Expertise:

Biography

Bill Tanis has been a partner of Ireland Stapleton Pryor & Pascoe, PC since 1982. He has extensive experience in general corporate and securities law, including initial public offerings, private placements, partnerships, joint ventures, mergers and acquisitions, asset dispositions, and entity formations. Bill advises both public and private clients across a wide range of industries, including real estate, construction, equipment leasing, medical devices, banking, financial services, oil and gas, and renewable energy.

Bill’s practice also includes counseling companies through ownership transitions and advising nonprofit organizations. Throughout his career, he has worked closely with boards of directors and management teams on strategic planning, financial matters, employee incentive plans, corporate governance, and corporate restructurings.

Education & Admissions

Education 

  • J.D., Harvard Law School, 1975
  • M.S. Economics, London School of Economics,  1972
  • B.A., Dartmouth College, 1971

Admissions 

  • Colorado
Honors & Awards
  • Selected to The Best Lawyers in America® for Business Organizations (including LLCs and Partnerships) and Corporate Law, 2013-2025
  • Recognized by The Best Lawyers in America® as a 2021 “Lawyer of the Year” for Business Organizations (including LLCs and Partnerships)
Legal Experience
involvement & publications

Involvement

  • Colorado Bar Association
  • Colorado Bar Association Ethics Committee
  • Denver Bar Association
  • American Law Institute
  • Monte Pascoe Civic Leadership Award Committee Member
  • Board Member, Willows Water District

Featured Articles

Denver Office

Modern open lounge area with blue sofas, gray armchairs, a round wooden coffee table, pendant lights, and a mural of a bear with mountains in the background.

Fort
 Collins Office

Cozy seating area with two wooden armchairs with gray cushions, a wooden bench, a round wicker table, and large green plants near a tall window.

Grand 
Junction Office

Modern office lounge area with curved light sofa, round coffee table, cushions, plants, and a large window.