On the record · Other
Grant Thornton
Sixth-largest accounting firm in the US. New Mountain Capital acquired majority stake in 2024 — first major PE acquisition of a top accounting firm
Research depth
Transactions sourced
At least one recorded transaction has a public source.
Record updated Sept. 11, 2026
Current ownership
Current owner not established
This record does not identify a current owner. That absence is a gap in the record, not a conclusion about ownership.
1 ownership record has an unresolved current/former status.
Ownership and transaction history
Chronology from recorded ownership periods, transactions and reviewed outcome events. Event order does not imply causation.
March 15, 2024
Acquisition announcedR1
Acquirer: New Mountain Capital · Sponsor: New Mountain Capital
Recorded history
Date not recorded
Sources and evidence
Recorded transaction sources
These support a recorded transaction row. They have not passed the separate evidence-review process.
- R1Grant Thornton to accelerate business strategy with investment from New Mountain Capital - New Mountain Capital
New Mountain Capital · Company announcement · March 15, 2024
Supports: Recorded transaction
What we do not know
These are gaps in the public record, not findings about the organization.
- The organization's operating status has not been researched.
- No current public ownership assessment has been published.
Help improve this record
Firsthand experience, public sources and corrections can help close the gaps above.