8.  Shared Dispositive Power:   13,831,146

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

             13,831,146

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

       11.   Percent of Class Represented by Amount in Row (9)

	     5.12%

       12.   Type of Reporting Person

	     PN




                               CUSIP No. 125509109

       1.    Names of Reporting Person
             I.R.S. Identification Nos. of above person (entities only)

             Jeffrey A. Altman

       2.    Check the Appropriate Box if a Member Of a Group

             [ ] (a)
             [x] (b)

       3.    SEC Use Only

       4.    Citizenship or Place of Organization

             United States

       		 5.  Sole Voting Power:  0
Number of
Shares           6.  Shared Voting Power:  13,896,771
Beneficially
Owned by         7.  Sole Dispositive Power:  0
Each Reporting
Person With      8.  Shared Dispositive Power:  13,896,771

       9.    Aggregate Amount Beneficially Owned by Each Reporting Person

             13,896,771

       10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

       11.   Percent of Class Represented by Amount in Row (9)

	     5.14%

       12.   Type of Reporting Person

	     IN



Item 1. (a)  Name of Issuer:

	     CIGNA CORPORATION (the "Issuer")

        (b)  Address of Issuer's Principal Executive Offices:

	     900 Cottage Grove Road
	     Bloomfield, Connecticut 06002

Item 2. (a)  Name of Person Filing:

	     This statement is filed by:

	     (i) Owl Creek I, L.P., a Delaware limited partnership ("Owl Creek
	     I"), with respect to the shares of Common Stock directly owned by it;

	     (ii) Owl Creek II, L.P., a Delaware limited partnership ("Owl Creek
	     II"), with respect to the shares of Common Stock directly owned by it;

	     (iii) Owl Creek Overseas Master Fund, Ltd., an exempted company
	     organized under the laws of the Cayman Islands ("Owl Creek Overseas"),
	     with respect to the shares of Common Stock directly owned by it;

   	     (iv) Owl Creek SRI Master Fund, Ltd., an exempted company
	     organized under the laws of the Cayman Islands ("Owl Creek SRI"),
	     with respect to the shares of Common Stock directly owned by it;

 	     (v) Owl Creek Advisors, LLC, a Delaware limited liability company,
	     the general partner with respect to the shares of Common Stock
	     directly owned by Owl Creek I and Owl Creek II and the manager with
	     respect to the shares of Common Stock directly owned by Owl Creek
	     Overseas and Owl Creek SRI;

	     (vi) Owl Creek Asset Management, L.P. a Delaware limited partnership,
	     the investment manager with respect to the shares of Common Stock
	     directly owned by Owl Creek I, Owl Creek II, Owl Creek Overseas, and
	     Owl Creek SRI; and

	     (vii) Jeffrey A. Altman, with respect to shares of Common Stock owned
	     by Owl Creek I, Owl Creek II, Owl Creek Overseas and Owl Creek
	     SRI.The shares reported by Jeffrey A. Altman also include shares held
	     in a foundation for which Jeffrey A. Altman may be deemed to have
             beneficial ownership.

	     The foregoing persons are hereinafter sometimes collectively referred
	     to as the "Reporting Persons." Any disclosures herein with respect to
	     persons other than the Reporting Persons are made on information and
	     belief after making inquiry to the appropriate party.

        (b)  Address of Principal Business Office or, if None, Residence:

             The address of the principal business office of each of the
	     Reporting Persons is 640 Fifth Avenue, 20th Floor, New York,NY
             10019.

        (c)  Citizenship:

             Each of Owl Creek I, Owl Creek II, and Owl Creek Asset Management,
	     L.P.is a limited partnership organized under the laws of the State
	     of Delaware. Each of Owl Creek Overseas and Owl Creek SRI is an
	     exemptedcompany organized under the laws of the Cayman Islands.
	     Owl CreekAdvisors, LLC is a limited liability company organized
	     under the lawsof the State of Delaware. Mr. Altman is a United
	     States citizen.

        (d)  Title of Class of Securities

             Common Stock (the "Common Stock")

        (e)  CUSIP Number: 125509109

Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or
        (c), Check Whether the Person Filing is a:

        (a) |_| Broker or dealer registered under section 15 of the Act;

        (b) |_| Bank as defined in section 3(a)(6) of the Act;

        (c) |_| Insurance company as defined in section 3(a)(19) of the Act;

        (d) |_| Investment company registered under section 8 of the
	        Investment Company Act of 1940;

        (e) |_| An investment adviser in accordance with Rule 13d-1
		(b) (1) (ii) (E);

        (f) |_| An employee benefit plan or endowment fund in accordance
		with Rule 13d-1 (b) (1) (ii) (F);

        (g) |_| A parent holding company or control person in accordance
		with Rule 13d- 1 (b) (1) (ii) (G);

        (h) |_| A savings associations as defined in Section 3(b) of the
                Federal Deposit Insurance Act (12 U.S.C. 1813);

        (i) |_| A church plan that is excluded from the definition of an
                investment company under section 3(c)(14) of the Investment
                Company Act of 1940;

        (j) |_| Group, in accordance with Rule 13d-1 (b) (1) (ii) (J).

	Not Applicable

Item 4. Ownership

	The percentages used herein and in the rest of Item 4 are calculated
	based upon the 270,197,763 shares Common Stock that are outstanding
	as of July 15, 2011 as reported by the Company in its Form 10-Q for
	the quarterly period ended June 30, 2011, filed on August 4, 2011.

