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Mercer Advisors Acquires O'Brien Wealth Partners, Enhancing Client Services and Expanding Presence in Boston

Strategic Insights

— 1 min read

Mercer Global Advisors, a leading national Registered Investment Adviser, has announced the acquisition of O'Brien Wealth Partners, a Waltham, Massachusetts-based firm providing comprehensive wealth management and planning services to high-net-worth individuals, families, and nonprofits. This partnership brings together two firms with a shared commitment to client-first planning and values-driven approach to multigenerational and next-gen wealth planning.

Key Takeaways:

  • The acquired firm, O'Brien Wealth Partners, manages approximately $1.1 billion in client assets and serves over 500 individuals and families in New England and beyond.
  • The partnership deepens Mercer Advisors' footprint in the Greater Boston area and adds a next-gen team aligned with its planning-centric, client-first philosophy.
  • O'Brien Wealth brings a distinctive, high-touch model and a forward-thinking team that aligns well with Mercer Advisors' service philosophy.
  • The partnership provides additional resources to support career development for team members and strengthens the firm's long-term growth trajectory in New England.
  • Colchester Partners served as the exclusive financial advisor to O'Brien Wealth.
  • The partnership is a strategic move for both firms, allowing them to preserve and accelerate their future growth and deliver sustainable value to their clients.
  • The O'Brien Wealth team, led by President and CEO Jill Fopiano, has built a strong culture of mentorship, inclusion, and excellence that reflects where the industry is headed.

Statistics:

  • Mercer Advisors manages $72 billion in client assets as of April 30, 2025.
  • The firm has over 1,280 employees and operates nationally through more than 100 locations.
  • Mercer Advisors is a majority-owned subsidiary of Oak Hill Capital, Genstar Capital, and Altas Partners.
  • The acquired firm, O'Brien Wealth Partners, manages approximately $1.1 billion in client assets under management (AUM) and client assets under advisement (AUA).

Sources:

  • BusinessWire: "Mercer Advisors Acquires O'Brien Wealth Partners"
  • Mercer Advisors: "About Us" page
  • Barron's: "Barron's Top 100 Registered Investment Advisor Firms" list (2024)
  • Mercer Advisors' website: "Mercer Advisors Inc." page.

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