The study found that 61 of the Fortune 100 companies have combined the roles of Chairman and CEO, while 39 have split the roles. However, the trend is toward splitting the roles, as 25 companies that previously combined the roles have now split them. Companies that consistently combine the roles tend to have fewer CEO transitions and are more likely to promote insiders to the CEO position. While there is no consensus on the best leadership structure, designating an independent Lead Director when the Chairman is not independent has become a common corporate governance practice.