| # | Company | Employees |
|---|---|---|
| 1 |
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 |
| 2 |
Xceedancexceedance.com
Provider of strategic operations support, technology, and data services for insurance organizations globally, enhancing efficiencies and optimizing business processes with expertise in underwriting, analytics, and more |
4,963 |
| 3 |
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 |
| 4 |
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 |
| 5 |
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 |
| 6 |
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 |
| 7 |
Homesite Insurancego.homesite.com
Offering home, renter, life, small business, condo, and flood insurance with a focus on direct online customer experience. |
1,259 |
| 8 |
Tufts Health Plantuftshealthplan.com
A health plan company dedicated to guiding and empowering individuals to lead healthier lives |
1,259 |
| 9 |
Fallon Healthfallonhealth.org
A nonprofit health care organization offering coordinated, integrated care for older adults and individuals with complex health needs through various health insurance products and programs |
1,113 |
| 10 |
Arbella Insurance Grouparbella.com
Affordable car, home, and business insurance services in Massachusetts, Connecticut, New Hampshire, and Rhode Island with community focus. |
1,030 |
| 11 |
Harvard Pilgrim Health Careharvardpilgrim.org
A not-for-profit health services company providing health benefit plans, programs, and services to over 3 million customers in New England |
851 |
| 12 |
MIBmibgroup.com
Trusted partner for insurance industry data, insights, and digital solutions improving underwriting, actuarial decision making, and industry efficiencies Visit wwwmibgroupcom |
846 |
| 13 |
Lawleylawleyinsurance.com
A regional insurance firm specializing in property, casualty, and personal insurance, as well as employee benefits and risk management consulting with multiple office locations |
662 |
| 14 |
HealthNow New York Inc.highmark.com
A leading health care company in upstate New York, providing access to quality health care, innovative solutions, and improving outcomes through partnerships |
637 |
| 15 |
Safety Insurancesafetyinsurance.com
A property and casualty insurance company prioritizing service and safety for customers through a wide range of insurance products |
610 |
| 16 |
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 |
| 17 |
One80 Intermediariesone80.com
A leading insurance wholesaler and program manager offering placement services for various insurance markets with offices throughout the US and Canada |
511 |
| 18 |
Neighborhood Health Plannhp.org
NCQA-accredited health plan offering affordable coverage to commercial and MassHealth members, with a focus on health equity and personalized care management |
503 |
| 19 |
Mass General Brigham Health Planmassgeneralbrighamhealthplan.org
A health plan company focused on members' needs, provider connectivity, and continuous improvement with a partnership with Mass General Brigham |
475 |
| 20 |
OneShieldoneshield.com
Provider of business solutions for P&C insurers and MGAs, offering cloud-based platforms for policy management, billing, claims, rating, and analytics |
465 |
| 21 |
Univera Healthcareuniverahealthcare.com
A nonprofit health plan in Buffalo, NY, serving 15 million upstate New Yorkers with financing and delivery of health services Connect on social media |
425 |
| 22 |
Health New Englandhealthnewengland.org
A Springfield-based non-profit health plan offering a variety of healthcare plans in commercial, Medicaid, and Medicare markets, resolving a trademark dispute |
393 |
| 23 |
Boston Mutual Life Insurancebostonmutual.com
A national insurance carrier offering flexible insurance products for working Americans and their families since 1891 Dedicated to serving policyholders, employees, and communities |
389 |
| 24 |
MES Solutionsmessolutions.com
Provider of credentialed physicians for Independent Medical Examinations, Peer Reviews, and Record Reviews in various insurance and government markets |
386 |
| 25 |
Electric Insurance Companyelectricinsurance.com
National insurance provider specializing in auto, home, and liability coverage for individuals and employers, backed by top financial strength and customer service excellence |
380 |
| 26 |
Health Plans, Inc.hpitpa.com
This company partners with health plan brokers and employers to provide innovative self-funding strategies and custom plans for cost transparency and control |
378 |
| 27 |
Openlyopenly.com
The company offers comprehensive insurance through independent agents, ensuring simplicity and transparency without surprises |
374 |
| 28 |
Strategic Risk Solutionsstrategicrisks.com
