YPF SA : SEC HR Acquisition of own shares

TRANSLATION

Autonomous City of Buenos Aires, September 02, 2013
To the

Bolsa de Comercio de Buenos Aires

(Buenos Aires Stock Exchange)

Ref: YPF gives notice of an acquisition of its own shares in the market. Relevant Fact. Compliance with Article 23 of Chapter VII of the Buenos Aires Stock Exchange Rules

Dear Sirs:
The purpose of this letter is to comply with the requirements of Article 23 of Chapter VII of the
Buenos Aires Stock Exchange Rules.
In that connection, please be advised that on August 30, YPF S.A. acquired 1,565 of its ordinary Class D shares in book entry form, Ps.10 (ten pesos) par value per share and each with a right to 1 (one) vote, in the Buenos Aires Stock Exchange ("BASE"), at an average price of Ps.

149.90 per share, for a total amount of Ps. 234,587.75

Thus, during the week of August 26 to August 30, the Company has acquired a total of 14,657 of its ordinary Class D shares in book entry form, Ps.10 (ten pesos) par value per share and each with a right to 1 (one) vote, in the BASE, at an average price of Ps. 148.60 per share, for a total amount of Ps. 2,178,046.80.
During such week, the Company acquired 100,000 of its American Depositary Shares ("ADS") on the New York Stock Exchange ("NYSE"), at an average price of $16.97 per ADS, for a total amount of $1,696,777.99.
Yours faithfully,

Gabriel E. Abalos Market Relations Officer YPF S.A.