<SEC-DOCUMENT>0000950103-11-001734.txt : 20110506
<SEC-HEADER>0000950103-11-001734.hdr.sgml : 20110506
<ACCEPTANCE-DATETIME>20110506164013
ACCESSION NUMBER:		0000950103-11-001734
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20110506
DATE AS OF CHANGE:		20110506

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			YPF SOCIEDAD ANONIMA
		CENTRAL INDEX KEY:			0000904851
		STANDARD INDUSTRIAL CLASSIFICATION:	PETROLEUM REFINING [2911]
		IRS NUMBER:				521612271
		STATE OF INCORPORATION:			C1
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-50107
		FILM NUMBER:		11820223

	BUSINESS ADDRESS:	
		STREET 1:		AVENIDA PTE R SAENZ 777-8 PISO
		CITY:			BUENOS AIRES 1364 AR
		STATE:			C1
		BUSINESS PHONE:		5413267265

	MAIL ADDRESS:	
		STREET 1:		AVENIDA PTE R SAENZ 777-8 PISO
		CITY:			BUENOS AIRES
		STATE:			C1

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			REPSOL YPF SA
		CENTRAL INDEX KEY:			0000847838
		STANDARD INDUSTRIAL CLASSIFICATION:	PETROLEUM REFINING [2911]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		PASEO DE LA CASTELLANA 278-280
		CITY:			MADRID SPAIN
		STATE:			U3
		ZIP:			28046
		BUSINESS PHONE:		2124504950

	MAIL ADDRESS:	
		STREET 1:		PASEO DE LA CASTELLANA
		STREET 2:		278-280
		CITY:			MADRID
		STATE:			U3
		ZIP:			U328046

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	REPSOL SA
		DATE OF NAME CHANGE:	20000710
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>dp22442_sc13da.htm
<DESCRIPTION>FORM SC 13D/A
<TEXT>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 16pt; FONT-FAMILY: times new roman">UNITED STATES</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 16pt; FONT-FAMILY: times new roman">SECURITIES AND EXCHANGE COMMISSION</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Washington, D.C.&#160;&#160;20549</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 16pt; FONT-FAMILY: times new roman">SCHEDULE 13D/A</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Under the Securities Exchange Act of 1934</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Amendment No. 5 to Amended and Restated Schedule 13D)*</font></div>
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<td colspan="5" valign="top" width="80%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td colspan="5" valign="bottom" width="80%" style="BORDER-BOTTOM: black 2px solid">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman">YPF SOCIEDAD AN&#211;NIMA</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Name of Issuer)</font></div>
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<td colspan="5" valign="bottom" width="80%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td colspan="5" valign="bottom" width="80%" style="BORDER-BOTTOM: black 2px solid">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CLASS D SHARES</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(PAR VALUE PS. 10 PER SHARE)</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Title of Class of Securities)</font></div>
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<td colspan="5" valign="bottom" width="80%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td colspan="5" valign="bottom" width="80%" style="BORDER-BOTTOM: black 2px solid">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">984245100</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(CUSIP Number)</font></div>
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<td colspan="5" valign="bottom" width="80%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td colspan="5" valign="bottom" width="80%" style="BORDER-BOTTOM: black 2px solid">
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Miguel &#193;ngel Devesa del Barrio</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Repsol YPF, S.A.</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Paseo de la Castellana, 278&#8212;280</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">28046 Madrid, Spain</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Tel: (011-34) 91 314-2821</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">With a copy to<font style="DISPLAY: inline; FONT-WEIGHT: bold">:</font></font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Nicholas A. Kronfeld, Esq.</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Davis Polk &amp; Wardwell LLP</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">450 Lexington Avenue</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">New York, NY 10017</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Tel: (212) 450-4000</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Name, Address and Telephone Number of Person Authorized to</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Receive Notices and Communications)</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">May 4, 2011</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Date of Event which Requires Filing of this Statement)</font></div>
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<td colspan="5" valign="top" width="80%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td colspan="5" valign="top" width="80%">
<div style="DISPLAY: block; MARGIN-LEFT: 27pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 23.75pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of &#167;&#167;240.13d-1(e), 240.13d-l(f) or 240.13d-l(g), check the following box.</font></div>
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<td colspan="5" valign="top" width="80%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td colspan="5" valign="top" width="80%">
<div style="DISPLAY: block; MARGIN-LEFT: 27pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 23.75pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">*The remainder of this cover page shall be filled out for a reporting person&#8217;s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.</font></div>
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<td colspan="5" valign="top" width="80%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td colspan="5" valign="top" width="80%">
<div style="DISPLAY: block; MARGIN-LEFT: 27pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 24pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">The information required on the remainder of this cover page shall not be deemed to be &#8220;filed&#8221; for the purpose of Section 18 of the Securities Exchange Act of 1934 (&#8220;Exchange Act&#8221;) or otherwise subject to the liabilities of that section of the Exchange Act but shall be subject to all other provisions of the Exchange Act (however, see the Notes).</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 24pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Continued on following pages)</font></div>
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<td align="left" width="33%" style="BORDER-RIGHT: black 2px solid; BORDER-TOP: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;CUSIP No. 984245100</font></font></td>
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<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;<font style="DISPLAY: inline; FONT-WEIGHT: bold"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: times new roman">13D</font></font></font></div>
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<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-WEIGHT: bold">Page&#160;2 of&#160;10 Pages</font></font></div>
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<table bgcolor="white" cellpadding="5" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
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<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">1</font></div>
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<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">NAME OF REPORTING PERSONS</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">REPSOL YPF, S.A.</font></div>
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<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 0.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">2</font></div>
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<div style="LINE-HEIGHT: 0.5"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP&#160; (see instructions)</font></div>
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<div style="LINE-HEIGHT: 0.5">&#160;</div>
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<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; LINE-HEIGHT: 0.5"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(a) </font></div>
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<div><font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></div>
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<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; LINE-HEIGHT: 0.5; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
<td valign="middle" width="90%" style="LINE-HEIGHT: 0.5; BORDER-BOTTOM: black 2px solid">

