You could build a contact list of all contacts with Deal Properties > Deal Stage is any of 'your stage'
Or you could create a custom deal property, bulk edit the deals in the affected stage to have a value in that property, and then build the list that way
You could build a contact list of all contacts with Deal Properties > Deal Stage is any of 'your stage'
Or you could create a custom deal property, bulk edit the deals in the affected stage to have a value in that property, and then build the list that way