SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 11-K  

	
		
(Mark One)	
ý	ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2012	

	
	
OR	

	
		
o	TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
For the transition period from _______ to ________	

	
	
Commission File Number 1-8097	

	

A.	Full title of the plan and the address of the plan, if different from that of the issuer named below:

	
	
Ensco Multinational Savings Plan	

	
		
B.	Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:	

	
	
Ensco plc
6 Chesterfield Gardens
London, England W1J 5BQ	

1

ENSCO MULTINATIONAL SAVINGS PLAN
TABLE OF CONTENTS TO FINANCIAL STATEMENTS
AND SUPPLEMENTAL INFORMATION

	
		
Financial Statements:	 	
 	 	
Report of Independent Registered Public Accounting Firm	1	
 	 	
Statement of Net Assets Available for Benefits	 	
as of December 31, 2012	2	
 	 	
Statement of Net Assets Available for Benefits	 	
as of December 31, 2011	3	
 	 	
Statement of Changes in Net Assets Available for Benefits	 	
as of December 31, 2012	4	
 	 	
Statement of Changes in Net Assets Available for Benefits	 	
as of December 31, 2011	5	
 	 	
Notes to Financial Statements	6	
 	 	
Supplemental Information:	 	
 	 	
Schedule I - Investments as of December 31, 2012	11	
 	 	
Signature	12	
 	 	
Exhibits:	 	
 	 	
Consent of Independent Registered Public Accounting Firm	 	

2

Report of Independent Registered Public Accounting Firm

To the Trustees of and Plan Administrator of the
Ensco Multinational Savings Plan

We have audited the accompanying statements of net assets available for benefits of the Ensco Multinational Savings Plan as of December 31, 2012 and 2011 and the related statements of changes in net assets available for benefits for the years then ended. These financial statements are the responsibility of the Plan's management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. An audit includes consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Ensco Multinational Savings Plan as of December 31, 2012 and 2011, and the changes in its net assets available for benefits for the years then ended in conformity with accounting principles generally accepted in the United States of America.

Our audits were conducted for the purpose of forming an opinion on the financial statements referred to above. The supplemental schedule of Schedule I - Investments as of December 31, 2012, is presented for the purpose of additional analysis and is not a required part of the financial statements. Such information has been subjected to the auditing procedures applied in the audit of the financial statements and, in our opinion, is fairly stated in all material respects in relation to the financial statements referred to above taken as a whole.

/s/ Whitley Penn LLP
Fort Worth, Texas
March 28, 2013

1

 
ENSCO MULTINATIONAL SAVINGS PLAN
STATEMENT OF NET ASSETS AVAILABLE FOR BENEFITS
AS OF DECEMBER 31, 2012

	
																																									
 	 	Total	 	Ensco plc
Class A
Ordinary Shares	 	Invesco AIM
US Dollar
Liquidity
Portfolio	 	MFS Meridian
Global Equity
Fund	 	Pioneer Funds-
North American
Basic Value	 	Templeton
Global Bond
Fund	 	Skandia
Total Return
USD Bond
Fund	 	MFS Meridian
Global
Total Return
Fund	 	Other Mutual
Funds	 	Cash	
ASSETS:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Investments at fair value:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Other investments (cost $12,017,273)	 	$	12,677,294		 	$	—		 	$	4,588,684		 	$	1,804,735		 	$	1,148,079		 	$	1,389,532		 	$	1,246,845		 	$	995,382		 	$	1,504,037		 	$	—		
Ensco plc Class A ordinary shares (cost $2,269,199)	 	2,689,593		 	2,689,593		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	—		
Total investments	 	15,366,887		 	2,689,593		 	4,588,684		 	1,804,735		 	1,148,079		 	1,389,532		 	1,246,845		 	995,382		 	1,504,037		 	—		
Cash	 	317,039		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	317,039		
Receivables:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Employee contributions	 	439,396		 	57,437		 	139,542		 	47,310		 	30,152		 	37,183		 	32,370		 	19,516		 	75,886		 	—		
Employer contributions	 	6,478,204		 	780,840		 	2,519,237		 	632,099		 	358,885		 	487,001		 	436,658		 	283,485		 	943,818		 	36,181		
Total receivables	 	6,917,600		 	838,277		 	2,658,779		 	679,409		 	389,037		 	524,184		 	469,028		 	303,001		 	1,019,704		 	36,181		
NET ASSETS AVAILABLE FOR BENEFITS	 	$	22,601,526		 	$	3,527,870		 	$	7,247,463		 	$	2,484,144		 	$	1,537,116		 	$	1,913,716		 	$	1,715,873		 	$	1,298,383		 	$	2,523,741		 	$	353,220		
The accompanying notes are an integral part of these financial statements.

