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List of financial services firms in Boston

Tamtam tracks 99 financial services firms headquartered in Boston. This list ranks all of them by number of employees on LinkedIn, led by Fidelity Investments, State Street and Liberty Mutual Insurance. Their median headcount is 204. Half of them were founded in 1987 or later.

馃嚭馃嚫 Boston99 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Fidelity Investmentsfidelity.com

Financial well-being through diversified market-leading services for individuals, families, employers, wealth management firms, and institutions using trillions in administered and discretionary assets.

Financial Services 馃嚭馃嚫 Boston 84,668 1946
2
State Streetstatestreet.com

Global financial leader providing comprehensive investment services, institutional asset management, multi-asset trading, and digital solutions to enhance portfolio performance and decision making.

Financial Services 馃嚭馃嚫 Boston 46,913 1792
3
Liberty Mutual Insurancelibertymutualgroup.com

Global leader in property and casualty insurance dedicated to fostering career growth, social responsibility, sustainability, diversity, and innovative solutions for customers worldwide

Insurance 馃嚭馃嚫 Boston 37,734 1912
4
Santander USsantanderus.com

Provides auto, retail, commercial, and investment banking services alongside wealth management for millions of customers across various US hubs and global markets.

Financial Services 馃嚭馃嚫 Boston 13,806 1857
5
John Hancockjohnhancock.com

Providing life insurance, financial planning, and community support services focused on helping customers achieve healthier, longer, and better lives.

Financial Services 馃嚭馃嚫 Boston 5,048 n/a
6
Blue Cross Blue Shield of Massachusettsbluecrossma.org

Provides health insurance coverage to over 3 million members, focusing on community wellness, inclusivity, and employee development in Massachusetts.

Hospitals and Health Care 馃嚭馃嚫 Boston 4,070 1937
7
Wellington Managementwellington.com

Independent investment management firm serving diverse clients worldwide with comprehensive capabilities across global equity, fixed income, alternatives, and private markets.

Investment Management 馃嚭馃嚫 Boston 3,609 1933
8
MFS Investment Managementmfs.com

Global investment manager offering active management, disciplined investing, risk management, serving financial advisors, intermediaries, and institutional clients worldwide.

Investment Management 馃嚭馃嚫 Boston 2,971 1924
9
Eastern Bankeasternbank.com

Provides banking, wealth management, and investment solutions for consumers and businesses across eastern Massachusetts, New Hampshire, Rhode Island, and Connecticut.

Banking 馃嚭馃嚫 Boston 2,498 1818
10
Columbia Threadneedle Investmentscolumbiathreadneedle.com

Global investment firm offering diverse expertise, sustainable investment decisions, and continuous improvement to manage over $637 billion for a better future

Financial Services 馃嚭馃嚫 Boston 2,453 n/a
11
State Street Investment Managementstatestreet.com

Delivers global investment solutions, managing diverse institutional assets through indexing and ETFs while providing cost-effective strategies for intermediaries and investors across sixty countries.

Financial Services 馃嚭馃嚫 Boston 2,348 n/a
12
Bain Capitalbaincapital.com

Global investment firm managing assets across private equity, credit, public equity, venture capital, and real estate to create impact for diverse stakeholders.

Financial Services 馃嚭馃嚫 Boston 2,294 1984
13
Plymouth Rock Assuranceplymouthrock.com

Leading Northeast auto and home insurance provider offering unique customer services and career opportunities with a strong, committed team.

Insurance 馃嚭馃嚫 Boston 2,263 1983
14
Natixis Investment Managersnatixis.com

Multi-affiliate asset management firm providing diverse investment solutions, active management expertise, and sustainable ESG strategies to global clients for long-term financial goals.

Financial Services 馃嚭馃嚫 Boston 1,990 n/a
15
Berkshire Hathaway Specialty Insurancebhspecialty.com

Providing tailored specialty insurance solutions and claims services with strong financial backing, focusing on customer flexibility and satisfaction.