<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(b) </font></div>
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<div><font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></div>
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<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">3</font></div>
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<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">SEC USE ONLY</font></div>

<div>&#160;</div>

<div>&#160;</div>
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<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4</font></div>
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<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">SOURCE OF FUNDS&#160; (see instructions) </font>
<div style="DISPLAY: block; TEXT-INDENT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">NOT APPLICABLE</font></font></div>
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<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">5</font></div>
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<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e) </font></div>

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<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="right">&#160;</div>
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<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div>
<div><font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></div>
</div>
</td>
</tr><tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">6</font></div>
</td>
<td width="90%" style="BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CITIZENSHIP OR PLACE OF ORGANIZATION</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font>
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">KINGDOM OF SPAIN</font></font></div>
</div>
</td>
<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
</tr></table>
</div>

<div align="center">
<table bgcolor="white" cellpadding="5" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr bgcolor="white">
<td align="left" nowrap rowspan="4" width="20%" style="BORDER-TOP: medium none; PADDING-BOTTOM: 2px; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">NUMBER OF SHARES</font></div>

<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">BENEFICIALLY OWNED BY</font></div>

<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">EACH REPORTING PERSON</font></div>

<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">WITH</font></div>
</td>
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-TOP: medium none; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">7</font></div>
</td>
<td width="75%" style="BORDER-RIGHT: black 2px solid; BORDER-TOP: medium none; BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">SOLE VOTING POWER</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font>
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">268,358,619 CLASS D SHARES</font></font></div>
</div>
</td>
</tr><tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">8</font></div>
</td>
<td width="75%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">SHARED VOTING POWER</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font>
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">NOT APPLICABLE</font></font></div>
</div>
</td>
</tr><tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">9&#160;</font></div>
</td>
<td width="75%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">SOLE DISPOSITIVE POWER</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font>
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">268,358,619 CLASS D SHARES</font></font></div>
</div>
</td>
</tr><tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">10</font></div>
</td>
<td width="75%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">SHARED DISPOSITIVE POWER</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font>
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">NOT APPLICABLE</font></font></div>
</div>
</td>
</tr></table>
</div>

<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">
<table bgcolor="white" cellpadding="5" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-TOP: medium none; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">11</font></div>
</td>
<td width="90%" style="BORDER-TOP: medium none; BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font>
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">268,358,619 CLASS D SHARES</font></font></div>
</div>
</td>
<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
</tr><tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">12</font></div>
</td>
<td width="90%" style="BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES&#160; (see instructions)</font></div>

