This paper, highlights the specificities of influencing strategies used by Moroccan companies listed in Casablanca Stock Exchange. It attempts to evaluate their impact in terms of stockholders’ value creation. In fact, this document shed the light on the findings of a study of 232 influencing actions used by 31 listed companies. After a thorough analysis leading to identify 5 different categories of lobbying behaviors, we proceed with an event study to determine the most efficient lobbying strategies.