Insurance 馃嚭馃嚫 Boston 1,933 n/a
16
Risk Strategies Companyus.bbrown.com

Providing custom insurance solutions, consulting, and wealth management with a strategic, holistic approach to protect clients' valuable assets.

Insurance 馃嚭馃嚫 Boston 1,921 1997
17
Cambridge Associatescambridgeassociates.com

Global investment firm providing tailored portfolio management and advisory services to institutional clients aiming for outperformance and impact.

Financial Services 馃嚭馃嚫 Boston 1,886 1973
18
Comparion Insurance Agencycomparioninsurance.com

This company offers flexible insurance solutions from Liberty Mutual and other providers through knowledgeable agents who assist customers in finding the right coverage

Insurance 馃嚭馃嚫 Boston 1,883 2022
19
Commonwealth Care Alliancecommonwealthcarealliance.org

Mission-driven healthcare organization providing integrated, person-centered care and innovative health plans for individuals with significant needs in Massachusetts.

Hospitals and Health Care 馃嚭馃嚫 Boston 1,503 2003
20
HarbourVest Partnersharbourvest.com

An independent global private markets firm with over 40 years of experience managing $117 billion in assets, offering diverse investment opportunities worldwide

Venture Capital and Private Equity Principals 馃嚭馃嚫 Boston 1,443 1982
21
Homesite Insurancego.homesite.com

Offering home, renter, life, small business, condo, and flood insurance with a focus on direct online customer experience.

Insurance 馃嚭馃嚫 Boston 1,259 1997
22
AEWaew.com

Real estate investment management services with over 40 years experience, managing diverse portfolios across public and private property markets worldwide.

Real Estate 馃嚭馃嚫 Boston 1,239 1981
23
Loomis, Sayles & Companyloomissayles.com

Investment management firm providing institutional and mutual fund clients worldwide with research-driven, risk-aware, value-focused portfolio solutions across asset classes.

Financial Services 馃嚭馃嚫 Boston 1,097 1926
24
Berkshireberkshireresidentialinvestments.com

A people-focused investment management company specializing in US residential real estate, managing $275 billion in assets for global institutional clients

Real Estate 馃嚭馃嚫 Boston 1,083 1966
25
Santander USsantanderus.com

Diversified financial business providing retail banking, commercial loans, consumer finance, private wealth management, and investment banking services across the United States for millions.

Financial Services 馃嚭馃嚫 Boston 1,040 n/a
26
GMOgmo.com

GMO partners with institutions, intermediaries, and families to provide investment expertise tailored to their goals and missions worldwide

Investment Management 馃嚭馃嚫 Boston 1,022 1977
27
Putnam Investmentsputnam.com

Global asset management firm providing diversified equity-only investment strategies to clients and investors worldwide as a subsidiary of Franklin Templeton since 1937.

Financial Services 馃嚭馃嚫 Boston 977 1937
28
Amundi Pioneeramundi.com

A financial services company recently rebranded as Amundi US, providing investment management solutions Follow them at their new home

Financial Services 馃嚭馃嚫 Boston 958 n/a
29
Berkshire Bankberkshirebank.com

A relationship-driven bank providing financial expertise in New England and New York, offering tailored banking solutions through various divisions

Banking 馃嚭馃嚫 Boston 936 1846
30
WellSense Health Planwellsense.org

A nonprofit health plan in Massachusetts & New Hampshire providing Medicare, Medicaid, and Individual & Family plans focused on member needs

Hospitals and Health Care 馃嚭馃嚫 Boston 926 n/a
31
Gordon Brothersgordonbrothers.com

A trusted partner since 1903, providing expertise, operational experience, and capital for valuations, dispositions, operations, and investments worldwide

Financial Services 馃嚭馃嚫 Boston 922 1903
32
NACA - Neighborhood Assistance Corporation of Americanaca.com

A non-profit organization advocating for economic justice through home ownership, offering affordable mortgage options and assistance with loan modifications