<div>&#160;</div>

<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160; </font></div>
</td>
<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></div>
</td>
</tr><tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">13</font></div>
</td>
<td width="90%" style="BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font>
<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">68.23% OF CLASS D SHARES</font></font></div>
</div>
</td>
<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
</tr><tr bgcolor="white">
<td valign="top" width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-LEFT: black 2px solid; BORDER-BOTTOM: black 2px solid">
<div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">14</font></div>
</td>
<td width="90%" style="BORDER-BOTTOM: black 2px solid">
<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">TYPE OF REPORTING PERSON&#160; (see instructions)</font></div>

<div>&#160;</div>

<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">CO</font></div>
</td>
<td width="5%" style="BORDER-RIGHT: black 2px solid; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
</tr></table>
</div>

<div>&#160;</div>
</div>
</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>

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<div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160; </font></div>

<div style="WIDTH: 100%; TEXT-ALIGN: center">
<hr style="COLOR: black" noshade size="2">
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<div id="HDR">
<div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">&#160; </font></div>
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<div style="DISPLAY: block; TEXT-INDENT: 0pt"><br>
</div>

<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman">Item 1.&#160;&#160;Security and Issuer</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Repsol YPF, S.A. (&#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Repsol</font>&#8221;) hereby amends and supplements its report on Schedule 13D, as last amended on March 28, 2011 (as heretofore amended and restated, the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Schedule 13D</font>&#8221;), with respect to the Class D Shares, nominal value PS. 10 per share (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Class D Shares</font>&#8221;), of YPF Sociedad An&#243;nima, an Argentine corporation (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Issuer</font>&#8221; or the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Company</font>&#8221;).&#160;&#160;The principal executive offices of the Issuer are located at Macacha G&#252;emes 515, C1106BKK Ciudad Aut&#243;noma de Buenos Aires, Argentina.&#160;&#160;Unless otherwise indicated, capitalized terms used in this Amendment No. 5 (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Amendment</font>&#8221;), but not defined herein, shall have the meaning assigned to such terms in the Schedule 13D.</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman">Item 2.&#160;&#160;Identity and Background</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item 2 of the Schedule 13D is hereby amended and supplemented by the following information:</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On February 21, 2008, as previously reported on Repsol&#8217;s Amended and Restated Schedule 13D/A dated February 22, 2008 (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">2008 Schedule 13D/A</font>&#8221;), Repsol entered into a transaction (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Transaction</font>&#8221;) pursuant to which it granted to Mr. Enrique Eskenazi, Mr. Sebasti&#225;n Eskenazi, Mr. Mat&#237;as Eskenazi Storey and Mr. Ezequiel Eskenazi Storey (collectively, the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Eskenazi Family</font>&#8221;) options to purchase from Repsol, within four years after the consummation of the Transaction, Class D shares or ADSs of the Issuer representing up to an additional 10.0% in the aggregate of the outstanding capital stock of the Issuer pursuant to an option agreement (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Second Option Agreement</font>&#8221; and such option, the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Second Option</font>&#8221;), at a price per share to be determined in accordance with the formula contained in the Second Option Agreement and described in the 2008 Schedule 13D/A. Pursuant to the Second Option Agreement, Repsol also agreed to provide the financing of up to 48% of the exercise price required to be paid for the shares purchased by certain members of the Eskenazi family pursuant to an exercise of the Second Option.</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The foregoing description of the Second Option Agreement does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Second Option Agreement, which was filed as Exhibit 7.05 to the 2008 Schedule 13D/A and is incorporated by reference herein.</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On April 29, 2011, the Eskenazi Family assigned to Petersen Energ&#237;a Inversora Holdings, S.A. (&#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">PEISA</font>&#8221;) the Eskenazi Family&#8217;s rights and obligations under the Second Option Agreement pursuant to an assignment agreement (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Second Option Assignment Agreement</font>&#8221;).</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt"><br>
</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On May 3, 2011, PEISA delivered written notice of its exercise of the Second Option and on May 4, 2011, Repsol acknowledged and accepted such exercise (such notice and acceptance, the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Second Option Exercise Notice</font>&#8221;). The exercise of the Second Option is expected to result in the purchase by PEISA and the sale by Repsol of restricted American Depositary Shares representing 39,331,279 Class D shares of the Issuer (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Second Option Shares</font>&#8221;), at a price of USD $33.1551 per Class D Share (determined in accordance with the formula contained in the Second option Agreement), or USD $1,304,032,488 in the aggregate. Pursuant to its financing undertaking in the Second Option Agreement, Repsol and/or its affiliates plan to enter into a credit agreement with PEISA to provide a loan of approximately USD $625,935,594 in order to partially finance the aggregate exercise price to be paid by PEISA to Repsol. The consummation of the exercise of the Second Option (the &#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Second Option Closing</font>&#8221;) is expected to occur on or about May 12, 2011, subject to certain customary closing conditions and the execution of certain definitive documentation. Subject to and until the Second Option Closing, Repsol will retain all voting and economic rights with respect to the Second Option Shares.</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt"><br>
</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The name, business address, present principal occupation or employment and citizenship of each director and executive officer of Repsol is set forth on <font style="DISPLAY: inline; TEXT-DECORATION: underline">Schedule A</font> attached hereto.</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">During the last five years, none of Repsol and, to the best of Repsol&#8217;s knowledge, the persons listed on <font style="DISPLAY: inline; TEXT-DECORATION: underline">Schedule A</font> attached hereto, has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors) or has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future </font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">violations of, or prohibiting or mandating activities subject, to federal or state securities laws or finding any violation with respect to such laws.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman">Item 3.&#160;&#160;Source and Amount of Funds or Other Consideration</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">This Amendment relates to the transactions in the Class D Shares entered into by Repsol as described in Item 2 above and Item 4 below.&#160;&#160;Repsol is not purchasing any shares of the Issuer.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman">Item 4.&#160;&#160;Purpose of Transaction</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item 4 of the Schedule 13D is hereby amended and supplemented by the second, third, fourth and fifth paragraphs under Item 2 above.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Except as set forth herein and set forth below, Repsol does not have any plans or proposals that relate to or would result in any of the transactions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Repsol intends, subject to market and other conditions, to make a material public offering of Class D shares in an amount to be determined of the Issuer&#8217;s outstanding capital stock to investors located in the Republic of Argentina during the second half of 2011, although there can be no assurance that such offering and sale will take place.