         A. Owl Creek I, L.P.

		(a) Amount beneficially owned:  205,871
		(b) Percent of class:  0.08%
		(c)(i) Sole power to vote or direct the vote: 0
		  (ii) Shared power to vote or direct the vote:  205,871
		 (iii) Sole power to dispose or direct the disposition: 0
		  (iv) Shared power to dispose or direct the disposition:
		       205,871

	As of the date of this filing, the Reporting Person may be deemed to
	be the beneficial owner of 205,871 shares of the Company's common
	stock which includes 89,700 shares that could be acquired if
	897 option contracts were exercised.

	 B. Owl Creek II, L.P.

		(a) Amount beneficially owned:  3,181,870
		(b) Percent of class:  1.18%
		(c)(i) Sole power to vote or direct the vote: 0
		  (ii) Shared power to vote or direct the vote:  3,181,870
		 (iii) Sole power to dispose or direct the disposition: 0
		  (iv) Shared power to dispose or direct the disposition:
		       3,181,870

	As of the date of this filing, the Reporting Person may be deemed to
	be the beneficial owner of 3,181,870 shares of the Company's common
	stock which includes 1,380,200 shares that could be acquired if
	13,802 option contracts were exercised.

         C. Owl Creek Overseas Master Fund, Ltd.

		(a) Amount beneficially owned: 10,157,438
		(b) Percent of class: 3.76%
		(c)(i) Sole power to vote or direct the vote: 0
		  (ii) Shared power to vote or direct the vote:  10,157,438
		 (iii) Sole power to dispose or direct the disposition: 0
		  (iv) Shared power to dispose or direct the disposition:
		       10,157,438

	As of the date of this filing, the Reporting Person may be deemed to
	be the beneficial owner of 10,157,438 shares of the Company's common
	stock which includes 4,406,200 shares that could be acquired if
	44,602 option contracts were exercised.

	 D. Owl Creek SRI Master Fund, Ltd.

		(a) Amount beneficially owned:  285,967
		(b) Percent of class:  0.11%
		(c)(i) Sole power to vote or direct the vote: 0
		  (ii) Shared power to vote or direct the vote:  285,967
		 (iii) Sole power to dispose or direct the disposition: 0
		  (iv) Shared power to dispose or direct the disposition:
		       285,967

	As of the date of this filing, the Reporting Person may be deemed to
	be the beneficial owner of 285,967 shares of the Company's common
	stock which includes 123,900 shares that could be acquired if 1,239
	option contracts were exercised.

	 E. Owl Creek Advisors, LLC

		(a) Amount beneficially owned:  13,831,146
		(b) Percent of class:5.12%
		(c)(i) Sole power to vote or direct the vote: 0
		  (ii) Shared power to vote or direct the vote:  13,831,146
		 (iii) Sole power to dispose or direct the disposition: 0
		  (iv) Shared power to dispose or direct the disposition:
		       13,831,146

	As of the date of this filing, the Reporting Person may be deemed to
	be the beneficial owner of 13,831,146 shares of the Company's common
	stock which includes 6,000,000 shares that could be acquired if
	60,000 option contracts were exercised.

	 F. Owl Creek Asset Management, L.P.

		(a) Amount beneficially owned:  13,831,146
		(b) Percent of class: 5.12%
		(c)(i) Sole power to vote or direct the vote: 0
		  (ii) Shared power to vote or direct the vote:  13,831,146
		 (iii) Sole power to dispose or direct the disposition: 0
		  (iv) Shared power to dispose or direct the disposition:
		       13,831,146

	As of the date of this filing, the Reporting Person may be deemed to
	be the beneficial owner of 13,831,146 shares of the Company's common
	stock which includes 6,000,000 shares that could be acquired if
	60,000 option contracts were exercised.

	 G. Jeffrey A. Altman

		(a) Amount beneficially owned:  13,896,771
		(b) Percent of class:  5.14%
		(c)(i) Sole power to vote or direct the vote: 0
		  (ii) Shared power to vote or direct the vote:  13,896,771
		 (iii) Sole power to dispose or direct the disposition: 0
		  (iv) Shared power to dispose or direct the disposition:
		       13,896,771

	As of the date of this filing, the Reporting Person may be deemed to
	be the beneficial owner of 13,896,771 shares of the Company's common
	stock which includes 6,000,000 shares that could be acquired if
	60,000 option contracts were exercised.




Item 5.  Ownership of Five Percent or Less of a Class

         Not Applicable

Item 6.  Ownership of More than Five Percent on Behalf of Another Person

	 Not Applicable

Item 7.  Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company

         Not Applicable

Item 8.  Identification and Classification of Members of the Group

         Not Applicable

Item 9.  Notice of Dissolution of Group

         Not Applicable

Item 10. Certification

         By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and held in the ordinary
course of business and were not acquired and are not held for the purpose of or
with the effect of changing or influencing the control of the issuer of the
securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.





                                 SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date:  October 27, 2011
                                      /s/ Jeffrey A. Altman

                                      --------------------------
                                      Jeffrey A. Altman, individually, and as
				      managing member of Owl Creek Advisors, LLC,
				      for itself and as general partner of Owl
	  			      Creek I, L.P. and Owl Creek II L.P., and
				      as managing member of the general partner
				      of OWl Creek Asset Management, L.P., for
		   		      itself and as investment manager to Owl
				      Creek Overseas Master Fund, Ltd. and Owl
				      Creek SRI Master Fund, Ltd.