| # | Company | Employees |
|---|---|---|
| 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. |
84,668 |
| 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. |
46,913 |
| 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 |
37,734 |
| 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. |
13,806 |
| 5 |
John Hancockjohnhancock.com
Providing life insurance, financial planning, and community support services focused on helping customers achieve healthier, longer, and better lives. |
5,048 |
| 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. |
4,070 |
| 7 |
Wellington Managementwellington.com
Independent investment management firm serving diverse clients worldwide with comprehensive capabilities across global equity, fixed income, alternatives, and private markets. |
3,609 |
| 8 |
MFS Investment Managementmfs.com
Global investment manager offering active management, disciplined investing, risk management, serving financial advisors, intermediaries, and institutional clients worldwide. |
2,971 |
| 9 |
Eastern Bankeasternbank.com
Provides banking, wealth management, and investment solutions for consumers and businesses across eastern Massachusetts, New Hampshire, Rhode Island, and Connecticut. |
2,498 |
| 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 |
2,453 |
| 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. |
2,348 |
| 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. |
2,294 |
| 13 |
Plymouth Rock Assuranceplymouthrock.com
Leading Northeast auto and home insurance provider offering unique customer services and career opportunities with a strong, committed team. |
2,263 |
| 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. |
1,990 |
| 15 |
Berkshire Hathaway Specialty Insurancebhspecialty.com
Providing tailored specialty insurance solutions and claims services with strong financial backing, focusing on customer flexibility and satisfaction. |
1,933 |
| 16 |
Risk Strategies Companyus.bbrown.com
Providing custom insurance solutions, consulting, and wealth management with a strategic, holistic approach to protect clients' valuable assets. |
1,921 |
| 17 |
Cambridge Associatescambridgeassociates.com
Global investment firm providing tailored portfolio management and advisory services to institutional clients aiming for outperformance and impact. |
1,886 |
| 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 |
1,883 |
| 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. |
1,503 |
| 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 |
1,443 |
| 21 |
Homesite Insurancego.homesite.com
Offering home, renter, life, small business, condo, and flood insurance with a focus on direct online customer experience. |
1,259 |
| 22 | 1,239 | |
| 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. |
1,097 |
| 24 |
Berkshireberkshireresidentialinvestments.com
A people-focused investment management company specializing in US residential real estate, managing $275 billion in assets for global institutional clients |
1,083 |
| 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. |
1,040 |
| 26 | 1,022 | |
| 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. |
977 |
| 28 |
Amundi Pioneeramundi.com
A financial services company recently rebranded as Amundi US, providing investment management solutions Follow them at their new home |
958 |
| 29 |
Berkshire Bankberkshirebank.com
A relationship-driven bank providing financial expertise in New England and New York, offering tailored banking solutions through various divisions |
936 |
| 30 |
WellSense Health Planwellsense.org
A nonprofit health plan in Massachusetts & New Hampshire providing Medicare, Medicaid, and Individual & Family plans focused on member needs |
926 |
| 31 |
Gordon Brothersgordonbrothers.com
A trusted partner since 1903, providing expertise, operational experience, and capital for valuations, dispositions, operations, and investments worldwide |
922 |
| 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 |
710 |
| 33 |
Safety Insurancesafetyinsurance.com
A property and casualty insurance company prioritizing service and safety for customers through a wide range of insurance products |
610 |
| 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 |
603 |
| 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 |
598 |
| 36 |
Summit Partnerssummitpartners.com
Global investment firm focusing on growth equity, fixed income, and public equity across technology, healthcare, and diverse growth sectors. |
588 |
| 37 | 566 | |
| 38 | 553 | |
| 39 |
Eaton Vanceeatonvance.com
Provides disciplined, long-term investment management and wealth solutions through diverse strategies, serving clients worldwide with innovation and exemplary service. |
546 |
| 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 |
541 |
| 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. |
502 |
| 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 |
456 |
| 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 |
389 |
| 44 |
Berkshire Partnersberkshirepartners.com
Specialist investor focusing on U.S. middle-market companies across services, healthcare, industrials, and technology sectors with growth partnerships. |
288 |
| 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 |
269 |
| 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. |
241 |
| 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. |
237 |
| 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 |
219 |
| 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. |
213 |
| 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 |
204 |
| 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 |
197 |
| 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 |
181 |
| 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 |
129 |
| 54 |
Great Hill Partnersgreathillpartners.com
Private equity firm investing $100M-$750M in high-growth software, financial services, healthcare, consumer, and business services companies. |
118 |
| 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 |
116 |
| 56 |
Breckinridge Capital Advisorsbreckinridge.com
Provides high-quality investment management services to high-net-worth individuals and large institutions through financial advisors and consultants. |
95 |
| 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 |
95 |
| 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 |
90 |
| 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. |
80 |
| 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 |
75 |
| 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 |
68 |
| 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 |
65 |
| 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 |
61 |
| 64 |
Monument Groupmonumentgroup.com
A global full-service capital advisory firm specializing in raising funds for alternative investments, offering capital formation and liquidity solutions |
57 |
| 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. |
54 |
| 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 |
52 |
| 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 |
52 |
| 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 |
49 |
| 69 |
Battery Global Advisorsbga.com
An independent investment manager offering alternative solutions for institutional investors and accredited individuals, with roots tracing back to 2001 |
42 |
| 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 |
40 |
| 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 |
39 |
| 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 |
39 |
| 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 |
36 |
| 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 |
35 |
| 75 |
Tiger Iron Capitaltigerironcapital.com
Passionate institutional fund of funds manager focusing on venture capital, partnering with elite firms to invest in transformational companies |
28 |
| 76 |
K2 HealthVenturesk2hv.com
A healthcare-focused investment firm offering flexible, long-term financing solutions to innovative companies in life sciences and healthcare industries |
26 |
| 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 |
25 |
| 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 |
23 |
| 79 |
COINinvestwithcoin.com
An investing platform backed by John Hancock that allows investors to invest in companies making positive impacts aligned with their values |
22 |
| 80 |
Detwiler Fenton Groupdetwilerfenton.com
This company provides institutional research, trading, investment management, and investment banking services with a focus on knowledge-based investing |
20 |
| 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 |
18 |
| 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 |
18 |
| 83 |
Colchester Partners LLCcolchesterpartners.com
Investment banking and strategic advisory firm specializing in transactions for investment management organizations, including mergers, acquisitions, and ownership restructuring |
18 |
| 84 |
Cormorant Asset Management, LPcormorant-asset.com
Investment management firm in Boston, Massachusetts, specializing in asset management services |
17 |
| 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 |
16 |
| 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 |
16 |
| 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 |
14 |
| 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 |
13 |
| 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 |
12 |
| 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 |
11 |
| 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 |
11 |
| 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 |
11 |
| 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 |
10 |
| 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 |
9 |
| 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 |
8 |
| 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 |
7 |
| 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 |
6 |
| 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 |
6 |
| 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 |
3 |
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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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The same list elsewhere in United States
- Financial services firms in the United States 5,016
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- Financial services firms in Ohio 114
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