Photo of William Duncan Crosby III.

William Duncan Crosby III

Member , Louisville KY


William Duncan Crosby III

Member , Louisville KY

Duncan joined the Louisville office of Stoll Keenon Ogden in 2003 and is a Member of the Utility & Energy and Trusts & Estates practice groups. He has extensive experience representing utility clients before the Kentucky Public Service Commission on base rate cases and matters ranging from planned acquisitions to environmental surcharge recovery. In his trust practice, he works with businesses and families throughout every phase of planning.

An Eagle Scout, Duncan graduated cum laude from Yale University and earned his J.D. at Harvard. He is also a graduate of Ignite Louisville, a program that cultivates high-potential professionals by developing key components of leadership. Clients and colleagues alike appreciate Duncan’s efficient, organized, and always friendly approach to service.

Utility & Energy: In this highly regulated industry, Duncan focuses on helping clients achieve their day-to-day operations goals and long-term strategic objectives. Among his many highlights are his successful efforts in helping a large gas and utility company recover $115 million in annual revenue and nearly $1 billion in new environmental capital investments.

Trusts & Estates: Duncan counsels clients with assets ranging from modest to millions. Whether developing a basic will or highlighting the difference between a durable power of attorney and a health care power of attorney, Duncan helps clients create plans for tomorrow that provide them peace of mind today.


Yale University, 2000, B.A.

Harvard Law School, 2003, J.D.


Admitted In

  • Kentucky

Professional & Community Activities

  • Faith Community Church, Elder, 2018-present


  • Kentucky Rising Stars® Honoree, 2017-2018

Work Highlights

  • Electric Utilities Counsel

    From 2004-2006, Duncan was state regulatory counsel for two electric utilities in connection with their successful and complete withdrawal from the Midwest Independent Transmission System Operator.

  • Rate Case

    Since 2009, Duncan served as counsel in four electric base rate cases before the Kentucky Public Service Commission that resulted in the approval of increases in electric base rates.


  • “Generations: Taking Care of What Matters”, Thrivent Financial and Metro Christian Legal Aid, Speaker, 2021

Contact Duncan Today

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