2

ENSCO MULTINATIONAL SAVINGS PLAN
STATEMENT OF NET ASSETS AVAILABLE FOR BENEFITS
AS OF DECEMBER 31, 2011

	
																																									
 	 	Total	 	Ensco plc
American
Depositary Shares	 	Invesco AIM
US Dollar
Liquidity
Portfolio	 	MFS Meridian
Global Equity
Fund	 	Pioneer Funds-
North American
Basic Value	 	Templeton
Global Bond
Fund	 	Skandia
Total Return
USD Bond
Fund	 	MFS Meridian
Global
Total Return
Fund	 	Other Mutual Funds	 	Cash	
ASSETS:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Investments at fair value:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Other investments (cost $6,074,488)	 	$	6,297,753		 	$	—		 	$	2,342,681		 	$	861,426		 	$	673,062		 	$	728,266		 	$	667,799		 	$	601,523		 	$	422,996		 	$	—		
Ensco plc American depositary shares (cost $1,438,666)	 	1,475,165		 	1,475,165		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	—		
Total investments	 	7,772,918		 	1,475,165		 	2,342,681		 	861,426		 	673,062		 	728,266		 	667,799		 	601,523		 	422,996		 	—		
Cash	 	164,042		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	164,042		
Receivables:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Employee contributions	 	92,038		 	12,756		 	28,195		 	9,918		 	9,421		 	9,547		 	8,233		 	7,746		 	6,222		 	—		
Employer contributions	 	1,458,080		 	199,817		 	578,877		 	156,169		 	107,320		 	118,091		 	99,179		 	96,965		 	91,977		 	9,685		
Total receivables	 	$	1,550,118		 	$	212,573		 	$	607,072		 	$	166,087		 	$	116,741		 	$	127,638		 	$	107,412		 	$	104,711		 	$	98,199		 	$	9,685		
NET ASSETS AVAILABLE FOR BENEFITS	 	$	9,487,078		 	$	1,687,738		 	$	2,949,753		 	$	1,027,513		 	$	789,803		 	$	855,904			$	775,211		 	$	706,234		 	$	521,195		 	$	173,727		
The accompanying notes are an integral part of these financial statements.

3

ENSCO MULTINATIONAL SAVINGS PLAN
STATEMENT OF CHANGES IN NET ASSETS AVAILABLE
FOR BENEFITS
YEAR ENDED DECEMBER 31, 2012

	
																																									
