Private company

Haynes and Boone

Logo: haynesboone.com3

Multinational corporate law firm

Haynes Boone is an international corporate law firm headquartered in the Harwood Historic District of Dallas, Texas. It is among the largest law firms based in the United States and provides services for more than 40 major legal practices. More than 750 lawyers practice across 21 global offices in California, Colorado, Illinois, Massachusetts, New York, North Carolina, Texas, Virginia, Washington, D.C., London, Mexico City and Shanghai.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1970Founded1

Haynes Boone is an international corporate law firm headquartered in the Harwood Historic District of Dallas, Texas. It is among the largest law firms based in the United States and provides services for more than 40 major legal practices. More than 750 lawyers practice across 21 global offices in California, Colorado, Illinois, Massachusetts, New York, North Carolina, Texas, Virginia, Washington, D.C., London, Mexico City and Shanghai.2

The story

Haynes Boone was founded in 1970 by partners Richard D. Haynes (1936–2001), and Michael Boone, who had been his student at Southern Methodist University. The firm offers full legal services across multiple sectors, including energy, financial services, private equity and technology. Noted attorney Nina Cortell joined the firm after graduating law school in 1976, as its 13th attorney.

Haynes and Boone built their office from a securities practice, handling IPOs in Dallas from the late the 1960s onward. In 1984, the firm opened a second office in Fort Worth, followed by a third office in Austin two years later. Haynes Boone expanded to Houston in 1990 through a merger with Watt, White & Craig.

The North American Free Trade Agreement (NAFTA) spurred the firm's next expansion. In 1994, it opened its first two offices outside of Texas: a cross-border branch in Mexico City and an out of state branch in Washington, D.C. At that time, the firm had established seven offices and had over 300 lawyers, 30 of whom were international lawyers. The firm continued to grow, adding offices in New York City in 2004, Orange County and Palo Alto in 2009, Shanghai in 2013, Chicago and Denver in 2015, London in 2016, the Woodlands in 2018, Charlotte in 2019, San Francisco in 2020 and Northern Virginia in 2023.

From Wikipedia’s article on Haynes and Boone, shared under CC BY-SA 4.0.4

Timeline

  1. 1970Founded Founded1

Sources

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    Company websiteHaynes and Boone logo
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