Leading independent insurance management firm specializing in captive insurance, providing financial reporting, regulatory compliance, underwriting management, and value-added consulting services |
372 |
| 29 |
The Andover Companiesandovercompanies.com
Mutual insurance company providing personal and commercial property coverage, committed to protecting policyholders and supporting local independent agents. |
371 |
| 30 | 353 | |
| 31 |
Globe Life American Income Division: Moore Organizationlinktr.ee
Provider of union-label insurance products and benefits worldwide, offering life and supplemental insurance plans to support hard-working families with protection and peace of mind |
339 |
| 32 |
Wellfleetwellfleetinsurance.com
A provider of customer-centric accident and health insurance products, offering quality service and protection against risk throughout all stages of life |
197 |
| 33 |
ISO Claims Partnersverisk.com
Providing claims compliance services, predictive analytics, and solutions to improve workers' compensation and liability claims management outcomes |
184 |
| 34 |
Norfolk & Dedham Insurancendgroup.com
A group of mutual insurance companies offering protection for homes, autos, and businesses through a network of independent agents since 1825 |
167 |
| 35 |
Quincy Mutual Groupquincymutual.com
Established in 1851, we offer quality home, auto, and commercial insurance products through 500 Independent Agents in New England and New York |
163 |
| 36 |
A.I.M. Mutual Insurance Companiesaimmutual.com
Provider of workers' compensation insurance and services, serving over 18,000 employers in New England with a focus on excellence, innovation, and service-oriented approach |
163 |
| 37 |
Cobalt Benefits Groupcobaltbenefitsgroup.com
A full service Third Party Administrator specializing in custom self-funded employee benefit plans, offering a wide array of services nationwide |
152 |
| 38 |
Enservioenservio.com
A company that blends digital technology with human expertise to provide risk-free solutions for contents claims and offers integrated vehicle lifecycle and fleet management services globally |
150 |
| 39 |
Bearingstar Insurancebearingstar.com
Local insurance agents from Bearingstar, a member of Arbella Insurance Group, provide personalized advice and products to protect individuals, families, and businesses in Massachusetts and Connecticut |
149 |
| 40 |
Globe Life American Income Division: Fisher Organizationfisherdev.com
A New England division specializing in in-home supplemental insurance for Labor and Credit Union members, working families, and various Associations Promoting personal growth and positive impact |
146 |
| 41 |
Disability Management Services, Inc.disabilitymanagementservices.com
Specializing in disability product management, this third-party administrator and consulting firm offers efficient and customized solutions to leading insurers and reinsurers |
102 |
| 42 |
SJL Insurance Servicessjlins.co.uk
UK-based commercial insurance broker offering high-quality services to national and international clients, with expertise in specialist products for various market groups |
79 |
| 43 |
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 |
| 44 |
Energi Insurance Services, Inc.emaxxgroup.com
Specialized insurance and risk management solutions provider serving targeted sectors in the US & Canada with traditional and captive insurance programs |
70 |
| 45 |
Sullivan Insurance Groupsullivangroup.com
Insurance and risk management services provider for individuals and small to mid-sized businesses, offering tailored coverage options and expert counsel since 1957 |
69 |
| 46 |
Corcoran & Havlin Insurance Groupchinsurance.com
An experienced insurance group providing commercial, personal, and employee benefits coverage with a focus on customized solutions and outstanding customer service |
58 |
| 47 |
Provider Groupcrossagency.com
A boutique insurance brokerage offering risk management solutions for businesses and individuals with expertise in Employee Benefits, Private Client Services, and Property & Casualty Insurance |
55 |
| 48 |
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 |
| 49 |
Hazelton Mountford Ltdhazeltonmountford.co.uk
Specializing in business insurance in the UK, we help protect organizations from risks, advise on coverage, and ensure proper protection levels |
48 |
| 50 |
World Insurance Associates - formerly NorthStar Insurance Servicesworldinsurance.com
Leading insurance and risk management provider in New England, offering property and casualty insurance, employee benefits, and risk management solutions with integrity and expertise |
43 |
| 51 |
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 |
| 52 |
Russell Bond & Co., Inc.jencapgroup.com
A national brokerage firm offering industry-specific expertise in insurance solutions for various sectors including agriculture, construction, healthcare, manufacturing, and transportation |