 	 	Total	 	Ensco plc
Class A
Ordinary Shares	 	Invesco AIM
US Dollar
Liquidity
Portfolio	 	MFS Meridian
Global Equity
Fund	 	Pioneer Funds-
North American
Basic Value	 	Templeton
Global Bond
Fund	 	Skandia
Total Return
USD Bond
Fund	 	MFS Meridian
Global
Total Return
Fund	 	Other Mutual
Funds	 	Cash	
ADDITIONS TO NET ASSETS ATTRIBUTED TO:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Investment income:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Interest and dividends	 	$	61,036		 	$	59,883		 	$	828		 	$	—		 	$	—		 	$	—		 	$	—		 	$	—		 	$	—		 	$	325		
Realized gains	 	250,888		 	61,686		 	—		 	9,914		 	57,069		 	37,558		 	21,810		 	28,399		 	34,452		 	—		
Unrealized appreciation	 	909,019		 	460,664		 	—		 	199,602		 	16,952		 	102,516		 	60,801		 	33,433		 	35,051		 	—		
Total investment income	 	1,220,943		 	582,233		 	828		 	209,516		 	74,021		 	140,074		 	82,611		 	61,832		 	69,503		 	325		
Contributions:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Participant	 	4,671,171		 	592,437		 	1,568,287		 	512,954		 	309,453		 	383,171		 	344,594		 	216,747		 	743,528		 	—		
Employer	 	8,958,766		 	1,081,495		 	3,524,778		 	876,029		 	493,305		 	678,327		 	597,732		 	388,713		 	1,280,702		 	37,685		
Total contributions	 	13,629,937		 	1,673,932		 	5,093,065		 	1,388,983		 	802,758		 	1,061,498		 	942,326		 	605,460		 	2,024,230		 	37,685		
DEDUCTIONS FROM NET ASSETS ATTRIBUTED TO:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Distributions to participants	 	(1,736,057	)	 	(366,740	)	 	(737,721	)	 	(148,162	)	 	(124,535	)	 	(110,523	)	 	(57,821	)	 	(74,883	)	 	(92,919	)	 	(22,753	)	
Administrative expenses	 	(375	)	 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	(375	)	
Total deductions	 	(1,736,432	)	 	(366,740	)	 	(737,721	)	 	(148,162	)	 	(124,535	)	 	(110,523	)	 	(57,821	)	 	(74,883	)	 	(92,919	)	 	(23,128	)	
TRANSFERS, NET	 	—		 	(49,293	)	 	(58,462	)	 	6,294		 	(4,931	)	 	(33,237	)	 	(26,454	)	 	(260	)	 	1,732		 	164,611		
NET INCREASE	 	13,114,448		 	1,840,132		 	4,297,710		 	1,456,631		 	747,313		 	1,057,812		 	940,662		 	592,149		 	2,002,546		 	179,493		
NET ASSETS AVAILABLE FOR BENEFITS:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Beginning of year	 	9,487,078		 	1,687,738		 	2,949,753		 	1,027,513		 	789,803		 	855,904		 	775,211		 	706,234		 	521,195		 	173,727		
End of year	 	$	22,601,526		 	$	3,527,870		 	$	7,247,463		 	$	2,484,144		 	$	1,537,116		 	$	1,913,716		 	$	1,715,873		 	$	1,298,383		 	$	2,523,741		 	$	353,220		
The accompanying notes are an integral part of these financial statements.

4

ENSCO MULTINATIONAL SAVINGS PLAN
STATEMENT OF CHANGES IN NET ASSETS AVAILABLE
FOR BENEFITS
YEAR ENDED DECEMBER 31, 2011

	
																																									
