Kirkland & Ellis looks likely to retain its title as the largest law firm in the U.S. by revenue, after a year in which the Chicago-founded firm grew its top line more than 18 percent to $3.76 billion and its profits per equity partner topped $5 million for the first time, according to preliminary ALM data.

The firm’s financial growth was propelled by a 15 percent headcount increase, adding more than 300 lawyers to reach 2,306. Kirkland last July opened an office in Dallas, where the firm now has nearly 40 lawyers.