AET Aetna Inc. (delisted)

CUSIP NO: 00817Y108 13G Page 2 of 5 Pages


1. NAME OF REPORTING PERSON: STATE STREET CORPORATION

 I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON: 04-2456637

2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

 NOT APPLICABLE

3. SEC USE ONLY


4. CITIZENSHIP OR PLACE OF ORGANIZATION

 BOSTON, MASSACHUSETTS

5. SOLE VOTING POWER

 0 SHARES

6. SHARED VOTING POWER

 22,532,335

7. SOLE DISPOSITIVE POWER

 0

8. SHARED DISPOSITIVE POWER

 22,532,335

9. AGGREGATED AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 22,532,335

10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

 NOT APPLICABLE

11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

 6.2%

12. TYPE OF REPORTING PERSON

 HC


















CUSIP NO: 00817Y108 13G Page 3 of 5 Pages

ITEM 1.

 (A) NAME OF ISSUER
 AETNA

 (B) ADDRESS OF ISSUER`S PRINCIPAL EXECUTIVE OFFICES
 151 FARMINGTON AVENUE
 HARTFORD, CT 06156

ITEM 2.

 (A) NAME OF PERSON FILING

 STATE STREET CORPORATION AND ANY OTHER REPORTING PERSON
 IDENTIFIED ON THE SECOND PART OF THE COVER PAGES HERETO

 (B) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IN NONE,
 RESIDENCE

 STATE STREET FINANCIAL CENTER
 ONE LINCOLN STREET
 BOSTON, MA 02111
 (FOR ALL REPORTING PERSONS)

 (C) CITIZENSHIP: SEE ITEM 4 (CITIZENSHIP OR PLACE OF
 ORGANIZATION) OF COVER PAGES

 (D) TITLE OF CLASS OF SECURITIES

 COMMON STOCK

 (E) CUSIP NUMBER:

 00817Y108

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:

 SEE ITEM 12 (TYPE OF REPORTING PERSON) OF THE COVER PAGE
 FOR EACH REPORTING PERSON AND THE TABLE BELOW, WHICH EXPLAINS
 THE MEANING OF THE TWO LETTER SYMBOLS APPEARING IN ITEM 12 OF
 THE COVER PAGES.

 SYMBOL CATEGORY

 BK BANK AS DEFINED IN SECTION 3(A) (6) OF THE ACT.
 IC INSURANCE COMPANY AS DEFINED IN SECTION 3 (A) (19)
 OF THE ACT
 IC INVESTMENT COMPANY REGISTERED UNDER SECTION 8 OF
 THE INVESTMENT COMPANY ACT OF 1940.
 IA AN INVESTMENT ADVISOR IN ACCORDANCE WITH RULE
 13D-1(B) (1) (II) (E).
 EP AN EMPLOYEE BENEFIT PLAN OR ENDOWMENT FUND IN
 ACCORDANCE WITH RULE 13D-1(B) (1) (II) (F) .
 HC A PARENT HOLDING COMPANY OR CONTROL PERSON IN
 ACCORDANCE WITH RULE 13D-1(B)(1)(II) (G).
 SA A SAVINGS ASSOCIATIONS AS DEFINED IN SECTION 3(B)
 OF THE FEDERAL DEPOSIT INSURANCE ACT (12 U.S.C. 1813).
 CP 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.


CUSIP NO: 00817Y108 13G Page 4 of 5 Pages


ITEM 4. OWNERSHIP

 THE INFORMATION SET FORTH IN ROWS 5 THROUGH 11 OF THE COVER PAGE
 HERETO FOR EACH OF THE REPORTING PERSONS IS INCORPORATED
 HEREIN BY REFERENCE.

ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF 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 OR CONTROL PERSON

 SEE EXHIBIT 1 ATTACHED HERETO

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 ARE
HELD IN THE ORDINARY COURSE OF BUSINESS AND WERE NOT ACQUIRED AND ARE
NOT HELD FOR THE PURPOSE 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.

SIGNATURES

 AFTER REASONABLE INQUIRY AND TO THE BEST OF HIS KNOWLEDGE AND
BELIEF, EACH OF THE UNDERSIGNED CERTIFIES THAT THE INFORMATION SET FORTH
IN THIS STATEMENT IS TRUE, COMPLETE AND CORRECT.

09 February 2012
STATE STREET CORPORATION



/s/ JAMES J. MALERBA
EXECUTIVE VICE PRESIDENT,
CORPORATION CONTROLLER









CUSIP NO: 00817Y108 13G Page 5 of 5 Pages



 EXHIBIT 1



 THE FOLLOWING TABLE LISTS THE IDENTITY AND ITEM 3 CLASSIFICATION
OF EACH SUBSIDIARY OF STATE STREET CORPORATION, THE PARENT HOLDING
COMPANY, THAT BENEFICIALLY OWNS THE ISSUER`S COMMON STOCK. PLEASE
REFER TO ITEM 3 OF THE ATTACHED SCHEDULE 13G FOR A DESCRIPTION OF
EACH OF THE TWO-LETTER SYMBOLS REPRESENTING THE ITEM 3 CLASSIFICATION
BELOW.

SUBSIDIARY ITEM 3 CLASSIFICATION
STATE STREET GLOBAL ADVISORS FRANCE S.A. IA
STATE STREET BANK AND TRUST COMPANY BK
SSGA FUNDS MANAGEMENT, INC IA
STATE STREET GLOBAL ADVISORS LIMITED IA
STATE STREET GLOBAL ADVISORS LTD IA
STATE STREET GLOBAL ADVISORS, AUSTRALIA LIMITED IA
STATE STREET GLOBAL ADVISORS JAPAN CO., LTD. IA
STATE STREET GLOBAL ADVISORS, ASIA LIMITED IA

NOTE: ALL OF THE LEGAL ENTITIES ABOVE ARE DIRECT OR INDIRECT SUBSIDIARIES
OF STATE STREET CORPORATION.