Stax

Grant Thornton Stax is a management consulting firm operating as a wholly-owned subsidiary of Grant Thornton Advisors LLC, with a 30-year track record focused on commercial due diligence and value creation for private equity firms and corporations. Its primary buyers are PE sponsors and corporate clients evaluating acquisitions, planning exits, or pursuing growth strategies. Family office relevance is limited and indirect: the firm does not offer wealth management, investment administration, or family office operational services as a stated offering.

For a family office considering this vendor, the most plausible engagement scenario is as an investor in private equity-backed businesses, where Stax might be retained to conduct buy-side commercial due diligence on a target company. The firm has completed over 3,000 private equity engagements and advised on deals totaling $275 billion in aggregate deal value. Its financial services sector work includes engagements in banking, wealth and asset management, insurance, and financial technology, as evidenced by a published whitepaper analyzing the European wealth management software landscape.

Stax’s core service lines relevant to a PE-oriented family office include:

• Buy-side commercial due diligence on acquisition targets
• Sell-side positioning and exit planning support
• Growth strategy and value creation advisory for portfolio companies
• Data and analytics to validate market sizing, competitive positioning, and demand drivers

This is not a vendor a family office would engage for portfolio reporting, consolidated accounting, compliance, or any day-to-day operational function. Pricing is project-based and not publicly disclosed. Stax is best suited to family offices running a direct investment or co-investment program that requires independent commercial validation of targets, rather than offices seeking operational or administrative infrastructure.