Notified on the 9 January 2007, with effect on 29 January 2007, this merger consists of the acquisition on 4 May 2006, by OPCA - OBRAS PÚBLICAS E CIMENTO ARMADO SA ("OPCA") and EDIFER - SOCIEDADE GESTORA DE PARTICIPAÇÕES SOCIAIS SA ("EDIFER"), of joint control of the company GESTISÔR SGPS, SA ("GESTISÔR") and its subsidiary PROMORAIL - TECNOLOGIAS DE CAMINHO de FERRO SA ("PROMORAIL"), undertakings under the sole control, at the time, of EDIFER.