An operating agreement is not a legally required document in the eyes of the Missouri state government and for this reason you needn’t file it with the Secretary of State. In fact, there is not obligation to draft one at all. However, we here and Start a Business recommend that all business entity organizers take a moment to consider the possible benefits of incorporating an operating agreement into the business structure of the entity┬áin question. As there will be limited information provided in the initial formation forms, the operating agreement often serves as the only legal proof regarding management of the internal affairs of your business. It is advisable that you have your attorney review the agreement before having each applicable organizer sign it and file a copy for their own personal reference. Below you will find a template in MS Word format as well as Adobe PDF to suit your needs.