Methodology: The NLJ 500 is the National Law Journal's survey of the 500 largest law firms in the United States covering the previous calendar year. Data is collected from firms at the same time as the Am Law financial numbers. ALM sent surveys this year to more than 900 law firms to determine the 500 largest U.S.-centric firms by headcount. Firms smaller than No. 350 are divided into two tiers instead of earning individual ranks.

Lawyer totals are based on the average number of full-time equivalent (FTE) attorneys for the period between Jan. 1 and Dec. 31, 2022. For firms that did not participate in the survey, ALM research estimates lawyer counts based on information that is available on firm websites and collected in ALM's Legal Compass database as of Dec. 31, 2022. Those numbers are reduced by 5 percent to estimate average FTE lawyers for the calendar year.