2024 DIVERSITY DATABASE UNDERWRITER Haynes and Boone, LLP

From its roots in Dallas, Haynes Boone has grown into a full-service firm with offices across the United States and key global markets, advising clients on complex domestic and cross-border matters. While the firm maintains a strong presence in Texas, it has expanded nationally, establishing a significant presence in New York, and internationally, with offices in London, Mexico City, and Shanghai.

Like Teacher, Like Student

With $1,600 and a handful of small clients, Richard Haynes opened a solo law office in Dallas in 1964 while teaching Securities Law at the Southern Methodist University Dedman School of Law. Michael Boone joined Haynes’ office when he graduated in 1967 after impressing Haynes as a student in his classroom. The firm became Haynes and Boone, LLP, three years later. Over the following decades, the firm grew along with the Texas economy and is now an elite Texas, U.S., and international firm. With more than 750 attorneys, Haynes Boone is a consistent member of the Vault 100 and the AmLaw100.

Booming in The Boardroom

Haynes Boone is a full-service firm that advises on matters in more than 40 areas, including corporate, energy, financial services, real estate, restructuring, litigation, and intellectual property law, as well as international arbitration and global regulatory matters. Communicating in more than 34 languages, Haynes Boone lawyers represent and advise clients in various industries and in different stages of growth, from emerging companies to Fortune 500 and S&P 500 businesses in the United States and around the world.

Recently, the firm advised an energy hyperscaler on its $682.5 million initial public offering (IPO ) and $13.8 billion dual listing on Nasdaq and the London Stock Exchange (LSE), one of the largest IPOs in LSE history and the first simultaneous dual listing of its kind this century.

Innovation in Practice

Haynes Boone takes a forward-thinking approach to the practice of law, investing in technology and innovation to enhance client service and collaboration. The firm has developed tools that provide clients with real-time access to matter status, documents, and costs, improving transparency and efficiency.

Attorneys also counsel clients on emerging legal and business issues, including digital transformation, data governance, and social media use in the workplace. This work reflects the firm’s broader commitment to delivering practical, business-minded solutions in a rapidly changing legal and regulatory environment.

• Haynes Boone advised Fermi America on its $682.5 million initial public offering and $13.8 billion dual listing on Nasdaq and the London Stock Exchange, the first transaction of its kind this century and one of the largest IPOs in London Stock Exchange history.
• Haynes Boone secured a major First Amendment victory in Book People, Inc. v. Wong, with a federal court striking down Texas’ book-rating law as unconstitutional, setting a significant precedent on compelled speech and the regulation of access to books in schools.
• Haynes Boone represented Rexmark Holdings in securing a $505 million settlement with Amtrak related to the acquisition of its leasehold interest in Union Station in Washington, DC, resolving what is believed to be the largest eminent domain case in U.S. history based on valuation.
• Haynes Boone secured an appellate victory protecting Corelle Brands’ Chapter 11 reorganization, with a federal court affirming a key ruling that purchase orders are separable from master supply agreements—an important precedent preserving flexibility in corporate restructurings.

• 103 lawyers, (15 Band 1) and 16 practices (six newly ranked), 2026—Chambers USA
• Gold Bell Seal for Workplace, 2025—Mental Health from Mental Health America
• M&A Advisor Deal of Year in the $100M+ and $250M-500M categories and No. 2 Best Performing Federal Circuit Practice, CAFC reports, 2025—LexDana
• Band 1 in Aviation and Real Estate among Top International Law Firms, 2025—Latinvex