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item 5(a) of the Schedule 13D is hereby amended and supplemented by the following information:</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Repsol beneficially owns, for the purpose of Rule 13d-3 promulgated under the Exchange Act, 268,358,619 Class D Shares, representing approximately 68.23% of the Issuer&#8217;s outstanding Class D Shares. Subject to and following the Second Option Closing, Repsol will beneficially own 229,027,340 Class D Shares, representing approximately 58.23% of the Issuer&#8217;s outstanding Class D Shares.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Except as set forth herein, none of Repsol, and, to the best of its knowledge, any persons named in <font style="DISPLAY: inline; TEXT-DECORATION: underline">Schedule A</font> hereto owns beneficially any shares of the Issuer.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item 5(c) of the Schedule 13D is hereby amended and supplemented by the following information:</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Other than the transactions described in Item 4 of this Amendment and other than the transactions set forth in Repsol&#8217;s Amendment No. 4 to the Schedule 13D as filed with the SEC on March 28, 2011, there have been no transactions in the Class D Shares of the Issuer effected by Repsol or, to the knowledge of Repsol, any person named in <font style="DISPLAY: inline; TEXT-DECORATION: underline">Schedule A,</font> during the past sixty days.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman">Item 6. <a name="a__"><!--EFPlaceholder--></a>Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Except for the contracts, arrangements, understandings or relationships (legal or otherwise) described in this Schedule 13D and the matters contemplated above in Item 4 and described below in this Item 6, to the best knowledge of Repsol, there are no contracts, arrangements, understandings or relationships (legal or otherwise), including, but not limited to, transfer or voting of any of the securities, finder&#8217;s fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or loss, or the giving or withholding of proxies, between Repsol and/or the persons enumerated in <font style="DISPLAY: inline; TEXT-DECORATION: underline">Schedule A</font>, and any other person, with respect to any securities of the Issuer, including any securities pledged or otherwise subject to a contingency the occurrence of which would give another person voting power or investment power over such securities other than standard default and similar provisions contained in loan agreements.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Under the terms of the Second Option Exercise Agreement, on May 3, 2011, PEISA provided the Second Option Exercise Notice to Repsol, informing Repsol of its exercise of the Second Option and Repsol accepted such notice on May 4, 2011. The Second Option Exercise also included a request by PEISA for Repsol to finance USD </font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The name, business address, title, present principal occupation or employment of each of the directors and executive officers of Repsol YPF, S.A. (&#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Repsol</font>&#8221;), are set forth below.&#160;&#160;Unless otherwise indicated, the business address of each such person is Paseo de la Castellana, 278&#8212;280, 28046 Madrid, Spain.&#160;&#160;Unless otherwise indicated, each occupation set forth opposite an individual&#8217;s name refers to Repsol.&#160;&#160;Unless otherwise indicated below, all of the persons listed below are citizens of Spain.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">2nd Vice-Chairman and Director, nominated for membership by Criteria Caixa Corp. (Caja de Ahorros y Pensiones de Barcelona &#8220;la Caixa&#8221; Group), and Member of the Delegate Committee (Comisi&#243;n Delegada) of Repsol YPF, S.A.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Chairman of &#8220;la Caixa&#8221;, Criteria CaixaCorp, S.A., CECA (Confederaci&#243;n Espa&#241;ola de Cajas de Ahorros) and Foundation &#8220;la Caixa&#8221;; Vice Chairman of Abertis Infraestructuras, Sociedad General de Aguas de Barcelona and Telef&#243;nica; Director of Banco BPI and Grupo Financiero Inbursa; and Director of The Bank East of Asia, Limited.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Juan Abell&#243; Gallo<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, nominated for membership by Sacyr Vallehermoso, S.A., Member of the Strategy, Investment and Corporate Social Responsibility Committee of Repsol YPF, S.A.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Chairman of Torreal and Alcaliber (representing Nueva Compa&#241;&#237;a de Inversiones); Vice-Chairman of Sacyr Vallehermoso (representing Nueva Compa&#241;&#237;a de Inversiones) and CVNE (representing Austral, B.V.); and Director of Zed Worldwide (representing Nueva Compa&#241;&#237;a de Inversiones).</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Paulina Beato Blanco<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors, and member of the Audit and Control Committee of Repsol YPF, S.A.</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Advisor to the Iberoamerican Secretary General (Secretar&#237;a General Iberoamericana), professor for Economic Analysis in various universities and member of a special board for promoting the Knowledge Society in Andalusia.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Artur Carulla Font<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors, Member of the Delegate Committee (Comisi&#243;n Delegada) and Chairman of the Nomination and Compensation Committee of Repsol YPF, S.A. He has been appointed Lead Independent Director of the Board of Directors of Repsol YPF in accordance with the provisions of the ByLaws and of the Regulations of the Board of Directors.</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Chairman of Agrolimen and its affiliated companies Affinity Petcare, Preparados Alimenticios (Gallina Blanca Star), Biocentury, The Eat Out Group and Reserva Mont-Ferrat; Director and Secretary of Arbora &amp; Ausonia, Quercus Capital Riesgo, S.G.E.C.R and Consorcio de Jabugo; Member of the Regional Board of Telef&#243;nica in Catalonia; Member of the Advisory Boards of EXEA Empresarial and Roca Junyent; Vice-Chairman of C&#237;rculo de Econom&#237;a and Foundation ESADE; Member of IAB (International Advisory Board) of the Generalitat de Catalunya, Foundation Lluis Carulla, Management Board of Instituto de la Empresa Familiar, Foundation MACBA (Museo de Arte Contemporaneo de Barcelona) and of FUOC (Fundaci&#243;n para la Universitat Abierta de Catalu&#241;a).</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Lu&#237;s Carlos Croissier Batista<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors and Member of the Strategy, Investment and Corporate Social Responsibility Committee of Repsol YPF, S.A.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director of Adolfo Dominguez, Testa Inmuebles en Renta, Eolia Renovables de Inversiones SCR, Grupo Copo de Inversiones and Sole Director of Eurofocus Consultores.</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#193;ngel Dur&#225;ndez Adeva<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors and Chairman of the Audit and Control Committee of Repsol YPF, S.A.</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director of Gestevisi&#243;n Telecinco; Member of the Advisory Board of Exponencial-Agencia de Desarrollos Audiovisuales, Ambers&#160;&amp; Co and FRIDE (Foundation for the international relations and the foreign development); Chairman of Arcadia Capital and Informaci&#243;n y Control de Publicaciones; Member of Foundation Germ&#225;n S&#225;nchez Ruip&#233;rez and Foundation Independiente and Vicepresident of Foundation Euroam&#233;rica.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Javier Echenique Landir&#237;bar<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors, Member of the Delegate Committee (Comisi&#243;n Delegada), and of the Audit and Control Committee of Repsol YPF, S.A.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Vice-Chairman of Banco Sabadell, Director of Telef&#243;nica M&#243;viles M&#233;xico, Actividades de Construcci&#243;n y Servicios (ACS), Grupo Empresarial Ence and Celistics, L.L.C.; Delegate of the Board of Telef&#243;nica in the Basque region; Member of the Advisory Board of Telef&#243;nica Spain; Member of Foundation Novia Salcedo and C&#237;rculo de Empresarios Vascos.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Mario Fern&#225;ndez Pelaz</font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors and member of </font></div>

