About
Hal WM. Ellis serves as Managing Partner, advising clients on estate planning, trusts, probate, fiduciary litigation, business, tax planning, and nonprofit matters. His practice focuses on clear guidance, careful administration, and long-term planning. Clients rely on steady judgment, compliance-driven strategies, and responsive counsel across complex transactions and proceedings.
Hal earned a B.B.A. with a concentration in Accounting and an M.B.A. from the University of Central Oklahoma. He later completed his J.D. at the University of Oklahoma College of Law. This academic foundation supports precise analysis, tax-planning insights, and disciplined legal judgment in professional practice today.
Hal practices across trusts, probate, estate administration, tax-deferred exchanges, business organizations, and tax exempt organizations. He is admitted in Oklahoma, the federal district courts, the Tenth Circuit, and the U.S. Tax Court. His background includes service on judicial and professional responsibility bodies, with long-standing statewide regulatory experience.
Hal has received professional recognition for ethics and excellence. He is a Fellow of the American College of Trust and Estate Counsel and serves as the Oklahoma State Chair. Honors also include Fellow of the American Bar Foundation, Super Lawyers Oklahoma, and Best Lawyers Oklahoma, based on statewide peer evaluations.
Hal has held leadership roles with bar organizations and public bodies, including service on appellate and governance committees. He also taught as an Associate Professor at Oklahoma State University. His published works address asset protection, tax-deferred exchanges, capital gains, and federal taxation issues for legal professionals nationwide.
Clients value Hal WM. Ellis for disciplined planning, careful administration, and practical solutions. He brings decades of experience to complex estates, fiduciary disputes, and organizational matters. His approach emphasizes clarity, compliance, and long-term stewardship, helping clients protect assets, meet obligations, and plan confidently through trusted legal guidance.
Law Office Affiliations
- Managing Partner, Ellis & Ellis
- Fellow, American Bar Association
- Fellow, American College of Trust and Estate Counsel
- State Chair, American College of Trust and Estate Counsel (2001-2006)
- Fellow, Board of Trustees, Oklahoma Bar Foundation
- President, Oklahoma Bar Foundation (2006)
- President, Payne County Bar Association (1986)
Licensed State
- Oklahoma
Education
- University of Oklahoma College of Law
Juris Doctor (JD) - University of Central Oklahoma
Master of Business Administration (MBA) - University of Central Oklahoma
BBA in Major: Accounting
Awards & Badges





- Business Litigation
- Contracts And Agreements
- Mergers And Acquisitions
- Tax
- Elder Law
- Probate
- Trusts
- Wills And Living Wills
- Commercial Real Estate
- Land Use And Zoning
- Residential Real Estate
- Guardianship




