In most cases, when a company undertakes a corporate action, it will issue official documentation with detailed explanations. For several different types of corporate actions, such as mergers and even cash dividends, the company will need approval from the general meeting. More information regarding the decision can be found in the meeting minutes which are often published and publicly available. These types of official documents can be found on the official company website, or on the website of the stock exchange where the company is listed.