We've had a bit of turnover and I need to clear out some of the "dead wood" currently causing confusion in our Jira instance. There are a several dormant Portfolio Plans I'd like to delete and need to know who each "owner" is.
I don't have a great answer here, because their is no concept of an "owner" to a plan. The best thing you could do is to go to the plan>configure>permissions. In that view you would see who has edit permissions.