A sole proprietorship is an unincorporated business in which all assets are owned by one person. Owners of sole proprietorships usually use their own social security number on the account. The phrase Doing Business As (DBA) in the account title usually signifies that the account is held by a sole proprietorship. Sole Proprietorship accounts are insured in the single account category as the personal <a href="javascript:glink('shares')">shares</a> of the owner.