What document outlines the ownership and investment details of a partnership?

The correct answer is the deed of partnership, as it is a legal document specifically designed to outline the details of ownership and investment within a partnership. This document typically includes critical information such as the names of the partners, their respective ownership shares, the amount of capital contributed by each partner, the responsibilities and roles of each partner, and the procedures for handling disputes or changes in partnership.

A business plan, while important for guiding the strategic direction of a business, focuses more on objectives, market analysis, financial forecasts, and operational plans rather than the specifics of ownership and investment structure. Similarly, a partnership memorandum is not formally recognized as a part of legal documentation in most jurisdictions and may not provide the detailed ownership aspects that a deed of partnership covers. Lastly, a shareholder agreement pertains specifically to corporations and outlines the ownership arrangements, rights, and obligations of shareholders, making it irrelevant in the context of partnerships. Thus, the deed of partnership is the appropriate document that encapsulates all essential details regarding ownership and investment in a partnership.