Yes, only the turret. The hull and everything else were produced by Henschel.

When the 'Tiger II project' began, Henschel and Porsche made their own prototypes.

Meanwhile Krupp designed two different turrets: one for the Henschel (aka: Krupp production turret) prototype, and one for the Porsche.
Finally, Henschel won the project, because they developed the new tank much faster.

There is only one reason why the first fifty Henschel Tiger IIs got Porsche-turrets: the Henschel turrets weren't ready yet.
The rest of the later built Tiger IIs (439) got the simplified (but heavier) Henschel turrets.

So it's a bit strange: they are known as 'Porsche Königtigers', but in fact the turret was designed by Krupp.