Not exactly. A company executive can buy or sell shares in the open market at any time as long as they aren't made based on knowledge of non-public information. To avoid that issue an executive can set up what is known as a 10B5-1 plan. The plan must be created at a time when no material non-public information is known by the executive and the executive creates a schedule indicating future dates on which specific numbers of shares are to be bought or sold.