If by "state" you mean the collections of peoples who have administrative authority over how society operates then corporations are part of this.
We use government officials to lobby overseas on corporation's behalf, issue new currency to make sure they stay afloat, entrust them with water, power, roads, waste management and schools. They make our war supplies, run the mercenaries for the wars, manage the state's finances through private banks and run elections. Some even have charters to manage entire cities (such as the Irvine Group).
We use state apparatuses to defend them overseas. They run the media and manage such mundane state functions as traffic citations and parking fees. Corporations are part of the state apparatus.
You could say corporations aren't part of the state apparatus because you've personally decided not to classify them as such ... but that's just playing some theatrical dictionary game, it's not real. If something runs the elections, fights the wars, manage the municipal services and finances, then they are the state, that's what the word means. Corporations are part of the unelected bureaucratic administrative state.
We have state media, we just call it "corporate media" but that's merely a rhetorical slight of hand.