New Mountain Capital-backed Grant Thornton to merge with Grant Thornton Ireland.

New Mountain Capital-backed Grant Thornton, a provider of audit and assurance, tax, and advisory services, agreed to merge with Grant Thornton Ireland, a provider of audit and assurance, tax, and advisory services. Financial terms were not disclosed. “This is a landmark year, as we’re commemorating Grant Thornton’s 100th anniversary in the US, and I can’t think of a better way to do it than by spearheading a seamless and integrated global platform with Grant Thornton Ireland — one that puts us in the vanguard of high-growth and high-quality firms," Seth Siegel, Grant Thornton CEO.