HRT Participações em Petróleo S.A. announces to its shareholders and the market, that in the Board of Directors' meeting held on May 10, 2013, the members were informed about Mr. Marcio Rocha Mello's resignation to the position as Chief Executive Officer of HRT, according to the Resignation Letter addressed to the Chairman of the Board of Directors. Mr. Marcio Mello will remain as a member of the Board of Directors of the Company.