37 |
| 53 |
Webber & Grinnell Insurance, an Alera Group Companywebberandgrinnell.com
Independent insurance agency offering personalized service for personal and business insurance needs Focus on finding best coverage at competitive rates for clients |
30 |
| 54 |
The Driscoll Agency, an affiliate of Cross Insurancedriscollagency.com
An independent insurance agency providing innovative solutions and risk management to businesses and individuals, representing top-tier insurance companies with exceptional service |
30 |
| 55 |
Herlihy Insurance Groupherlihygroup.com
A third-generation independent insurance and financial services agency serving over 7000 clients in Massachusetts, offering customized solutions for individuals and businesses |
29 |
| 56 |
New England Insurance Groupnewenglandins.com
Specializing in insurance and risk management services to protect individuals and businesses from financial losses and potential liabilities |
29 |
| 57 |
International Citizens Insuranceinternationalinsurance.com
Providing a platform for purchasing international health, life, and travel insurance for world travelers, expatriates, and global nomads |
26 |
| 58 |
Promark Partners Insurance Servicespromarkinsurance.com
Specializing in insurance, risk management, and consulting services for individuals, families, businesses, and professionals to provide expert guidance and support |
24 |
| 59 |
Dempsey Insurance Agency Incdemsure.com
Offering well-priced insurance products with high touch personal service for auto, home, business, and life needs Available via phone or email |
10 |
| 60 |
Thomas Gregory Associatesthomasgregory.com
Regional insurance broker specializing in risk management for middle market and national accounts, negotiating difficult exposures for property, casualty, and health & employee benefits |
7 |
| 61 |
Coastline Risk, Inccoastlinerisk.com
Delivering top niche products and value-added services, aiming to become the leading provider of customized specialty insurance solutions for niche industries |
6 |
| 62 |
Acacia Insurance Groupacaciaig.com
A technology-driven insurance group focused on providing quality coverage and personalized service, with a commitment to automation and customer convenience |
5 |
| 63 |
Ocean Employee Benefits Internationaloceanemployeebenefits.com
An insurance brokerage providing group medical, life, disability, and special risk insurance solutions locally and globally, focusing on expatriate and multinational employee groups |
3 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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.
More company lists in Massachusetts
- The largest companies in Massachusetts 3,093
- SaaS companies in Massachusetts 322
- Software Development companies in Massachusetts 245
- Hospitals and Health Care companies in Massachusetts 193
- Financial services firms in Massachusetts 166
- Education providers in Massachusetts 160
- Higher Education companies in Massachusetts 157
- IT Services and IT Consulting companies in Massachusetts 147
- Venture capital and private equity firms in Massachusetts 141
- Financial Services companies in Massachusetts 127
- Manufacturers in Massachusetts 119
- AI companies in Massachusetts 116
- Critical infrastructure operators in Massachusetts 108
- Healthcare providers in Massachusetts 108
- Retail chains in Massachusetts 107
- Venture Capital and Private Equity Principals companies in Massachusetts 107
- Biotechnology Research companies in Massachusetts 97
- IT services companies in Massachusetts 93
- AI-native companies in Massachusetts 88
- Real Estate companies in Massachusetts 82
- Pharmaceutical companies in Massachusetts 82
- Non-profit Organizations companies in Massachusetts 77
- Contract manufacturers in Massachusetts 69
- Energy companies in Massachusetts 69
The same list elsewhere in United States
- Insurance companies in the United States 2,032
- Insurance companies in New York State 232
- Insurance companies in Florida 174
- Insurance companies in California 172
- Insurance companies in Texas 143
- Insurance companies in Illinois 118
- Insurance companies in Pennsylvania 95
- Insurance companies in New Jersey 75
- Insurance companies in Ohio 72
- Insurance companies in Alabama 54
- Insurance companies in Georgia 53
- Insurance companies in Michigan 51
- Insurance companies in North Carolina 49
- Insurance companies in Wisconsin 46
- Insurance companies in Connecticut 41
- Insurance companies in Minnesota 40
- Insurance companies in Missouri 40
- Insurance companies in Indiana 38
- Insurance companies in Arizona 35
- Insurance companies in Iowa 35
- Insurance companies in Virginia 33
- Insurance companies in New York 109
- Insurance companies in Chicago 39
- Insurance companies in Miami 35