About
Louis D. Peterson is a highly experienced trial lawyer, mediator, and arbitrator known for handling complex commercial disputes across a wide range of industries. His practice includes securities, intellectual property, shareholder, and employment matters. He represents both individuals and businesses in high-stakes litigation matters across the United States.
Louis earned his A.B. in Economics from Harvard College, magna cum laude, in 1971. He then obtained his J.D. from Harvard Law School, magna cum laude, in 1974. These academic achievements reflect a strong foundation in both legal analysis and economic understanding, which supports his work in complex cases.
Louis has handled major litigation matters involving large corporations, financial institutions, municipalities, and universities. His work often involves cases with significant financial stakes, including matters exceeding one billion dollars. His experience spans industries such as biotechnology, airlines, timber, and collegiate athletics, showing a broad legal reach.
Louis is also widely recognized for his courtroom experience, having tried cases in multiple cities, including Seattle, New York, Chicago, and Atlanta. His work has taken him internationally as well, giving him insight into diverse legal environments. His trial strategies and detailed case preparation have led to favorable outcomes in complex disputes.
Louis has built a strong reputation as a mediator and arbitrator, serving in hundreds of disputes across the country. His ability to guide parties through difficult legal conflicts helps clients reach practical and efficient resolutions. His balanced approach and deep legal knowledge make him a trusted figure in alternative dispute resolution.
Louis has received multiple recognitions for his legal work, including repeated listings in The Best Lawyers in America across several litigation categories. He has also been rated among the top lawyers by Super Lawyers and named the 2015 Seattle Bet-the-Company Litigation Lawyer of the Year, reflecting consistent professional excellence.
Louis D. Peterson continues to apply his extensive litigation and dispute resolution experience to help clients navigate complex legal challenges. His work reflects a commitment to strong advocacy, careful analysis, and practical solutions, making him a respected figure in commercial litigation and high-value legal disputes.
Law Office Affiliations
- Attorney, Hillis Clark Martin & Peterson P. S.
- Member, King County Bar Association
- Member, Washington State Bar Association, Litigation Section
- Member, American Bar Association, Antitrust, Litigation, and Business Law Sections
Licensed State
- Washington
Education
- Harvard Law School
Juris Doctor (JD) - Harvard College
Bachelor of Arts (BA)
Awards & Badges



- Banking & Finance
- Corporate & Incorporation
- Franchise, Dealership & Partnership
- Limited Liability Company (LLC)
- Tax
- Employment Litigation
- Intellectual Property Litigation
- Appeals
- Arbitration
- Class Action