 	 	Total	 	Ensco plc
American
Depositary Shares	 	Invesco AIM
US Dollar
Liquidity
Portfolio	 	MFS Meridian
Global Equity
Fund	 	Pioneer Funds-
North American
Basic Value	 	Templeton
Global Bond
Fund	 	Skandia
Total Return
USD Bond
Fund	 	MFS Meridian
Global
Total Return
Fund	 	Other Mutual Funds	 	Cash	
ADDITIONS TO NET ASSETS ATTRIBUTED TO:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Investment income:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Interest and dividends	 	$	43,526		 	$	42,706		 	$	627		 	$	—		 	$	—		 	$	—		 	$	—		 	$	—		 	$	—		 	$	193		
Realized gains	 	102,799		 	23,616		 	—		 	31,458		 	13,476		 	6,424		 	10,131		 	5,244		 	12,450		 	—		
Unrealized depreciation	 	(480,148	)	 	(241,380	)	 	—		 	(86,905	)	 	(67,981	)	 	(32,825	)	 	(1,378	)	 	(3,700	)	 	(45,979	)	 	—		
Total investment (loss) income	 	(333,823	)	 	(175,058	)	 	627		 	(55,447	)	 	(54,505	)	 	(26,401	)	 	8,753		 	1,544		 	(33,529	)	 	193		
Contributions:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Participant	 	1,108,935		 	162,776		 	322,863		 	128,461		 	114,214		 	117,185		 	107,298		 	83,374		 	72,764		 	—		
Employer	 	2,008,910		 	286,242		 	743,262		 	222,837		 	157,072		 	172,140		 	146,072		 	142,803		 	128,797		 	9,685		
Total contributions	 	3,117,845		 	449,018		 	1,066,125		 	351,298		 	271,286		 	289,325		 	253,370		 	226,177		 	201,561		 	9,685		
DEDUCTIONS FROM NET ASSETS ATTRIBUTED TO:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Distributions to participants	 	(504,298	)	 	(102,600	)	 	(242,492	)	 	(32,910	)	 	(31,727	)	 	(18,817	)	 	(29,531	)	 	(16,490	)	 	(27,207	)	 	(2,524	)	
Administrative expenses	 	(475	)	 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	—		 	(475	)	
Total deductions	 	(504,773	)	 	(102,600	)	 	(242,492	)	 	(32,910	)	 	(31,727	)	 	(18,817	)	 	(29,531	)	 	(16,490	)	 	(27,207	)	 	(2,999	)	
TRANSFERS, NET	 	—		 	(117,039	)	 	124,408		 	(36,056	)	 	(4,740	)	 	(3,244	)	 	(10,799	)	 	132		 	14,308		 	33,030		
NET INCREASE	 	2,279,249		 	54,321		 	948,668		 	226,885		 	180,314		 	240,863		 	221,793		 	211,363		 	155,133		 	39,909		
NET ASSETS AVAILABLE FOR BENEFITS:	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	
Beginning of year	 	7,207,829		 	1,633,417		 	2,001,085		 	800,628		 	609,489		 	615,041		 	553,418		 	494,871		 	366,062		 	133,818		
End of year	 	$	9,487,078		 	$	1,687,738		 	$	2,949,753		 	$	1,027,513		 	$	789,803		 	$	855,904		 	$	775,211		 	$	706,234		 	$	521,195		 	$	173,727		
The accompanying notes are an integral part of these financial statements.

5

ENSCO MULTINATIONAL SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
1. PLAN ORGANIZATION AND DESCRIPTION
The Ensco Multinational Savings Plan (the “Plan”) is a defined contribution plan available to international expatriate employees (“Eligible Employees”) of Ensco plc and subsidiaries (the “Company” or “Ensco”). The Plan was established on January 1, 2009 to provide a retirement benefit for Eligible Employees through Company profit sharing contributions and matching contributions based on Eligible Employee contributions, and to promote and encourage Eligible Employees to provide additional security and income for their retirement through a systematic savings program. Based upon current law and published interpretations, the Company does not believe that the Plan is subject to any of the provisions of the U.S. Employee Retirement Income Security Act of 1974, as amended. The following description of the Plan provides only general information. Participants in the Plan (“Plan Participants”) should refer to the Plan document for a more complete description of the Plan’s provisions.
Participation
Eligible Employees of the Company may participate in the Plan upon meeting certain citizenship or residency requirements if they are not employed in their own country of tax residency and are not contributing to, or receiving benefits from, any other employer-sponsored savings plan. Eligible Employees may elect to participate in the employee savings feature of the Plan immediately following employment with the Company.
Eligible Employees automatically participate in the profit sharing feature of the Plan after completing at least 92 days of continuous full-time employment if they are employed at calendar year-end. The profit sharing contributions of the Company are at the discretion of the Board of Directors as disclosed below.
Contributions
Plan Participants may elect to make contributions to the Plan through salary and cash incentive award deferrals (“Savings Contributions”), which may or may not qualify for tax deferral based on each Plan Participant’s local tax requirements. Under the Plan, Savings Contributions are limited to 50% of the participant’s compensation and Plan Participants may elect to increase, decrease or suspend their Savings Contributions within certain limits, as defined in the Plan.
At the discretion of its Board of Directors, the Company may make contributions to the Plan (“Matching Contributions”). Matching Contributions may be made by the Company in the form of a stated dollar amount or in the form of a matching percentage of Savings Contributions. The Company made Matching Contributions to active participant Eligible Employee accounts as follows:

				
 	Matching Percentage	
 	2012	 	2011	
First 5% of eligible compensation	100%	 	100%	
Total Matching Contributions for the years ended December 31, 2012 and 2011 were $2,734,892 and $602,820, respectively.

