Hi Drew,
I just wanted to confirm Mark is right that if you put in a case with our Care team they can help you move your app from your builder account to your company account. It is just helpful to remember that you can't move apps in the other direction, you aren't able to move apps from a paying account into a builder account so if you wanted to keep a version of the app you can continue to tinker on and test in your builder account you might want to make a copy of it. Then when you are ready you can put in a case with our Care team and they can help you move the app to an account once they confirm with one of the account admins on that account that they want to accept the app. Besides in product you can also put in a case from here in Community by clicking on Support in the global navigation at the top of the page.
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Evan Martinez
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