who we are

A team built on experience and insight.

Our Story

Westfield was founded in 1989 and returned to independent, employee ownership in 2009. Today, we have a sharpened focus on serving institutional clients, but the same commitment to U.S. growth equity investing that has guided us from the beginning.

A team built on experience and insight. Westfield office through the entry door frosted glass

our philosophy

Built on research. Guided by experience.

Our philosophy centers on identifying under-appreciated growth at reasonable valuations. We believe stock prices follow earnings growth and that team-based, research-led investing leads to consistency through market cycles.

our history

A legacy of growth

Our journey began in 1989 with a focus on growth. Decades later, our history reflects a steady evolution—driven by our philosophy, shaped by our people, and marked by key moments of progress.
1989
Firm Founded
Westfield Capital Management is founded in Boston with a singular focus on growth equity investing and a commitment to delivering long-term results for institutional clients.
2001
Will Muggia Named CIO
Will Muggia is appointed Chief Investment Officer, bringing renewed focus and leadership to Westfield’s investment philosophy and team structure.
2001
Investment Committee Structure Formalized
Westfield formalizes its Investment Committee model, promoting shared insight, cross-sector collaboration, and research depth across the platform.
2009
Return to Employee Ownership
The firm returns to employee ownership—reinforcing alignment with clients and a long-term commitment to independent, team-based decision making.
2010-2020
Expanding Strategy Lineup
Westfield broadens its platform to meet evolving client needs through the launch of new strategies—including Dividend Growth, Select Growth, and Health Care.
2015-Present
Vehicle Capabilities Expanded
Westfield expands its vehicle offerings to meet client and market demand—introducing CITs, model delivery, active ETFs, and UCITS to provide broader access and implementation flexibility.
2021
6 Strategies Above $1 Billion in AUM
Westfield reaches a rare milestone with 6 strategies above $1 billion in AUM—reflecting the firm’s breadth and scale of high-conviction, research-driven portfolios.
2024
AUM Hits $24 Billion
Westfield surpasses $24 billion in assets under management—underscoring the firm’s growth, client trust, and consistent performance over time.

Our People, Our Perspective

“At Westfield, there’s a constant focus on improvement—whether it’s process, communication, or how we serve clients.”

“Everyone’s accessible here. It’s a flat structure that fosters openness, collaboration, and trust.”

“It’s rare to find a place where deep research, personal accountability, and real teamwork all show up in equal measure.”

A team built on experience and insight. Views of Worcester Square and the entrance to One Financial in Boston's Financial District at night time.

$24B

Assets Under
Management

A team built on experience and insight. Employees meeting in Westfield's office longe. Lounge tables in the foreground and the meeting taking place in a glass-wall room in the background.

60

Employees

A team built on experience and insight. Image of Boston's Leather District/Financial District skyline from the water.

1989

Year Founded

A team built on experience and insight. Teem meeting in Westfield Capital's board room, shot through the room's frosted glass wall to the hallway.
A team built on experience and insight. Profile of employee working from internal office in Westfield Capital's headquarters.
A team built on experience and insight. Westfield Capital employee in office working at the trading desk and taking a phone call.
A team built on experience and insight. Employees Meeting Casually in the Westfield Capital office lounge.

Our Culture

Driven by curiosity. Strengthened by collaboration.

At Westfield, we foster a culture where curiosity is encouraged and ideas are valued. We believe diverse perspectives and open dialogue lead to better outcomes—for our clients, our people, and the work we do together.

We’re a team that thrives on trust, transparency, and shared accountability. Whether collaborating across departments or tackling new challenges, we work together to grow—always aligned by purpose and integrity.

Careers & Culture

meet the team

Our Leadership

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