Boston, MA Office

Team
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William Blair & Company L.L.C.

Enterprise

Firm-wide stats for William Blair & Company L.L.C.

Total advisors

335

Across 63 offices

Clients per advisor

105 High

Avg AUM per client

$1,492,448 Very High

HNW client ratio

26% High

About

William Blair’s Private Wealth Management division provides discretionary and non‑discretionary investment management, financial planning and wealth services to individuals (including high‑net‑worth clients), foundations, pension and corporate clients. The firm also sponsors a wrap fee program, supports platform and sub‑advisory arrangements, and distributes affiliated pooled products while operating as an SEC‑registered investment adviser and broker‑dealer.

The firm pursues active, research‑driven management across equities, fixed income and alternative strategies, offering proprietary home‑office models and model portfolios to advisory clients and to other registered investment advisers through a Non‑Discretionary Model Portfolio Program. PWM advisors may hire third‑party Sub‑Managers through platform providers or engage the affiliate William Blair Investment Management LLC (WBIM) as a sub‑adviser, and William Blair provides access to private funds and co‑investment opportunities via its MB Investments Program.

Notable features in the brochure include the firm’s scale — roughly $64 billion in reported AUM and a reported 322 advisors, implying approximately $200 million of AUM per advisor — and an in‑house MB Investments structure where clients must affirmatively elect participation and where an affiliate (the MB General Partner) performs valuation and may receive carried interest. The brochure also details integrated operational relationships with custodial/clearing and platform providers (including NFS) and affiliated product conduits (WBIM, affiliated mutual funds and private funds), which influence product access, allocation and certain fee and credit arrangements.

Based on William Blair & Company L.L.C.

Expertise

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k)

Based on William Blair & Company L.L.C.

Occupation focus

Founder/Business Owner Executive

Based on William Blair & Company L.L.C.

Location

125 High Street, Oliver Street Tower Suite 1901

Boston MA 02110

Advisors at this office

10

Advisors at this office

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Beth G

CFP®, Series 63, Series 65

Boston, MA

William Blair

Beth Griffith is a CFP® professional with 22 years of experience in the financial industry. She has worked at William Blair since 2017 and previously spent 12 years at UBS Financial Services. She holds Series 63 and Series 65 licenses. William Blair’s Private Wealth Management division offers discretionary and non-discretionary investment management, financial planning, and wealth services to individuals, foundations, pension plans, and corporate clients. The firm employs an active, research-driven approach across various asset classes and provides access to proprietary models, third-party sub-managers, and private investment opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
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Karen E

Series 66

Boston, MA

William Blair

Karen Eames is a financial advisor at William Blair with a Series 66 designation and 10 years of industry experience. She has been with William Blair & Company since 2015. William Blair’s Private Wealth Management division offers discretionary and non-discretionary investment management, financial planning, and wealth services to individuals, foundations, pension, and corporate clients. The firm employs an active, research-driven investment approach across equities, fixed income, and alternative strategies, supporting proprietary models and access to private funds and co-investment opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
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Marco L

Series 66

Boston, MA

William Blair

Marco Larocque is a financial advisor at William Blair with a Series 66 designation and one year of industry experience. Prior to joining William Blair, he worked for nine years at Desjardins Global Asset Management. William Blair’s Private Wealth Management division offers discretionary and non-discretionary investment management, financial planning, and wealth services to individuals, foundations, pension plans, and corporate clients. The firm emphasizes active, research-driven management across various asset classes and provides proprietary model portfolios and access to private funds through specialized programs.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
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Brendan R

Series 66

Boston, MA

William Blair

Brendan Richardson is a financial advisor at William Blair in Boston, MA, holding a Series 66 designation. He has been with William Blair since 2025 and has one year of industry experience. Prior to joining William Blair, he worked at College Hype Screenprint and Embroidery and has additional work experience outside the financial industry. William Blair’s Private Wealth Management division serves individuals, foundations, pension, and corporate clients, offering active, research-driven investment management and financial planning. The firm manages approximately $64 billion in assets and provides access to proprietary investment models, sub-advisory services, and private fund opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
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Barbara C

Series 65, Series 63

Boston, MA

William Blair

Barbara Cummings is a financial advisor at William Blair with Series 65 and Series 63 credentials and 23 years of industry experience. She has been with William Blair & Company since 2015, based in Boston, MA. William Blair’s Private Wealth Management division offers discretionary and non-discretionary investment management, financial planning, and wealth services to individuals, foundations, pension, and corporate clients. The firm employs an active, research-driven approach across equities, fixed income, and alternative strategies, providing proprietary models and access to private funds and co-investment opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
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Carl Y

Series 65, Series 63

Boston, MA

William Blair

Carl Young III is a financial advisor at William Blair in Boston, MA, holding Series 65 and Series 63 licenses with 22 years of industry experience. He has been with William Blair & Company since 2015. William Blair’s Private Wealth Management division offers investment management, financial planning, and wealth services to individuals, foundations, pension, and corporate clients. The firm employs an active, research-driven approach across various asset classes and provides access to proprietary models, third-party sub-managers, and private investment opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
user avatar

Rebecca V

Series 66

Boston, MA

William Blair

Rebecca Vautour is a financial advisor at William Blair with three years of industry experience. She holds the Series 66 designation and has been with William Blair since 2011. William Blair’s Private Wealth Management division offers discretionary and non-discretionary investment management, financial planning, and wealth services to individuals, foundations, pension, and corporate clients. The firm employs an active, research-driven approach across equities, fixed income, and alternative strategies, providing proprietary models and access to private funds and co-investment opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
user avatar

Bradley C

Series 63, Series 65

Boston, MA

William Blair

Bradley Cohen is a financial advisor at William Blair in Boston, MA, with 12 years of industry experience. He holds Series 63 and Series 65 designations and previously worked at Morningstar Investment Services LLC and Putnam Retail Management. William Blair’s Private Wealth Management division offers discretionary and non-discretionary investment management, financial planning, and wealth services to individuals, foundations, pension, and corporate clients. The firm employs active, research-driven strategies across multiple asset classes and provides access to proprietary models, third-party sub-managers, and private investment opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
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James D

Series 63, Series 65

Boston, MA

William Blair

James Devins III is a financial advisor at William Blair with Series 63 and Series 65 credentials and 43 years of industry experience. He has worked at William Blair since 2017 and previously spent 12 years at UBS Financial Services. William Blair’s Private Wealth Management division offers investment management, financial planning, and wealth services to individuals, foundations, pension, and corporate clients. The firm emphasizes active, research-driven strategies across various asset classes and provides access to proprietary models, sub-advisory arrangements, and private investment opportunities.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
user avatar

Trey O

Series 66

Boston, MA

William Blair

Trey Owen is a financial advisor at William Blair with a Series 66 designation and less than one year of industry experience. His background includes multiple roles at Indiana University and experience at other organizations such as Vineyard Vines and Kentucky Country Day School. William Blair’s Private Wealth Management division provides investment management, financial planning, and wealth services to individuals, foundations, pension, and corporate clients. The firm employs an active, research-driven approach across various asset classes and offers proprietary models and access to private funds through its MB Investments Program.

Private / alternative investments Wealth management Active portfolio management ESG / Sustainable investing Retirement plans for business owners (SEP, solo 401k) Founder/Business Owner Executive
View complete list of advisors at this office
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