Yes, I don't know anything about ownership, but I wouldn't be surprised if all molds are the property of Disney. But I'm pretty certain that both Hasbro and Disney are just customers/clients at the factories that produce all their products.
We'll probably never know for sure unless an employee shares some inside info.
It's also quite silent around Hasbro and their license. As George once said, "(the money)It's all in the action figures."
So I bet Disney is very eager on getting that revenue all for themselves. I suppose Disney will present Hasbro a contract that is to their absolute disadvantage so that Hasbro will have to pass on extending the license. So Disney can say, we offered a new contract, but our licensee (Hasbro) passed. I don't want to bet, but maybe it will be for the better. I never thought I'd say this, but the current state of the 3.75" Star Wars line is worse than ever before. We hardly get any NEW! product and HasLow is running on low flame. Only their beloved Black Series receives maximum love & attention. Something I will address at Comic Con tomorrow. I'm NOT willing to pay 17,99€ for a Vintage Figure while their "PREMIUM" Black Series figures are sitting on discount for 14,99€ on the exact same shelf!