Roger Royse is a partner in the Palo Alto office of Haynes and Boone, LLP and practices in the areas of corporate and securities law, domestic and international tax, mergers and acquisitions, and fund formation. He works with companies ranging from newly formed tech startups to publicly traded multinationals in a variety of industries.

Roger is a Fellow of the American College of Tax Counsel and former chair of several committees of the American Bar Association Sections of Business Law and Taxation. Roger has been an instructor or professor of legal, tax and business topics for the Center for International Studies (Salzburg, Austria), Golden Gate University School of Law and Stanford Continuing Studies.

Roger is a nationally recognized authority on agtech – the technology of food production - and the legal considerations for companies in this industry. Roger is also the author of Dead on Arrival: How to Avoid the Legal Mistakes That Could Kill Your Startup and 10,000 Startups: Legal Strategies for Startup Success and has been interviewed and quoted in the Wall Street Journal, Forbes, Fox Business, Chicago Tribune, Associated Press, Tax Notes, Inc. Magazine, Nikkei Asian Review, China Daily, San Francisco Chronicle, Reuters, The Recorder, 7X7, Business Insurance and Fast Company.

Roger is also a Certified Public Accountant (California non-Attest).

Professional and Community Activities

  • Board Member, Asian Inc.
  • Fellow of the American College of Tax Counsel
  • California Co-Chair of the Fellows of the American Bar Foundation
  • American Bar Association (“ABA”) Business Law Section Liaison to the Section of Taxation
  • Member, Executive Committee, California Lawyers Association, Taxation Section
  • Chair, City of Menlo Park Finance and Audit Committee (2021-2022)
  • Palo Alto Area Bar Association, Past President
  • State Bar of California Past Chair, Tax Policy, Practice and Legislation of the Taxation Section
  • Member of the ABA Task Force On Tax Legislation (2018-2019)
  • Past Chair of the Committees on Tax Practice Management and Tax Policy of the ABA Tax Section; Past Chair of the Taxation Committee of the Business Law Section; Past California State Delegate to the ABA House of Delegates
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  • Recognized by The American Lawyer in 2022 as a “West Trailblazer” for his leadership in AgTech
  • Recognized by Northern California Super Lawyers, Thomson Reuters, 2011-2022
  • Martindale Hubbell® Law Directory with a Peer Review Rating of AV® Preeminent™
  • Recognized as a “Top Attorney” with a “10.0 Superb” Avvo Rating
  • Recipient of The Recorder Legal Innovator Awards 2014 and 2015
  • Recognized by The Leukemia & Lymphoma Society as the “2012 San Francisco Bay Area Chapter Man of the Year”


J.D., University of North Dakota

LL.M., Taxation, New York University School of Law

B.S., Accounting, University of North Dakota





North Dakota

New York

South Dakota

Court Admissions

U.S. District Court for the Northern District of California

U.S. Tax Court

Press Release
Haynes Boone Represents Eighteen Ninety Partners in Management Buyout of Financial Firm
November 04, 2022

A Haynes and Boone, LLP deal team led by Partner Roger Royse represented Eighteen Ninety Partners, LLC in a management buyout of the current non-operating shareholders of Moors & Cabot, a 132-year-old diversified financial services and wealth management firm headquartered in Boston with offices throughout the country. The transaction closed Oct. 27. Eighteen Ninety Partners is owned and controll [...]