Valaris Ltd — Director's Dealing 2013

May 21, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Ensco plc (ESV)
CIK: 0000314808
Period of Report: 2013-05-17

Reporting Person: SWENT JAMES W III (Executive Vice President & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-17	Class A Ordinary Shares	M	11844	$41.29	Acquired	139517	Direct
2013-05-17	Class A Ordinary Shares	M	12268	$34.45	Acquired	151785	Direct
2013-05-17	Class A Ordinary Shares	M	7020	$55.34	Acquired	158805	Direct
2013-05-17	Class A Ordinary Shares	S	31132	$62.04	Disposed	127673	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-17	Employee Stock Option (Right to Buy)	$41.29	M	11844	Disposed	2016-06-01	Class A Ordinary Shares (11844.0)	Direct
2013-05-17	Employee Stock Option (Right to Buy)	$34.45	M	12268	Disposed	2017-06-01	Class A Ordinary Shares (12268.0)	Direct
2013-05-17	Employee Stock Option (Right to Buy)	$55.34	M	7020	Disposed	2018-03-01	Class A Ordinary Shares (7020.0)	Direct

Footnotes

F1: The transaction was executed in multiple trades at prices ranging from $62.00 to $62.13. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2: The options became exercisable in 3 equal annual installments beginning on June 1, 2010.

F3: The options became exercisable in 3 equal annual installments beginning on June 1, 2011.

F4: The options became exercisable in 3 equal annual installments beginning on March 2, 2012.