At the discretion of its Board of Directors following the close of a fiscal year, the Company may also make annual profit sharing contributions to the Plan for the benefit of all Plan Participants (“Profit Sharing Contributions”). Annual Profit Sharing Contributions are allocated to Plan Participants based on their proportionate compensation. The 2012 and 2011 Profit Sharing contributions were awarded in cash in March 2013 and March 2012 and totaled $6,223,874 and $1,406,090, respectively. The 2012 and 2011 Profit Sharing Contributions were included in employer contributions in the statements of changes in net assets available for benefits for the years ended December 31, 2012 and 2011, respectively.
Plan Administration
Assets in the Plan are held in trust by Citco Trustees (Cayman) Limited as original trustee on behalf of, and for the benefit of, Plan Participants. The Board of Directors selected the trustee upon the recommendation of Company management. The trustee has the authority to manage or dispose of Plan assets as if it were the beneficial owner thereof. However, the trustee and the Company have delegated the management of day-to-day investment elections and administration of the Plan to Global Group Services Incorporated, the administrator, and UBS Financial, Inc., the custodian. Global Group Services Incorporated performs all recordkeeping services.

6

Vesting
A Plan Participant’s Matching Contribution account balance and Profit Sharing Contribution account balance become vested and nonforfeitable upon the completion of years of service with the Company, as follows:

	
			
Completed years of service	Vested percentage	
Less than one year	—	%	
One year	33	%	
Two years	67	%	
Three or more years	100	%	
A Plan Participant shall become fully vested in his or her Matching Contribution account balance and Profit Sharing Contribution account balance upon certain events, including death or disability, attaining the age of 65 or a period of service with the Company of at least three years, or a full termination of the Plan. A Plan Participant’s Savings Contribution account balance is fully vested at all times.
The unvested portion of Matching Contribution account balances and Profit Sharing Contribution account balances of terminated Plan Participants are forfeited to the Plan and may be used to pay certain administrative expenses of the Plan or to reduce the amount of future employer contributions. The Plan held forfeiture balances totaling $253,856 and $120,971 included in net assets available for benefits as of December 31, 2012 and 2011, respectively. The Plan did not use its forfeiture balance to reduce any portion of the Company’s Matching Contributions during the years ended December 31, 2012 and 2011.
Distributions
Distributions of a Plan Participant’s Savings Contribution account and the vested portion of a participant’s Matching Contribution account and Profit Sharing Contribution account generally are made within 60 days of an employee request due to termination of employment. As of December 31, 2012 and 2011, all Plan Participants who had elected to withdraw from the Plan had been paid.

Hardship Withdrawals
Should a Plan Participant experience a hardship, he or she may elect to withdraw all or part of his or her vested account balance from the Plan. All cases of hardship must be presented in writing to, and approved by, the Company. The Company may request additional supporting documentation from Plan Participants to substantiate any case of hardship. The Company may, at its discretion, approve all or part of the withdrawal request. Hardship withdrawals are recorded as distributions in the period in which they are paid. Hardship withdrawals totaling $26,003 were paid during the year ended December 31, 2012. No hardship withdrawls were paid during the year ended December 31, 2011.
Investments
The Plan allows participants to direct all contributions among a number of different investment funds held by UBS Financial, Inc., including Ensco plc Class A Ordinary Shares of the Company (the “Ensco Class A Fund”). On May 22, 2012, the Company terminated its American depositary shares ("ADS") facility and its outstanding ADSs were converted into Class A ordinary shares on a one-for-one basis. In connection with the termination of the ADS facility and the conversion to Class A ordinary shares, the Plan was amended by the Company, effective January 1, 2012, to convert outstanding Ensco ADSs to Class A ordinary shares of the Company.
Additionally, the Plan limits the portion of a participant’s aggregate account balance that may be invested in the Ensco Class A Fund to 25 percent. The daily value of each investment unit is determined by dividing the total fair market value of all assets in each fund by the total number of units in that fund. Investment income, including certain administrative fees and net appreciation (depreciation) of the fair value of investments, is allocated to each Plan Participant’s account based on the change in unit value for each investment fund in which the participant has an account balance.
Reclassification
Certain amounts included in employer contributions receivable in the statement of net assets available for benefits in the prior year have been reclassified to employee contributions receivable to conform to the current year presentation.

