New Mountain Capital, an investment firm, completed the $3bn investment in Grant Thornton, a provider of audit and assurance, tax, and advisory services. “We continue to be impressed by the Grant Thornton team and their unwavering focus on delivering the highest levels of quality and client experience. In this next chapter, we look forward to partnering with the team to invest even further in people, technology and new service line capabilities to accelerate the growth trajectory Grant Thornton is already on,” Andre Moura, New Mountain Capital Managing Director.