Non-profit Organizations 馃嚭馃嚫 Boston 710 1988
33
Safety Insurancesafetyinsurance.com

A property and casualty insurance company prioritizing service and safety for customers through a wide range of insurance products

Insurance 馃嚭馃嚫 Boston 610 1979
34
Coveryscoverys.com

A company specializing in medical professional liability insurance, data analytics, and risk mitigation resources to help healthcare providers improve outcomes and focus on patients

Insurance 馃嚭馃嚫 Boston 603 1975
35
Amundi USamundi.com

A global asset manager offering investment solutions in fixed-income, equity, and multi-asset, with a focus on responsible investing and client partnerships worldwide

Financial Services 馃嚭馃嚫 Boston 598 n/a
36
Summit Partnerssummitpartners.com

Global investment firm focusing on growth equity, fixed income, and public equity across technology, healthcare, and diverse growth sectors.

Venture Capital and Private Equity Principals 馃嚭馃嚫 Boston 588 1984
37
GIDgid.com

A leading real estate investment and management firm with a diverse portfolio of multifamily, industrial, and mixed-use developments across the US

Real Estate 馃嚭馃嚫 Boston 566 1960
38
NEPC, LLCnepc.com

Full-service investment consulting firm, serving clients with asset advisement. Helps governments, institutions, families, and individuals preserve and grow capital across different asset classes and market cycles.

Financial Services 馃嚭馃嚫 Boston 553 1986
39
Eaton Vanceeatonvance.com

Provides disciplined, long-term investment management and wealth solutions through diverse strategies, serving clients worldwide with innovation and exemplary service.

Investment Management 馃嚭馃嚫 Boston 546 1924
40
Arrowstreet Capital, Limited Partnershiparrowstreetcapital.com

An independent quantitative investment firm based in Boston, specializing in systematic investment processes utilizing research, technology, and collaboration to deliver sustainable performance

Financial Services 馃嚭馃嚫 Boston 541 1999
41
Manulife John Hancock Investments

Building a broad network of unaffiliated asset managers, backed by rigorous investment oversight, designing specialized investment strategies for better client portfolio outcomes.

Financial Services 馃嚭馃嚫 Boston 502 1969
42
Acadian Asset Managementacadian-asset.com

Global investment manager applying fundamental insights and systematic approach to find attractive opportunities across various strategies, using data-driven techniques for decision-making

Financial Services 馃嚭馃嚫 Boston 456 1986
43
Lendbuzzlendbuzz.com

An AI auto finance platform using alternative data and machine-learning to provide fair credit access for car purchases to underserved consumers and support dealership growth

Financial Services 馃嚭馃嚫 Boston 389 2015
44
Berkshire Partnersberkshirepartners.com

Specialist investor focusing on U.S. middle-market companies across services, healthcare, industrials, and technology sectors with growth partnerships.

Financial Services 馃嚭馃嚫 Boston 288 1986
45
SCSscsfinancial.com

An investment and wealth management firm based in Boston, serving families, family offices, and institutional investors, managing approximately $30 billion in assets

Financial Services 馃嚭馃嚫 Boston 269 2002
46
Income Research + Managementincomeresearch.com

Privately owned independent firm providing fixed income investment management through security selection and risk management for institutional and private clients via boutique service.

Investment Management 馃嚭馃嚫 Boston 241 1987
47
Geode Capital Managementgeodecapital.com

Boston based investment firm managing over one trillion dollars through systematic core beta exposures across equity and niche asset classes for global clients.

Investment Management 馃嚭馃嚫 Boston 237 2001
48
Moors & Cabotmoorscabot.com

Established in 1890, the company provides financial services including retail and institutional sales of stocks and bonds, wealth management, and investment tools

Financial Services 馃嚭馃嚫 Boston 219 1890
49
Charlesbank Capital Partnerscharlesbank.com

Middle-market private investment firm specializing in management-led buyouts, growth capital, opportunistic credit, and technology investments with flexible structures.

