Ruben Chuquimia is a vice-chair of Polsinelli’s Securities and Corporate Finance practice group. He practices corporate and securities law, representing publicly traded companies and emerging growth companies, as well as private funds and other institutional investors. Ruben regularly counsels the companies he works with in the full range of corporate and securities matters, such as public offerings of equity and debt, SEC reporting, venture financing transactions and mergers and acquisitions. His practice also focuses on private funds, including the formation and operation of venture capital funds.

Ruben's public and private company practice includes a broad range of work, with extensive experience in the following areas:

  • Public/private equity and debt offerings
  • Venture transactions
  • Securities compliance, disclosure matters, and other counseling for companies with publicly traded securities
  • Mergers, acquisitions, divestitures, takeovers (negotiated and contested), and cross-border transactions
  • Counseling boards of directors and audit committees

Ruben regularly counsel private fund managers in all private fund matters, such as:

  • Venture and private equity fund formation
  • Institutional investments, and portfolio company representation,
  • Limited partner representation
He has been recognized for his leadership in corporate and M&A work by Chambers USA every year since 2011 and by Best Lawyers in America® every year since 2012.

Education

  • Washington University in St. Louis School of Law (J.D., 1995)
    • Duke University (B.A., 1992)

      Bar Admission

      • Missouri

      Professional Affiliations

      • American Bar Association
      • Bar Association of Metropolitan St. Louis
      • Arthritis Foundation of Greater St. Louis
        • Leadership Board, 2016-present

      Recognition

      • Named one of Missouri Lawyers Media’s Top Managing Partners 2025
      • Named to the Lawyers of Color 2023 Power List
      • Ranked in Chambers USA: America's Leading Lawyers for Business, Band 3, Corporate/M&A, Missouri: St. Louis and Surrounds, 2011-2025
      • Selected for Best Lawyers® "Lawyer of the Year" for Securities/Capital Markets Law in St. Louis, 2023
      • Selected for inclusion in Best Lawyers in America® for: 
        • Venture Capital Law, 2021, 2023-2026
        • Mergers & Acquisitions Law, 2013-2026
        • Securities/Capital Markets Law, 2013-2026
        • Corporate Law, 2012-2026
      • Named “Client Service All-Star” by BTI Consulting Group in 2009, one of 176 nationally recognized attorneys based on an annual survey of corporate counsel at Fortune 1000 companies to identify lawyers who provide outstanding service to clients
      • Selected by the St. Louis Business Journal as a “Dealmaker of the Year," 2000