SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16

of the Securities Exchange Act of 1934

For the month of August, 2018

Commission File Number: 001-12102

YPF Sociedad Anónima

(Exact name of registrant as specified in its charter)

Macacha Güemes 515

C1106BKK Buenos Aires, Argentina

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F  ☒            Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes  ☐            No  ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes  ☐            No  ☒

YPF Sociedad Anónima

TABLE OF CONTENTS

ITEM

Autonomous City of Buenos Aires, August 7, 2018

To the

Bolsa de Comercio de Buenos Aires

(Buenos Aires Stock Exchange)

Sarmiento 299

Ref: Financial Statements as of 06/30/2018

Dear Sirs:

In order to fulfill the requirements of Articles Nos. 62 and N°63 of the ByMA Listing Regulations, we advise you that the Company’s Board of Directors approved, at its meeting held on August 7, 2018, the condensed interim financial statements for the six-month period ended June 30, 2018. Relevant information of such condensed consolidated interim financial statements of YPF S.A. follows:

1) Statement of income (1) (in millions of pesos)

2) Other comprehensive income (1) (in millions of pesos)

3) Comprehensive income (1) (in millions of pesos)

4) Detail of Shareholders’ equity as of 06/30/2018 (1) (in millions of pesos)

Art. N° 62. Subsection L.6. Shares owned by the parent group:

As of June 30, 2018, the number of shares belonging to the controlling shareholder of the Company amounted to 200,593,289 shares, which include 200,589,525 class D shares and 3,764 class A shares.

Art. N °62. Subsection L.7. Shares with rights to securities representing debt convertible into shares and/or purchase options over company shares, corresponding to ownership of the shareholder or parent group:

None.

Art. N °62. Subsection L.8. Parent shareholder of the company:

Federal Government—Ministry of Energy, with legal domicile at Hipólito Yrigoyen 250, Autonomous City of Buenos Aires.

Yours faithfully,

Diego Celaá

Market Relations Officer

YPF S.A

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.