Generally speaking, it's normal to keep it private.
Unless the CEO happens to be the CEO of what is considered one of the most important company for national security and future, and his private life involves somebody who appears to be a spy for the biggest competitor for world hegemony. Then it's kind of big deal for everybody.
Unless the CEO happens to be the CEO of what is considered one of the most important company for national security and future, and his private life involves somebody who appears to be a spy for the biggest competitor for world hegemony. Then it's kind of big deal for everybody.