If you don't have time two read the whole article, the four characteristics are basically 1. Overall Talent 2. Execution Skills 3. Charisma 4. Strategic Ability
What's more interesting is the point below that some CEO's scored low on interpersonal skills. I guess you can't be good at everything!
One especially interesting finding is that CEO candidates were typically rated low on interpersonal skills, which involves behaviors like being a good listener and treating people with respect. In other words, leaders who have the ability to get things done aren't necessarily the most agreeable individuals. Previous research Kaplan and Sorensen helped conduct suggests that execution skills are strongly correlated with CEO success. Kaplan cited Steve Jobs as an example of someone who was probably high on execution and low on interpersonal skills: He led Apple to greatness, but was notorious for shouting at and criticizing employees.