Are all the top cyclists in the Tour de France after the yellow jersey?

Teams in the Tour are there with different goals. Some teams are looking for an overall win, some are looking to win one of the other jerseys, maybe more than one. Some other teams are just looking for a stage win or two. The guys looking to win over all will avoid getting involved in the sprints because of the danger of an accident. Even the guys looking to win the green jersey have to use a bit more caution than the guys going all out for a stage win, if you fall and injure yourself, you could be out of the race and lose all chance of winning the jersey at the end