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<div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">the Nomination and Compensation Committee. Chairman of BBK (Bilbao Bizkaia Kutxa).</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Mar&#237;a Isabel Gabarr&#243; Miquel<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors, Member of the Nomination and Compensation Committee and Member of the Strategy, Investment and Corporate Social Responsibility Committee.</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Registered on the Bar of Notaries of Barcelona; Member of the Sociedad Econ&#243;mica Barcelonesa de Amigos del Pa&#237;s.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Jose Manuel Loureda Manti&#241;&#225;n<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, nominated for membership by Sacyr Vallehermoso, S.A., Member of the Nomination and Compensation Committee and of the Strategy, Investment and Corporate Social Responsibility Committee of Repsol YPF, S.A.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director of Sacyr Vallehermoso (as representative of Prilou), Chairman of Valoriza Gesti&#243;n, S.A. and Hoteles Bisnet and Director of Vallehermoso Divisi&#243;n Promoci&#243;n, S.A.U., Testa Inmuebles en Renta, Sacyr, S.A.U. and Somague S.G.P.S.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Juan Mar&#237;a Nin G&#233;nova<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, nominated for membership by Criteria Caixa Corp (&#8220;la Caixa&#8221; Group) and member of the Nomination and Compensation Committee and Chairman of the Strategy, Investment and Corporate Social Responsibility Committee of Repsol YPF, S.A.</font></div>

