While most companies have elements that are hard to see clearly [1], I would hope 95% of what the company is doing would be transparent to the CEO.
The CEO should easily be able to tell which divisions/projects are profitable, which are on track to hit their goals, how those goals combine into a coherent strategy, which areas are getting the most complaints and refunds, and so on.
[1] intangible concepts like 'innovation' and 'culture' for example