Conniving

Other than being knowledgeable and experienced, the head of the company should be well-reputed, mind his behavior, and have a domineering character to have control over the company.

A blot on their personality could significantly affect the company. Or else the person should be known for his terrible temperament, then the actions of the person wouldn't affect the company. 

Casper had maintained his clean image for many decades. Hence the events at his family, his dirty secret, and Anya's attack on the company created a large impact on the company.

Not to mention, some of his decisions did affect the company. For example, using the company lawyers for his family trouble. He was well aware of how the shareholders were eager to condemn him. 

Thus he didn't give a chance to anybody and stepped forward to speak about it before anybody could get the chance to point their finger at him in the hall.