No... Not at all. Not that many large cap corporations(large capital organizations, not Mom and Pop Inc) have one exclusive owner. None of the publicly traded corporations are monarchies at all.
As a person making this claim, you are failing miserably to make a case that CEO is a monarch. (Mostly because you don't know what it means to be CEO or a monarch)
They all have massive limits on their powers as compared to a CEO. They work with parliaments, etc. They can be vetoed easily.
I'll grant it isn't a perfect analogy. A CEO doesn't have unlimited power granted by god and has to answer to a board and therefore shareholders. But in essence, the idea of having a singular ultimate decision maker/leader rather than having a small group vote on decisions or have the entire company vote makes it a de-facto monarchy.
Your analogy is, again, rooted in lack of knowledge(aka ignorance) of corporate structures.
The CEO of my startup right now, where she literally owns 51%, still must go to the board for any impactful decision. And any C level exec can call the board.
LLCs are generally autocratic, but that isn't "any corporation".