The purpose of this letter is to comply with the requirements of Article 23 of Chapter VII of the Buenos Aires Stock Exchange Regulations.

In that connection, please be informed that YPF S.A. ("YPF" or the "Company") is in the process of achieving a merger by absorption with its following subsidiaries: YSUR PARTICIPACIONES S.A.U., YSUR INVERSIONES PETROLERAS S.A.U., YSUR INVERSORA S.A.U., YSUR PETROLERA ARGENTINA S.A., YSUR RECURSOS NATURALES S.R.L., YSUR ENERGIA ARGENTINA S.R.L., PETROLERA LF COMPANY S.R.L. y PETROLERA TDF COMPANY S.R.L. (the "Absorbed Companies"), which are companies controlled by YPF as a result of the asset acquisition of the Apache group in Argentina in accordance with the information provided to the market through Relevant Information dated February 12, 2014, February 13, 2014 and March 12, 2014. The effective date of the merger will be January 1, 2017, after which the Absorbed Companies' operations must be considered performed by YPF.

With respect to the merger, YPF will be the absorbing company and will continue the activities and operations of each of the Absorbed Companies, which will be dissolved without liquidation.

The aforementioned merger will centralize the management of the companies under a single corporate organization, thereby obtaining operational and economic benefits related to the achievement of higher operating efficiency and effectiveness, the enhanced use of available resources and of technical, administrative and financial structures, and the rationalization and reduction of related costs.

Once the process of negotiation and the preparation of documentation has been completed, the corresponding prior merger agreement will be signed, which will be submitted for the approval of the respective directors and shareholders' meetings of each of the companies involved in the merger. The merger will be subject to obtaining the applicable regulatory approvals.