A very large, often one-time stock grant made usually only to a CEO and perhaps other senior executives. These grants often involve performance-based equity and thus require the meeting and exceeding of specified goals for the grant to vest and pay out or for the options to be exercisable. For details on these types of grants, see an article from the firm Equity Methods: Executive Mega Grants: Navigating Pitfalls In Design, Valuation, And Accounting.