Haynes and Boone, LLP is an American Lawyer top 100 international law firm with 20 offices across the United States, London, Mexico City, and Shanghai. With more than 750 lawyers, the firm offers a full spectrum of legal services, with particular strengths in energy, technology, financial services, and private equity. Haynes Boone’s London office provides UK and international clients with strategic legal advice across transactional and contentious matters, working seamlessly with the firm’s global platform on complex cross border work, and is ranked in the Chambers UK 2026 guide across multiple practice areas, with individual lawyer rankings reflecting its reputation for high quality client service and cross border expertise.