Financial Services 馃嚭馃嚫 Boston 213 1998
50
THL Partnersthl.com

Boston-based private equity firm investing in middle-market growth companies in Financial Technology & Services, Healthcare, and Technology & Business Solutions Expertise in generating superior returns

Financial Services 馃嚭馃嚫 Boston 204 1974
51
GW&K Investment Managementgwkinvest.com

A Boston-based investment management firm founded in 1974, offering active equity and fixed income solutions through fundamental research and consistent investment strategies

Financial Services 馃嚭馃嚫 Boston 197 1974
52
Bracebridge Capital, LLCbracebridgecapital.com

A leading hedge fund manager with $12 billion in assets under management, specializing in global fixed income strategies for institutional investors

Financial Services 馃嚭馃嚫 Boston 181 1994
53
eSecLendingeseclending.com

Independent securities lending agent providing tailored solutions for higher returns, transparency, and alignment of interests compared to traditional programs Focus on best execution and price transparency

Financial Services 馃嚭馃嚫 Boston 129 2000
54
Great Hill Partnersgreathillpartners.com

Private equity firm investing $100M-$750M in high-growth software, financial services, healthcare, consumer, and business services companies.

Financial Services 馃嚭馃嚫 Boston 118 1998
55
Mellon Capitalmellon.com

A specialist multi-asset investment management firm dedicated to serving sophisticated investors, offering a range of capabilities under the brand Mellon

Investment Management 馃嚭馃嚫 Boston 116 n/a
56
Breckinridge Capital Advisorsbreckinridge.com

Provides high-quality investment management services to high-net-worth individuals and large institutions through financial advisors and consultants.

Investment Management 馃嚭馃嚫 Boston 95 1993
57
HighVista Strategieshighvistastrategies.com

Employee-owned alternative asset manager in Boston since 2004, managing $10 billion globally Specializing in structurally inefficient markets for high-conviction investment opportunities

Investment Management 馃嚭馃嚫 Boston 95 2004
58
Eventide Asset Managementeventideinvestments.com

A pioneering asset management firm focused on values-based investing through a biblical worldview, seeking to advance the global common good

Investment Management 馃嚭馃嚫 Boston 90 2008
59
Trillium Asset Managementtrilliuminvest.com

Provides ESG-focused investment strategies and services, integrating values with active ownership to deliver long-term value and positive social impact.

Investment Management 馃嚭馃嚫 Boston 80 1982
60
Massachusetts Property Insurance Underwriting Associationmpiua.com

A residual market insurance association in Massachusetts providing fair access to insurance for high-risk properties through shared losses among member companies

Insurance 馃嚭馃嚫 Boston 75 n/a
61
Signator Investors, Inc.signatorinvestors.com

A leader in financial services industry, empowering independent financial professionals nationwide with innovative business models and unique growth opportunities

Financial Services 馃嚭馃嚫 Boston 68 n/a
62
Welch & Forbes LLCwelchforbes.com

A full-service wealth management firm with over 180 years of experience, offering customized financial solutions, investment management, trust services, and personalized planning

Investment Management 馃嚭馃嚫 Boston 65 1838
63
The Boston Company Asset Managementmellon.com

A multi-asset asset management firm based in Boston, now operating as Mellon, providing investment services and capabilities through Mellon Investments Corporation

Financial Services 馃嚭馃嚫 Boston 61 n/a
64
Monument Groupmonumentgroup.com

A global full-service capital advisory firm specializing in raising funds for alternative investments, offering capital formation and liquidity solutions

Financial Services 馃嚭馃嚫 Boston 57 1994
65
Boston Common Asset Managementbostoncommonasset.com

Active global equity investor focused on sustainable investing, women-led, employee-owned, and leader in shareholder engagement since 2003.

