This book is to provide a practical guide for the new or veteran practitioner who advises clients in commercial and business matters relating to the selection, formation, and operation of Oklahoma business corporations, limited liability companies, limited liability partnerships, non/not-for-profit corporations, and limited partnerships. Additionally, the intention is to provide broad commercial law aspects of business entity formation and operation, including agency; promotors, managers and owner relationships and contracts; financing; distributions; dissolution and winding-up; regulation and compliance; and associated tax and commercial code issues. By gathering the statutes and case law relating to the Oklahoma General Corporation Act, the Oklahoma Revised Uniform Partnership Act, the Limited Liability Company Act, the Uniform Limited Partnership Act of 2010, and the Limited Liability Partnership Act, as well as certain special statutes, I have attempted to provide the practitioner with a reasonable guide through the labyrinth of statutory regulation. The book is oriented toward an exposition of the statutory and case materials with additional commentary, brief examples or illustrations, forms, checklists, and references in footnotes to additional or expanded source material. The reader will find reliance on case law from Delaware since the Oklahoma General Corporation Act is based on Delaware corporation law. With emphasis on Oklahoma law, the general flow of the book includes Oklahoma business entities and their characteristics, formation and operation, start-up financing the operations through securities offerings, extraordinary transactions including acquisition, merger, and sale of a business, insolvency, legal actions, and other commercial transactions. With emphasis on Oklahoma law, the general flow of the book includes Oklahoma business entities and their characteristics, formation and operation, start-up financing the operations through securities offerings, extraordinary transactions including acquisition, merger, and sale of a business, insolvency, legal actions, and other commercial transactions.