No one knows for sure, of course, but by the same token no one knows where shared information winds up. If paid enough or if coerced through some perks, naturally it is very likely that Apple would turn the data it collects from your iPhone over to the NSA if asked or even as a routine procedure because fingerprints are very helpful.
As someone who hopes Apple does turn fingerprints to Apple so the company would be destroyed. I don't think they will. It is unlawful and immoral for a company to give some body's identifying information to anyone even if it is the government. I hope they do but don't they will.