Professional Biography
Image of Sonny Allison

Garland (Sonny) W. Allison Partner

  • Denver

    D +1.303.291.2314

    F +1.303.291.2400


    1900 Sixteenth Street, Suite 1400

    Denver, CO 80202-5255




Sonny Allison, a partner in the firm's Corporate practice, focuses his practice on mergers and acquisitions, private equity, and corporate finance and securities.

Sonny regularly counsels public and private companies and private equity funds in corporate transactions, corporate governance matters and securities law compliance matters. He has extensive experience with public and private mergers and acquisitions, leveraged buyouts and recapitalizations, tender offers and going private transactions, asset acquisitions and dispositions, initial public offerings, follow-on offerings, PIPE and 144A transactions and private placements.

Sonny is a frequent speaker and author on mergers & acquisitions trends and issues faced by public companies and boards of directors.

Chambers 2021 Logo

Ranked by Chambers USA 12 Years in a Row

Professional Recognition

  • Ranked by Chambers USA: "America's Leading Lawyers for Business" (Corporate/M&A), 2010 - 2021
  • Listed in The Best Lawyers in America: Mergers & Acquisitions Law, 2013 - 2022
  • Listed in Super Lawyers, "Colorado Super Lawyers," Mergers & Acquisitions, 2014 - 2021
  • Listed in Super Lawyers, "Colorado Rising Stars," Mergers & Acquisitions, 2012 - 2013

Related Employment

  • Brobeck, Phleger & Harrison LLP, Denver, CO, Associate, 2000 - 2002
  • Skadden, Arps, Slate, Meagher & Flom LLP, NY, Summer Associate, Associate, 1998 - 2000
  • U.S. Securities and Exchange Commission, Washington, D.C., Summer Honors Program






Bar and Court Admissions

  • Colorado
  • New York


  • The University of Michigan Law School, J.D., 1998, Editor, University of Michigan Journal of Law Reform
  • Dartmouth College, A.B., Economics and Government, with high honors, 1995,


Bio In Other Languages

Simplified Chinese Bio | 中文简体