As of 2019, Grant Thornton was the sixth largest accounting firm in the United States[3] and had 59 offices with more than 550 partners and 7,000 employees.

[4] In March 2020, Grant Thornton LLP teamed up with GroupSense to offer digital crime mitigation technology.

[9] In March 2024, the company announced a deal where private equity firm New Mountain Capital would acquire a majority stake.

At the time of the announcement, it was the seventh biggest accounting firm in the US, after the Big Four (Deloitte, EY, PwC, and KPMG), RSM, and BDO.

Specific advisory services and areas of expertise include: Sarbanes-Oxley compliance, mergers and acquisitions advice, tax, and business valuations.

Target industries include construction, distribution, energy, financial services, food and beverage, healthcare, hospitality and restaurants, life sciences, manufacturing, not-for-profit organizations, private equity, real estate, retail, technology, and transportation.