Mercer Buys Massachusetts-Based Wealth Manager

Tom Burroughes

2 July 2025

Mercer Global Advisors, an RIA, has bought O’Brien Wealth Partners, a Waltham, Massachusetts-based firm, for an undisclosed sum.

The move comes after a number of other Mercer acquisitions, such as Full Sail Capital , and Financial Partners Group . Mercer is among a cluster of wealth managers that have bought a number of firms in a consolidation and M&A trend now well established in the US and Canada.

In the latest acquisition, Mercer said the O’Brien Wealth Partners business manages about $1.1 billion in client assets.

O’Brien was founded in 1986 and serves more than 500 individuals and families in New England.

“We were looking for a partner who could honor the care and continuity we’ve provided clients for decades, while advancing our vision for thoughtful, intentional growth,” Jill Fopiano, president and CEO of O’Brien Wealth, said.

“Mercer Advisors brings deep planning expertise, institutional-level capabilities and a genuine respect for how we serve. Just as importantly, they understand the power of diverse leadership and a collaborative culture, making this a natural next chapter for our team and the families we support,” Jill Fopiano, president and CEO of O’Brien Wealth, said.

By joining Mercer Advisors, O’Brien Wealth gains access to integrated family office services, including estate planning, tax strategy and preparation, corporate trustee services, and advanced investment management.

Colchester Partners served as the exclusive financial advisor to O’Brien Wealth.