SEC FORM 3

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Petersen Energia, S.A.

(Last)

(First)

(Middle)

C/O GRUPO PETERSEN

CERRITO 740, PISO 1

(Street)

BUENOS AIRES

C1010AAP

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/21/2008

3. Issuer Name and Ticker or Trading Symbol
YPF SOCIEDAD ANONIMA [ YPF ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
American Depositary Shares (representing Class D Shares)	58,603,606	D
American Depositary Shares (representing Class D Shares)⁽¹⁾	58,603,606	I	Indirectly owned by shareholders of Petersen Energia S.A.⁽²⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Options for the purchase of ADSs or Class D Shares	02/21/2008	02/21/2012	American Depositary Shares (representing Class D Shares) or	39,724,592	⁽³⁾	I	Jointly directly owned⁽⁴⁾

Explanation of Responses:

1. Enrique Eskenazi, Sebastian Eskenazi, Matias Eskenazi Storey, and Ezequiel Eskenazi Storey are the sole shareholders in Petersen Energia PTY Ltd, which is the sole shareholder of Petersen Energia S.A. Each of them may be deemed to beneficially own the ADSs directly owned by Petersen Energia S.A.

2. Indirectly owned by Enrique Eskenazi, Sebastian Eskenazi, Matias Eskenazi Storey and Ezequiel Eskenazi Storey as the shareholders of Petersen Energia PTY Ltd, the sole shareholder of Petersen Energia S.A.

3. The exercise price to purchase Class D Shares or ADSs pursuant to the option is determined in accordance with the following formula: (i) US $15 billion multiplied by the consumer price index published monthly by the United States Bureau of Labor Statistics, (ii) plus or minus the accumulated results of the Issuer from the date of the Options to the exercise date, which is determined based on financial statements for each fiscal year ended after the date of the Options (with certain adjustments made for taxes paid), (iii) minus dividends, (iv) plus or minus any changes in capital, which is defined as contributions in cash or in kind by partners or third parties to increase the Issuer's capital or disbursements made by the Issuer to shareholders to decrease the Issuer's capital, (v) divided by the number of shares of the Issuer outstanding.

4. Jointly directly owned by Enrique Eskenazi, Sebastian Eskenazi, Matias Eskenazi Storey and Ezequiel Eskenazi Storey

Remarks:

(5) Mauro Renato Jose Dacomo is signing on behalf of all of the reporting persons pursuant to the Joint Filing Agreement dated February 28, 2008, which was filed with the Securities and Exchange Commission as an exhibit to the Schedule 13D for YPF filed by the reporting persons on February 29, 2008.

	Mauro Renato Jose Dacomo (5)	02/29/2008
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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