Sec Form 4 Filing - CARMICHAEL DAVID M @ Ensco plc - 2010-05-25

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person CARMICHAEL DAVID M 2. Issuer Name and Ticker or Trading Symbol Ensco plc [ ESV] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 500 N. AKARD STREET, SUITE 4300 3. Date of Earliest Transaction (MM/DD/YY) 05/25/2010 (Street) DALLAS, TX75201-3331 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price American Depositary Shares 05/25/2010 J( 1 ) 12,320 ( 2 ) A $ 38.99 12,320 ( 2 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Non-Employee Director Stock Option (Right to Buy) $ 50.28 05/25/2010 J( 1 ) 4,500 ( 3 ) 06/01/2006 06/01/2013 American Depositary Shares 4,500 ( 3 ) $ 50.28 4,500 ( 3 ) D Non-Employee Director Stock Option (Right to Buy) $ 60.74 05/25/2010 J( 1 ) 4,500 ( 4 ) 06/01/2007 06/01/2014 American Depositary Shares 4,500 ( 4 ) $ 60.74 4,500 ( 4 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other CARMICHAEL DAVID M 500 N. AKARD STREET SUITE 4300 DALLAS, TX75201-3331 X Signatures /s/ Robert O. Isaac, by Power of Attorney 05/26/2010 Signature of Reporting Person Date

Explanation of Responses:

( 1 )No changes in benefical ownership of securities have taken place. This filing has been accomplished to reflect the total beneficial ownership of Ensco securities at retirmement from the Ensco Board of Directors on May 25, 2010. ( 2 )Amount is representative of all beneficially owned American Depositary Shares and All Non-Employee Director Restricted Stock Grants, which vested on May 25, 2010, at retirement from the Ensco Board of Directors. ( 3 )Amount is representative of a Non-Employee Director Stock Option, which was fully vested at grant date, and outstanding on May 25, 2010 at retirement from the Ensco Board of Directors. The Non-Employee Director Stock Option is exerciable until June 1, 2013. ( 4 )Amount is representative of a Non-Employee Director Stock Option, which was fully vested at grant date, and outstanding on May 25, 2010 at retirement from the Ensco Board of Directors. The Non-Employee Director Stock Option is exerciable until June 1, 2014.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.