Investment Management 馃嚭馃嚫 Boston 54 2003
66
IGP - International Group Programigpinfo.com

IGP is a global network of life insurance companies offering employee benefits solutions worldwide with a focus on quality service

Insurance 馃嚭馃嚫 Boston 52 1967
67
Longfellow Investment Managementlongfellowim.com

Employee-owned investment management firm specializing in domestic fixed income, equity, and alternative strategies Focus on minimizing portfolio volatility for attractive long-term returns

Investment Management 馃嚭馃嚫 Boston 52 1986
68
Anchor Capital Advisors LLCanchorcapital.com

A financial company focused on building and preserving wealth for clients through value investing, risk management, and providing customized client service

Investment Management 馃嚭馃嚫 Boston 49 1983
69
Battery Global Advisorsbga.com

An independent investment manager offering alternative solutions for institutional investors and accredited individuals, with roots tracing back to 2001

Investment Management 馃嚭馃嚫 Boston 42 2005
70
Woodstock Corporationwoodstockcorp.com

A Boston-based wealth management firm offering personalized portfolio management, financial counseling, trust services, and investment services to high-net-worth individuals and organizations

Financial Services 馃嚭馃嚫 Boston 40 1929
71
Cleary Insurance, Inc.clearyinsurance.com

A full service insurance agency providing expert advice and tailored coverage options, with a focus on hiring experienced professionals for client benefit

Insurance 馃嚭馃嚫 Boston 39 n/a
72
Merganser Capital Managementmerganser.com

An SEC-registered investment adviser founded in 1985, specializing in meeting the fixed income needs of institutional clients through fundamental analysis and risk management

Investment Management 馃嚭馃嚫 Boston 39 1985
73
Shepherd Kaplan Krochuk, LLCskk-llc.com

Wealth management company offering a wide range of services for individuals, family offices, and institutions, including alternative asset investment capabilities

Financial Services 馃嚭馃嚫 Boston 36 2001
74
Howland Capitalhowlandcapital.com

Independent wealth management firm offering tailored investment solutions for individuals, families, and institutions with a commitment to providing prudent and personal counsel

Investment Management 馃嚭馃嚫 Boston 35 1967
75
Tiger Iron Capitaltigerironcapital.com

Passionate institutional fund of funds manager focusing on venture capital, partnering with elite firms to invest in transformational companies

Investment Management 馃嚭馃嚫 Boston 28 2016
76
K2 HealthVenturesk2hv.com

A healthcare-focused investment firm offering flexible, long-term financing solutions to innovative companies in life sciences and healthcare industries

Venture Capital and Private Equity Principals 馃嚭馃嚫 Boston 26 2018
77
WestView Capital Partnerswvcapital.com

Private equity firm in Boston that focuses on lower middle market companies, providing equity investments tailored to shareholders' needs for various transactions

Venture Capital and Private Equity Principals 馃嚭馃嚫 Boston 25 2004
78
1251 Capital Group, Inc.1251capital.com

Financial services holding company specializing in asset management and insurance sectors, providing long-term strategic resources to accelerate growth and maximize profitability

Financial Services 馃嚭馃嚫 Boston 23 n/a
79
COINinvestwithcoin.com

An investing platform backed by John Hancock that allows investors to invest in companies making positive impacts aligned with their values

Financial Services 馃嚭馃嚫 Boston 22 2016
80
Detwiler Fenton Groupdetwilerfenton.com

This company provides institutional research, trading, investment management, and investment banking services with a focus on knowledge-based investing

Financial Services 馃嚭馃嚫 Boston 20 1962
81
Birch Hill Investment Advisors LLCbhboston.com

Independent registered investment advisor providing wealth management services for individuals, families, trusts, and institutions with a clear, straightforward investment approach and a focus on client-specific objectives

Investment Management 馃嚭馃嚫 Boston 18 2007
82
Zevin Asset Managementzevin.com

This socially responsible asset management company offers global, diversified portfolios and strategies aligned with clients' values, emphasizing sustainability and shareholder advocacy

Investment Management 馃嚭馃嚫 Boston 18 1997
83
Colchester Partners LLCcolchesterpartners.com

