Michael Weiner

Michael Weiner

Denver P +1 (303) 352-1156 F +1 (303) 629-3450 Palo Alto P +1 (650) 565-2233 F +1 (650) 857-1288



Michael is a partner in Dorsey's Corporate Group, the head of the Corporate department in Denver and co-head of the cannabis industry group. His practice focuses on the representation of emerging growth companies in the areas of corporate formation, mergers and acquisitions, venture capital and angel finance, and securities regulation. Michael represents public and private companies in a variety of industries, including biotech/medical device, renewable energy, social media and software. In addition, he counsels Boards of Directors and management teams in the areas of equity compensation, corporate governance, Sarbanes-Oxley and other regulatory and disclosure matters.

Michael has successfully completed numerous venture capital and other private placements for both private and public companies, as well as several public offerings. He has also completed multiple mergers and acquisitions, including asset purchase transactions.

Michael serves on the Board of Directors of the Colorado BioScience Association. He is an adjunct professor at the University of Colorado School of Law co-teaching drafting of venture capital agreements.

Michael is an Assistant Scoutmaster for Boy Scout Troop 9 in the Denver Area Council, Arapahoe District.

Education & Admissions

University of California, Los Angeles (UCLA), School of Law (J.D., 1994)

University of Pennsylvania (1990), B.S. Economics, Wharton School of Business; B.A. American History, College of Arts & Sciences


  • Colorado
  • California

News & Resources


USDA Releases Interim Rules for Domestic Hemp Production
California Court Enforces Arbitration Clause in Cannabis Contract
Governor Polis approved bills for social consumption and delivery of Cannabis
FDA Conducts First Public Hearings Regarding CBD
Colorado Expands Ownership of Cannabis Companies
Illinois to Legalize Cannabis
Hemp CBD After the Farm Bill
Updated Draft of California’s Cannabis Regulations Could Stifle IP Licensing
California’s Cannabis Regulations Could Stifle IP Licensing
Are Hemp Derived CBD Oil Products Legal?

News & Press Mentions

Dorsey Partner Mike Weiner Remarks on No Hemp Growing in S. Dakota
Dorsey Partner Mike Weiner Comments on USDA Hemp Rules
Dorsey Partner Mike Weiner Discusses Cannabis Branding and IP
Dorsey Launches New Cannabis Blog
Dorsey Partners Weiner and Lynyak Discuss Sessions Recinding Cole Memo
Dorsey Partner Michael Wiener Comments on Legalization of Recreational Marijuana
Dorsey Partner Mike Weiner Discusses Colorado Bill for Small Business Crowdfunding
Dorsey’s Cleantech Group Leaves Their Footprint from the West Coast to the Midwest and Back!
Dorsey & Whitney Named Capital Markets Law Firm of the Year-North America by Lawyers World Law
Facebook IPO Interview on NPR
"Facebook Execs Could Be Headed To Denver," CBS Denver

Events & Speaking Engagements

Rocky Mountain Region Cleantech Open Business Clinic

Industries & Practices

Non-Profit & Tax Exempt Organizations
  • Cannabis
  • Capital Markets
  • Corporate Governance & Compliance
  • Emerging Companies
  • Energy & Natural Resources
  • Food, Beverage & Agribusiness
  • Healthcare
  • Mergers & Acquisitions
  • Non-Profit & Tax Exempt Organizations
  • Sustainability
  • Technology
  • Technology Commerce
Michael Weiner