Mayer Brown selected as a 2026 Illinois Powerhouse by Law360

CHICAGO – Mayer Brown has again been recognized by Law360 as a 2026 “Regional Powerhouse” in Illinois, honoring firms that have distinguished themselves through significant client work and market leadership in the state.

The profile highlights Mayer Brown's role advising on several of the region's most notable matters, including financings for Chicago O'Hare International Airport, the Chicago Transit Authority's major rail infrastructure projects, and R.J. O'Brien's more than $1 billion merger with StoneX Group Inc.

"Our Chicago office continues to play a leading role on transformative matters that shape businesses, infrastructure and communities across Illinois and beyond," said Joanna Horsnail, managing partner of Mayer Brown's Chicago office. "The depth of talent across our finance, corporate and litigation practices, combined with our longstanding commitment to Chicago, allows us to deliver exceptional results for clients while contributing to the continued growth of this dynamic market."

Founded in Chicago in 1881, Mayer Brown's Chicago office remains one of the firm's largest offices globally and is widely recognized for its strengths in finance, corporate, litigation, and infrastructure work, which has played a central role in many of Chicago's most significant transactions and development projects throughout its history.

The Law360 profile also highlighted the office's continued success in attracting talent and serving a broad range of clients amid a growing and increasingly competitive Chicago legal market.

Read Mayer Brown's profile here.