Investment banking and strategic advisory firm specializing in transactions for investment management organizations, including mergers, acquisitions, and ownership restructuring

Investment Banking 馃嚭馃嚫 Boston 18 2002
84
Cormorant Asset Management, LPcormorant-asset.com

Investment management firm in Boston, Massachusetts, specializing in asset management services

Investment Management 馃嚭馃嚫 Boston 17 2013
85
Penobscot Investment Management Company, Inc.pimboston.com

This company offers investment management services to individuals, families, and non-profits, focusing on sound financial advice and effective communication with clients

Investment Management 馃嚭馃嚫 Boston 16 1988
86
Verdad Advisersverdadcap.com

A global asset management firm prioritizing intellectual integrity through research to provide investors with high risk-adjusted returns across asset classes

Investment Management 馃嚭馃嚫 Boston 16 2014
87
Clough Capitalcloughcapital.com

Global alternative asset management firm founded by Chuck Clough, focusing on developing proprietary insights for better client outcomes and unique investment solutions

Investment Management 馃嚭馃嚫 Boston 14 1999
88
ShawSpring Partnersshawspring.com

A company pursuing long-term investments in technology, internet, and consumer sectors with a focus on industry leaders and high-growth businesses

Investment Management 馃嚭馃嚫 Boston 13 2014
89
BrightSphere Investment Groupacadian-inc.com

Global asset management holding company providing institutional investors with access to quantitative and solutions-based strategies to meet diverse risk and return objectives

Financial Services 馃嚭馃嚫 Boston 12 n/a
90
C.W. Downer & Co.alantra.com

Global mid-market specialist offering corporate finance, asset management, and M&A advisory services in 19 countries, with a strong US growth strategy

Investment Banking 馃嚭馃嚫 Boston 11 2016
91
Siharum Advisors, LLCsiharum.com

An independent investment advisory firm serving high net worth individuals and foundations, focusing on selecting top investment managers and tailor-made portfolios

Financial Services 馃嚭馃嚫 Boston 11 2008
92
Delta Partners, LPdeltamgt.com

An investment firm specializing in global equity funds, using a fundamental, bottom-up approach to diversify investments and generate returns

Investment Management 馃嚭馃嚫 Boston 11 n/a
93
GRT Capital Partners, LLCgrtcapital.com

A company specializing in active equity management, combining fundamental research, quantitative analysis, and experienced team members dedicated to client service

Investment Management 馃嚭馃嚫 Boston 10 2001
94
Shepherd Kaplan LLCsk-llc.com

Wealth management division providing consulting, investment management, and alternative asset investment services for individuals, family offices, and institutions Privately-held, client-focused firm

Financial Services 馃嚭馃嚫 Boston 9 1998
95
Windhaven Investment Management, Inc.schwabassetmanagement.com

SEC-registered investment advisory firm diversifying portfolios for high net worth clients with global market exposure and proprietary risk management model

Investment Management 馃嚭馃嚫 Boston 8 1994
96
Sconset Wealth Managementsconsetwealth.nm.com

The company offers innovative insurance services and investment products, assisting clients in identifying financial goals and providing solutions to reach them

Financial Services 馃嚭馃嚫 Boston 7 2019
97
South Shore Capital Advisorssscainvest.com

A global investment firm seeking opportunities worldwide to build diversified portfolios and reduce risk through a global balanced approach

Investment Management 馃嚭馃嚫 Boston 6 2006
98
NEW EICneweicgroup.com

Boston-based asset management firm with a branch in China specializing in quantitative investments and financial consulting to help clients reach their financial goals

Financial Services 馃嚭馃嚫 Boston 6 2023
99
MPC Insurance & Financial Servicesmpc-ifs.com

This company offers tools to secure and enhance financial strength, with access to various financial institutions to tailor strategies for clients' specific objectives

Financial Services 馃嚭馃嚫 Boston 3 n/a

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.

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