The year 2025 marked a significant period of expansion for major U.S. law firms, with several reporting notable increases in attorney headcounts. This growth reflects the firms’ strategic efforts to meet rising client demands and enhance their market positions.
Kirkland & Ellis led the expansion, becoming the first firm to surpass 1,000 attorneys in its New York office, reaching a total of 1,133 lawyers—a 17% increase from the previous year. This growth was driven by heightened demand for private equity services, complex litigation, and regulatory work. ([lawfuel.com](https://www.lawfuel.com/the-largest-law-firms-in-new-york-2026-latest-rankings-market-analysis/?utm_source=openai))
Davis Polk & Wardwell also experienced substantial growth, exceeding 1,000 attorneys in its New York office for the first time, marking an 11% year-over-year increase. ([lawfuel.com](https://www.lawfuel.com/the-largest-law-firms-in-new-york-2026-latest-rankings-market-analysis/?utm_source=openai))
In Texas, Kirkland & Ellis expanded its presence by adding 51 lawyers in 2025, becoming the first firm to have 500 attorneys operating in the state. ([gtlaw.com](https://www.gtlaw.com/-/media/files/news/media-coverages/2026/04/texas-lawbook-50-despite-historic-demand-law-firm-headcount-grows-slowly.ashx?rev=-1&utm_source=openai))
Mid-sized firms also reported significant growth. Spencer Fane climbed to #105 in the 2025 NLJ 500 rankings, a 52-spot improvement over five years, reflecting a 24% increase in attorney headcount. ([spencerfane.com](https://www.spencerfane.com/insight/spencer-fane-continues-to-climb-nlj-500-and-law360-400-rankings-highlights-growth/?utm_source=openai))
Similarly, Lippes Mathias advanced 28 spots to No. 204 on the 2025 NLJ 500 list, increasing its headcount from 178 attorneys in 2024 to 219 in 2025. This growth was driven by mergers with CCBLaw and Ward Damon, PL, as well as lateral hires. ([lippes.com](https://www.lippes.com/insights/lippes-mathias-rises-28-spots-to-no-204-on-2025-nlj-500-list-of-largest-u-s-law-firms-2869?utm_source=openai))
These expansions underscore a broader trend of strategic growth among U.S. law firms, aiming to enhance their capabilities and address the evolving needs of their clients in a competitive legal landscape.