Who is the CEO of CFO?

Excuse me, could you clarify your question? As far as I'm aware, CFO stands for Chief Financial Officer, which is a position within a company, not an organization or entity that has its own CEO. Are you perhaps asking about the CEO of a specific company that you believe has a CFO named "CFO"? If so, I would need more information about the company to provide an accurate answer. Alternatively, if you're asking about the person who oversees the financial operations of a company's CFO, that would typically be the CEO of the company itself. Could you please clarify your question further?