Pathstone announced that it has combined with Mill Creek Capital Advisors, effective June 1, 2026, expanding its presence in the Philadelphia region and strengthening its capabilities serving ultra-high-net-worth families, single-family offices, and institutions.
Founded in 2006 and headquartered in Conshohocken, Pennsylvania, Mill Creek is an independent registered investment adviser serving approximately 450 families and institutions and advising nearly $12 billion in assets. The combination unites Mill Creek with Pathstone’s existing Newtown Square office, creating one of the largest independent RIA footprints in the Philadelphia metropolitan area.
The firms said the transaction brings together organizations with closely aligned cultures, values, and client service philosophies. Pathstone noted that its growth strategy is centered on enhancing client experience, expanding capabilities, and creating opportunities for employees while maintaining a personalized advisory approach.
According to the announcement, Mill Creek contributes approximately $12 billion in advised assets, nearly 450 client families and institutions, and 46 professionals to Pathstone. The transaction closed effective June 1, 2026.
The combination significantly increases Pathstone’s scale in the Philadelphia market. Together, the Conshohocken and Newtown Square offices now include more than 120 team members and advise on nearly $30 billion in assets.
Colchester Partners served as financial advisor to Mill Creek, while Cozen O’Connor acted as legal counsel. Alston & Bird served as legal counsel to Pathstone.
Pathstone is an investment and wealth advisory firm serving individuals and families of significant wealth, family offices, and institutions. As of December 31, 2025, the firm reported more than 775 team members across 22 offices and approximately $185 billion in aggregate assets, including affiliate firms. The company is privately owned with significant employee participation and is backed by Kelso & Company and Lovell Minnick Partners.
Founded in 2006, Mill Creek Capital Advisors provides advisory and investment management services to ultra-high-net-worth families, single-family offices, and institutions, with approximately $12 billion in assets under advisement and management.
KEY QUOTES:
“From our earliest conversations, it was clear that Pathstone and Mill Creek shared a common view of what matters most: serving clients with depth, care, objectivity, and continuity. Pathstone’s culture, capabilities, and long-term orientation made this a natural next step for our clients and our team.”
Joshua Gross, Chief Executive Officer, Mill Creek Capital Advisors
“Mill Creek brings an exceptional team, deep client relationships, and a highly respected presence in the Philadelphia region. Coming together strengthens our ability to serve ultra-high-net-worth families, single family offices, and institutions with the personalized, differentiated advice they expect from Pathstone in Philadelphia and beyond.”
Matt Fleissig, Chief Executive Officer, Pathstone
