Robert Plesnarski


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Rob Plesnarski represents public and private companies, investment banks, private equity funds, hedge funds and other market participants in a full range of regulatory and transactional securities law matters.

Rob provides securities law regulatory advice to issuers, underwriters and institutional investors in US and international public and private offerings of equity, debt and derivative securities, with a particular focus on transactions involving equity derivatives or restricted or control securities. Rob also counsels Fortune 100 corporations, small public companies, investment funds and other clients in connection with federal and state securities law topics, including SEC disclosure best practices, corporate governance, beneficial ownership reporting under Sections 13 and 16 of the Exchange Act, SEC rules related to federal proxy matters, mergers and acquisitions and tender offers, and SEC enforcement matters. Rob regularly provides securities law advice with respect to the Securities Act of 1933, the Securities Exchange Act of 1934, the Trust Indenture Act of 1939, the Investment Company Act of 1940, the Investment Advisors Act of 1940, the Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and Consumer Protection Act, and the JOBS Act.

Rob is consistently selected for inclusion as a top lawyer in Chambers USA, with Chambers noting that Rob “came highly recommended by sources, with several stressing his strength of substantive knowledge and his excellent rapport with clients” and that "on extremely complex issues, he's been phenomenal."


Corporate & Government Experience

  • Deputy Chief Counsel, United States Securities & Exchange Commission

Honors & Awards

  • Recognized by Best Lawyers® for Securities / Capital Markets Law in Washington, DC (2024)
  • Top Ranked Securities Regulation: Nationwide, Chambers USA 
  • SEC Capital Markets Award


Bar Admissions

  • District of Columbia
  • Pennsylvania


  • Temple University, J.D., 1991: cum laude; Temple Law Foundation Scholarship 
  • Dartmouth College, B.A., 1987: magna cum laude

Professional Activities

Board of Advisors


Press Releases

One Hundred O’Melveny Lawyers Recognized by Best Lawyers in America ® 2024

August 17, 2023

O’Melveny Advises Liberty Media on Split-Off of Atlanta Braves Holdings and Reclassification of Tracking Stock

August 8, 2023

O’Melveny Represents Belite Bio in Follow-on Offering

June 7, 2023

O’Melveny Earns Top Rankings in Chambers USA 2023

June 1, 2023

O’Melveny Represents Beauty Farm in US$100 Million Hong Kong IPO

January 16, 2023

O’Melveny Advises Next Bridge Hydrocarbons in Spin-Off Transaction from Its Publicly-Traded Parent

January 11, 2023

O’Melveny Represents Cryofocus in its Hong Kong IPO

December 30, 2022

O’Melveny Represents 3D Medicines Inc. in US$52 Million Hong Kong IPO

December 15, 2022

O’Melveny Represents Rainmed Medical in its Hong Kong IPO

July 8, 2022

O’Melveny Earns Top Rankings in Chambers USA 2022

June 8, 2022

Alerts and Publications

In the News