M&A advisorBuy-side and sell-side
Harborstone Group
New York, NY
Profile last reviewed
October 2026
Public information can change. Corrections are reviewed before publication.
Overview
Overview of Harborstone Group
Harborstone advises business owners, including companies with at least $10 million in revenue, on selling, scaling, and planning an exit. Its services include sell-side and buy-side M&A advisory, business valuation, and deal structuring. The firm serves professional services businesses and says its team has set valuation records in that sector, including double-digit multiples for firms without traditional recurring revenue.
Named principal
John Curtin
CEO & Partner
Profile details
Details for Harborstone Group
- Representation
- Buy-side and sell-side
- Firm type
- M&A advisor
- Based in
- New York, NY
- Engagement coverage
- New York, NY
- Industry focus
- Professional services
Office locations
Headquarters and public offices
Headquarters
New York, NY
Profile sources
This profile was compiled from publicly available firm information. Sources are grouped by website, while the underlying page-level evidence is retained for review.
- Open source
Firm website
harborstonegroup.com · checked October 2026