7

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Method of Accounting
The Plan’s financial statements are prepared on the accrual basis of accounting.
The Plan’s investments are stated at fair value using quoted market prices. Shares of mutual funds are valued at the net asset value of shares held by the Plan at year-end and there are no redemption restrictions associated with those investments. Purchases and sales of shares in mutual funds and the Ensco Class A Fund are recorded on a trade-date basis. Interest is recorded on the accrual basis and dividends are recorded on the ex-dividend date. See “Note 4 - Fair Value Measurements” for additional information on the fair value measurement of the Plan’s net assets.
The Plan presents in the statement of changes in net assets available for benefits the realized gains and/or losses and the unrealized appreciation (depreciation) on investments, which are calculated based on beginning of the year market values of investments to the date of sale and the purchase price, if purchased during the year, to the end of the year market value.
Estimates
The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires the Plan Sponsor, Ensco, to make estimates and assumptions that affect the reported amounts of assets and liabilities and related changes in net assets available for benefits, as well as disclosures of gain and loss contingencies at the date of the financial statements. Actual results could differ from those estimates.
Distributions
Distributions of benefits to Plan Participants are recorded when paid.
3. PLAN INVESTMENTS
As of December 31, 2012 and 2011, the Plan’s investment options included the following:
Ensco Class A Fund: Previously, this fund was invested in the Company’s ADSs, evidenced by an American Depositary Receipt, which represented a Class A ordinary share of Ensco plc. In connection with the termination of the Company's ADS facility, the Plan was amended, effective January 1, 2012, so that all outstanding Ensco ADSs were converted into Class A ordinary shares on a one-for-one basis. The fund had 393 and 107 participants as of December 31, 2012 and 2011, respectively.
Invesco AIM US Dollar Liquidity Portfolio: This money market fund seeks to provide investors with a high level of current income, while preserving capital and maintaining liquidity by investing in a portfolio of high quality US dollar denominated short-term money market instruments. The fund had 515 and 146 participants as of December 31, 2012 and 2011, respectively.
MFS Meridian Global Equity Fund: This mutual fund seeks to provide investors capital appreciation by investing in a portfolio of equity securities of global issuers. The fund had 319 and 72 participants as of December 31, 2012 and 2011, respectively.
Pioneer Funds-North American Basic Value: This mutual fund seeks to provide investors capital appreciation over the medium to long-term by investing in a portfolio of equities and equity-linked instruments issued by companies that have their registered office in North America or that exercise the preponderant part of their economic activity in North America. The fund had 264 and 65 participants as of December 31, 2012 and 2011, respectively.
Templeton Global Bond Fund: This mutual fund seeks to provide investors a maximum total return, consisting of a combination of interest income, capital appreciation and currency gains by investing in a portfolio of fixed income securities worldwide. The fund had 314 and 70 participants as of December 31, 2012 and 2011, respectively.
Skandia Total Return USD Bond Fund: This mutual fund seeks to provide investors both current income and capital appreciation by investing in a portfolio of intermediate-term investment grade securities. The fund had 304 and 75 participants as of December 31, 2012 and 2011, respectively.
MFS Meridian Global Total Return Fund: This mutual fund seeks to provide investors total return by investing in a portfolio of large-cap equity securities and investment grade government bonds. As of December 31, 2012, the fund represented less than 5% of total net assets available for benefits under the Plan and had 208 participants. As of December 31, 2011, the fund had 58 participants.
Legg Mason Global Funds-Royce Smaller Companies: This mutual fund seeks to provide investors long-term capital appreciation by investing in a portfolio of equity securities issued by mid-cap and small-cap companies with stock market

