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financial institution wants share member break down for single member LLC
What exactly would the financial institution need to see to make them   comfortable with these regulations The LLC Operating Agreement. The OA should specify the member's allocation of equity, assets, income and loss, and of course - managerial powers and signature authorities. In your case - it should say that the LLC is single-member entity and the single member has all the managerial powers and authorities - what is called "member-managed". Every LLC is required to have an operating agreement, although you don't necessarily have to file it with the State or record it. If you don't have your own OA, default rules will apply, depending on your State law. However, the bank will probably not take you as a customer without an explicit OA.