<div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>

<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">President and CEO of &#8220;la Caixa&#8221;; Deputy Chairman of Foundation &#8220;la Caixa&#8221; and Criteria CaixaCorp; Member of the Board of Directors of SegurCaixa Holding, Gas Natural SDG, Banco BPI, Erste Group Bank, A.G. and Grupo Financiero Inbursa; Member of the Board of Governors of University of Deusto and Foundation ESADE Business School; Member of the Board of Directors of C&#237;rculo Ecuestre and APD (Asociaci&#243;n para el Progreso de la Direcci&#243;n), Foundation Federico Garc&#237;a Lorca and Foundation Council Spain-U.S.A.; Deputy Chairman of Foundation Council Spain-India; Member of the Economic Group of Spain-China Forum; Secretary of the Federaci&#243; Catalana de Caixes d&#8217;Estalvi; Member of the Economic Policy Commission of the Barcelona Chamber of Commerce.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">PEMEX Internacional Espa&#241;a, S.A.<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Jos&#233; Manuel Carrera Panizzo serves as representative of PEMEX Internacional Espa&#241;a, S.A. (a related company of PEMEX) on the Board of Directors of Repsol YPF, S.A. Spanish law permits limited liability companies to serve as members of the Board of Directors. A company serving in such a capacity must appoint a natural person to represent it at the meetings of the Board of Directors. Director, Member of the Delegate Committee (Comisi&#243;n Delegada) and of the Strategy, Investment and Corporate Social Responsibility Committee of Repsol YPF, S.A.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Administrative and Finance Director of P.M.I. Comercio Internacional, S.A. de C.V. and Managing Director of Pemex internacional Espa&#241;a, S.A. and P.M.I. Holdings Petr&#243;leos Espa&#241;a, S.L.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Citizen of: Mexico</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Henri Philippe Reichstul<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director, Independent outside director as determined in accordance with the Bylaws and the Regulations of the Board of Directors and Member of the Delegate Committee (Comisi&#243;n Delegada) of Repsol YPF, S.A.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Member of the Strategic Board of ABDIB, Director of Ashmore Energy Internacional, Member of Coinfra, Member of the Advisory Board of Lhoist do Brasil Ltda., Member of the Supervisory Board of Peugeot Citroen, Member of the International Advisory Board of Group Credit Agricole and Vice-Chairman of the Board of the Brazilian Foundation for Sustainable Development.</font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Citizen of: Brazil</font></font></div>

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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Luis Su&#225;rez de Lezo Mantilla<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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<div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; MARGIN-RIGHT: 9.35pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Miguel Mart&#237;nez San Mart&#237;n<font id="TAB1" style="MARGIN-LEFT: 12pt"></font></font></div>
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