HMDA Loan - yes or no?

We have an Agriculture Corporation (son & wife) who are purchasing half of a ranch that belongs to his parents. The deed is currently in the parents name. The loan will be paying off the balance that the parents owe at another financial institution. The grantors on the new deed will be all four as they will each own 50%. Is this considered a purchase (as the son is purchasing half) or a refinance (as the parent's already owned it and we are paying it off)?

Thank you!

Got my answer. Thank you!

And what did you decide?

Curious to know your answer too...