8

capitalizations of less than US $5 billion. As of December 31, 2012, the fund represented less than 5% of total net assets available for benefits under the Plan and had 146 participants. As of December 31, 2011, the fund had 58 participants.
Morgan Stanley Global Property Fund: This mutual fund seeks to provide investors long-term capital appreciation by investing in a portfolio of companies in the real estate industry based around the world. As of December 31, 2012, the fund, which was a new investment option for the Plan during 2012, represented less than 5% of total net assets available for benefits under the Plan and had 182 participants.
Franklin U.S. Opportunities Fund: This mutual fund seeks to provide investors long-term capital appreciation by investing in equity securities of small, medium and large U.S. companies that have strong growth potential. As of December 31, 2012, the fund, which was a new investment option for the Plan during 2012, represented less than 5% of total net assets available for benefits under the Plan and had 184 participants.
Templeton Emerging Markets Fund: This mutual fund seeks to provide investors long-term capital appreciation by investing equity securities of emerging market companies which derive a significant proportion of their revenues or profits from emerging economies. As of December 31, 2012, the fund, which was a new investment option for the Plan during 2012, represented less than 5% of total net assets available for benefits under the Plan and had 196 participants.

During 2012 and 2011 the Plan’s investments, including gains and losses on investments bought and sold, as well as held during the year, appreciated (depreciated) in value as follows:

									
 	 	2012	 	2011	
Proceeds	 	$	1,937,421		 	$	673,605		
Aggregate cost	 	1,686,533		 	570,806		
Realized gains	 	250,888		 	102,799		
Unrealized appreciation/(depreciation)	 	909,019		 	(480,148	)	
Net appreciation/(depreciation) in fair value of investments	 	$	1,159,907		 	$	(377,349	)	
4. FAIR VALUE MEASUREMENTS
Certain provisions of FASB ASC 820-10 establish a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy assigns the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (“Level 1”) and the lowest priority to unobservable inputs (“Level 3”). Level 2 measurements are inputs that are observable for assets or liabilities, either directly or indirectly, other than quoted prices included within Level 1. The following fair value hierarchy table categorizes information regarding the Plan’s net assets measured at fair value on a recurring basis as of December 31, 2012 and 2011:

																	
 	 	Quoted Prices
in Active 
Markets for
Identical Assets
(Level 1)	 	Significant
Other
Observable
Inputs
(Level 2)	 	Significant
Unobservable
Inputs
(Level 3)	 	Total	
As of December 31, 2012	 	 	 	 	 	 	 	 	
Other investments	 	$	12,677,294		 	$	—		 	$	—		 	$	12,677,294		
Ensco Class A Fund	 	2,689,593		 	—		 	—		 	2,689,593		
Total investments	 	$	15,366,887		 	$	—		 	$	—		 	$	15,366,887		
As of December 31, 2011	 	 	 	 	 	 	 	 	
Other investments	 	$	6,297,753		 	$	—		 	$	—		 	$	6,297,753		
Ensco ADS Fund	 	1,475,165		 	—		 	—		 	1,475,165		
Total investments	 	$	7,772,918		 	$	—		 	$	—		 	$	7,772,918		
5. ADMINISTRATIVE FEES
The Plan has no employees. All administrative expenses of the Plan have been paid by the Company. Fees paid by the participants and the Plan for investment management and other related services amounted to approximately $375 and $475 for the years ended December 31, 2012 and 2011, respectively.

