Does the parent company benefit(stock wise) if its spun off company does well?

I'm specifically talking about Harley Davidson and its spin-off company LiveWire. LiveWire has its own independent stock(it's publicly traded) and its own independent business. But what's really mind boggling is that Harley Davidson owns 74% of LiveWire.

So does that mean when LiveWire has a really amazing quarter with breaking all the sales records and profit records, its OWN stock which is LiveWire goes up but also Harley Davidson's stock goes up? It feels like it's "double counted". I'm very confused. Can anyone explain?