This are the twenty bigest portuguese companies:

Altri - paper production.

BCP - The bigest private bank in Portugal.

BES - Another private portuguese bank. See the Bank Marketing of BES with Cristiano Ronaldo

BPI - A private bank which had to been bought by BCP.

BRISA - Highway construction.

CIMPOR - Cement production.

EDP - Energy production.

EDP Renovaveis - Renewable energy production.

GALP - Gas Distribution and Selling.

Jeronimo Martins - Supermarket industry.

Mota-Engil - Construction Industry

PT - Telephone Company

Portucel - Paper production

REN - Energy Distribution.

SEMAPA - Another paper production company.

SONAE Industria - Supermarket, Sports and Technology Selling.

SONAE SGPS - Stocks Aquisition by Sonae Group

SONAECOM - Cellphone, Telephone, Internet Company

Texeira Duarte - Construction Industry

ZON Multimedia - Cable TV Distribuction