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6. PLAN TERMINATION
Although it has not expressed any intent to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan. In the event of Plan termination, participants will become 100% vested in their accounts.
7. TAX STATUS
The Plan is not qualified under Section 401(a) of the United States Internal Revenue Code of 1986, as amended.
In consideration that Plan Participants are not U.S. citizens, permanent residents or otherwise U.S. tax residents at any time they are participating, Plan Participants will not be directly subject to U.S. federal income tax on any dividends paid on stock of a U.S. corporation. However, the Cayman Islands trust that holds the Plan’s assets will be subject to U.S. federal income tax on such dividends at a rate of 30%, withheld at source. The trust will not be entitled to any lower tax treaty rates even if a Plan Participant would have been eligible for such lower treaty rates if he or she held the stock directly. Depending on a Plan Participant’s country of residence, he or she may be entitled to a credit against his or her local income tax (if applicable) for the U.S. federal income tax on dividends received by the trust.
Accounting principles generally accepted in the United States of America require plan management to evaluate uncertain tax positions taken by the Plan. The financial statement effects of a tax position are recognized when the position is more-likely-than-not, based on the technical merits, to be sustained upon examination by the relevant tax authority. The plan administrator has analyzed the tax positions taken by the Plan and has concluded that, as of December 31, 2012, there are no uncertain positions taken or expected to be taken that would require recognition of a liability (or asset) or disclosure in the financial statements. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress. The Company believes it is no longer subject to income tax examinations for years prior to 2009.
8. RELATED PARTY TRANSACTIONS
Class A ordinary shares of the Company held by the Plan in the Ensco Class A Fund as an investment qualify as party-in-interest transactions. As of December 31, 2012 and 2011, the Plan’s investment in the Ensco Class A Fund (previously Ensco ADS fund prior to the termination of the Company's ADS facility and conversion to Class A ordinary shares during 2012) was based on the closing price on such dates of $59.28 per share and $46.92 per share, respectively. Like any investment in publicly traded securities, the Company’s Class A shares are subject to price changes. The high and low prices for the Company’s Class A Fund shares were $61.48 and $41.63 for 2012 and the high and low prices for the Company’s ADSs were $60.31 and $37.39 for 2011. The Company’s Class A shares and ADSs totaled approximately 12% and 16% of the Plan’s net assets as of December 31, 2012 and 2011, respectively.
9. RISKS AND UNCERTAINTIES
The Plan invests in various investment options that are exposed to various risks such as interest rate, market and credit risks. Due to the level of risk associated with certain investments, it is at least reasonably possible that changes in the value of the investments will occur in the near term and that such changes could materially affect Plan Participants’ account balances and the amounts reported in the statement of net assets available for benefits.

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Supplemental Information
Schedule I
ENSCO MULTINATIONAL SAVINGS PLAN
SCHEDULE I - INVESTMENTS
AS OF DECEMBER 31, 2012

	
											
Description	 	Number of
shares/units	 	Market
Value	 	Percentage of
Net Assets	
Invesco AIM US Dollar Liquidity Portfolio	 	4,588,684		 	$	4,588,684		 	20.3	%	
MFS Meridian Global Equity Fund	 	51,965		 	1,804,735		 	8.0	%	
Templeton Global Bond Fund	 	49,222		 	1,389,532		 	6.2	%	
Skandia Total Return USD Bond Fund	 	67,712		 	1,246,845		 	5.5	%	
Pioneer Funds-North American Basic Value	 	18,258		 	1,148,079		 	5.1	%	
MFS Meridian Global Total Return Fund	 	40,744		 	995,382		 	4.4	%	
Legg Mason Global Funds-Royce Smaller Companies	 	6,050		 	665,943		 	3.0	%	
Templeton Emerging Markets Fund	 	8,483		 	314,459		 	1.4	%	
Morgan Stanley Global Property Fund	 	11,303		 	274,553		 	1.2	%	
Franklin U.S. Opportunities Fund	 	32,348		 	249,082		 	1.1	%	
Employer securities:	 	 	 	 	 	 	
*Ensco Class A Fund	 	45,371		 	2,689,593		 	11.9	%	
Total Investments	 	 	 	$	15,366,887		 	 	
 
* Party-in-interest

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SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the Administrator of the Plan has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

	

 	  	 	  	Ensco Multinational Savings Plan	
 	 	 	
Date: March 28, 2013	  	 	  	/s/ ROBERT W. EDWARDS, III	
 	  	 	  	By: Robert W. Edwards, III	
 	  	 	  	Controller of Ensco plc	

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EXHIBIT INDEX

	

Exhibit No.	  	Description	
 	 	
23.1		  	Consent of Independent Registered Public Accounting Firm	

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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-156530 on Form S-8 of Ensco Multinational Savings Plan dated December 31, 2008, as amended by post-effective amendment No. 1 dated December 23, 2009, of our report dated March 28, 2013, with respect to the statements of net assets available for benefits of the Ensco Multinational Savings Plan as of December 31, 2012 and 2011, the related statements of changes in net assets available for benefits for the years then ended, and the related supplemental schedule of schedule I as of December 31, 2012, which report appears in the December 31, 2012 annual report on Form 11-K of the Ensco Multinational Savings Plan.

/s/ Whitley Penn LLP

Dallas, Texas
March 28, 2013