About Clark S.

Clark S — Willingham is a attorney based in Dallas, Texas, specializing in business law. He is a partner at Howell & Willingham, PLLC, where he offers a range of services in business law, estate planning, and tax law. The firm is known for its comprehensive approach to legal issues, helping clients navigate complex transactions and regulatory requirements. His experience allows him to handle various matters, from corporate governance to tax compliance, effectively serving clients. He earned his J.D. from Southern Methodist University in 1971, followed by an LL.M. from the same institution in 1984.

His academic foundation is complemented by a B.B.A. from Texas Tech University, obtained in 1967. This educational background provides him with a solid understanding of both legal and business principles, which he applies in his practice. His commitment to continuous learning is evident in his pursuit of advanced legal studies, enhancing his expertise in the field. Clark has been admitted to practice in multiple jurisdictions, including the U.S. Court of Federal Claims, the U.S. Supreme Court, and the U.S.

Tax Court. He is also licensed to practice in Texas, where he is known for his thorough knowledge of state and federal laws. His experience spans decades, and he has served as Of Counsel since 1971, contributing to the firm’s growth and success. Most of his work involves advising businesses on legal compliance, structuring transactions, and estate planning. He assists clients with tax-related matters, ensuring they understand their obligations and rights under the law. Cases typically involve intricate legal issues that require careful analysis and strategic planning. His approach is detail-oriented, focusing on the needs of each client while handling the requirements of the law.

Before his current role, he was involved in various capacities within the legal community, which has enriched his perspective on legal practice. Clark is an active member of several professional associations, including the American Law Institute, the American Bar Association, and the Dallas Bar Association. These affiliations keep him connected to the latest developments in the law and provide networking opportunities with other legal professionals. In 2026, Clark continues to be a vital resource for clients seeking legal guidance in business law, estate planning, and tax law. His dedication to his clients and the legal profession is evident in his ongoing contributions to the field. He remains committed to providing high-quality legal services while adapting to the ever-evolving legal field.

Education

Southern Methodist University

LL.M.

1984

Southern Methodist University

J.D.

1971

Texas Tech University - Texas Tech University

B.B.A.

1967

Languages

English (Spoken)

Experience

Of Counsel

Key Harrington Barnes, PC
1971

Partner

Howell & Willingham, PLLC

Accepted Jurisdictions

U.S. Court of Federal Claims
U.S. Supreme Court
Texas
U.S. Tax Court

Court Admissions

U.S. Court of Federal Claims
U.S. Supreme Court U.S. Supreme Court
Texas State Supreme Court
U.S. Tax Court

Types of Cases Handled

business law estate planning tax law

Legal Services Scope

Advising Compliance Transactions

Professional Associations

American Law Institute

Current

American Bar Association

Current

Dallas Bar Association

Current

Office Locations

Main Office

 6440 N. Central Expressway Suite 806 Dallas TX 75206