The companies are aware of the impact that disseminating their Corporate Social Responsability (CSR) performance has on how shareholders or investors perceive them. This work analyses if dissiminating CSR results affects their economic-financial results, their scores in open-access sustainability ranking, their brand values, and also the credit ratings that agencies S&P and Moody´s confer them. For this purpose, the only 13 companies of the IT sector occupying a top 100 brand rankings position were selected. The results reveal that large companies come over as being more transparent in terms sustainability, but this transparency is not related to their financial behaviour. Brand rankings collect socio-economic and environmental information, but only the transparency in social and environmental aspects explains the public-access CRS rankings. Finally, the results also show that this transparency affects credit ratings.