| # | Company | Employees |
|---|---|---|
| 1 |
Coldwell Bankercoldwellbanker.com
Real estate company providing property listings, professional agents, and customer support to assist buyers and sellers throughout transactions. |
100,000 |
| 2 |
Coldwell Banker Realtycoldwellbankerhomes.com
A leading real estate brokerage with 55,000 agents across 50 markets in the US, part of a global brand operated by Anywhere Real Estate Inc |
44,775 |
| 3 |
CENTURY 21®century21.com
Network of over 140,000 real estate agents across 81 countries, providing extensive property services and market expertise worldwide. |
39,788 |
| 4 |
University of Wisconsin-Madisonwisc.edu
A prestigious public university in Madison, offering a wide range of liberal arts studies, professional programs, and student activities on a sprawling campus |
30,836 |
| 5 |
American Family Insuranceamfam.com
Providing insurance products and services with a focus on fairness, integrity, exceptional claims experience, and building long-term customer relationships. |
18,898 |
| 6 |
Anywhere Real Estate Inc.anywhere.re
Leading integrated residential real estate services including franchise, brokerage, relocation, title, mortgage, and technology support for global agents. |
10,320 |
| 7 |
UW Healthuwhealth.org
Integrated academic health system operating multiple hospitals and clinics, providing care to over 832,000 patients annually in Wisconsin and Illinois. |
10,155 |
| 8 |
State of Wisconsinwisc.jobs
The State of Wisconsin Government is an Equal Opportunity Employer with diverse talent, providing professional opportunities in the public sector |
7,738 |
| 9 |
Sotheby's International Realtysothebysrealty.com
Network of independent luxury real estate brokerages providing marketing, referrals, and support to prestigious clientele worldwide. |
7,585 |
| 10 |
Exact Sciencesexactsciences.com
Development of cancer prevention and early detection solutions, guiding personalized treatment to help eradicate cancer and improve patient outcomes. |
5,321 |
| 11 |
Fairway Independent Mortgage Corporationfairwayindependentmc.com
Fairway Independent Mortgage Corporation provides personalized mortgage services nationwide with a focus on fast turn times and exceptional customer service |
4,972 |
| 12 |
Hexagon Asset Lifecycle Intelligencehexagon.com
Empowers customers to design, construct, and operate industrial facilities through data unlocking, digital maturity acceleration, and productivity tools for safer, sustainable global operations. |
4,446 |
| 13 |
TDS®tdsinc.com
Provides broadband internet, TV, phone services, wireless infrastructure leasing, and marketing solutions to urban, suburban, and rural U.S. communities. |
3,980 |
| 14 |
ERA Real Estateera.com
A brand focused on supporting and empowering local agents and brokers in the real estate industry to stay ahead of the game |
3,678 |
| 15 |
Better Homes and Gardens Real Estatebhgre.com
A real estate brand with over 100 years of inspiration and professionalism, helping clients buy and sell homes with passion and excellence |
3,151 |
| 16 |
Madison Metropolitan School Districtmadison.k12.wi.us
A school district serving over 27,000 students in 49 schools, providing education from kindergarten to high school with a focus on college and career readiness |
3,048 |
| 17 |
Octaveoctave.com
Develops software turning operational data into insights for improving asset design, operation, safety, and resilience in critical industries. |
2,991 |
| 18 |
TDS Telecommunications LLCtdstelecom.com
Provides high-speed internet, TV entertainment, phone services, VoIP solutions, and data networking to urban, suburban, and rural communities. |
2,985 |
| 19 |
Madison Area Technical Collegemadisoncollege.edu
A diverse educational institution offering 180+ career programs, transfer options, online classes, and a strong job placement rate, with a focus on community engagement and inclusivity |
2,695 |
| 20 |
Alliant Energyalliantenergy.com
Provides regulated electric and natural gas services to retail customers in Iowa and Wisconsin with focus on sustainability and community. |
2,626 |
| 21 |
TruStagetrustage.com
Financially strong insurance, investment, and technology provider dedicated to helping people make confident financial decisions at every stage of life |
2,538 |
| 22 |
Nordic Globalnordicglobal.com
Strategic partner for healthcare providers offering advisory, managed services, implementation, staffing, and ERP to modernize health IT systems globally. |
2,519 |
| 23 |
UnityPoint Health – Meriterunitypoint.org
UnityPoint Health - Meriter provides high-quality healthcare services, including hospital care, clinics, home health care, laboratories, and community philanthropic activities in Wisconsin |
2,390 |
| 24 |
WPS—A health solutions companywpshealthsolutions.com
A government contractor and insurance industry leader offering affordable health plans, benefits administration, and Medicare services to individuals, businesses, veterans, and military |
2,019 |
| 25 |
Davita Dialysis
Provider of dialysis treatments and support services for patients with chronic kidney failure, also known as end-stage renal disease (ESRD) |
2,011 |
| 26 |
Coldwell Banker Commercialcbcworldwide.com
A global leader in commercial real estate, providing brokerage, relocation, and settlement services through a network of affiliates worldwide |
2,007 |
| 27 |
Promega Corporationpromega.com
Promega Corporation collaborates globally to develop innovative technologies in the life sciences, fostering creativity, sustainability, and meaningful connections with customers |
1,991 |
| 28 |
Wisconsin Department of Natural Resources (DNR)dnr.wisconsin.gov
Preservation, protection, and management of Wisconsin's natural resources, enforcing laws, and providing outdoor recreational opportunities. |
1,956 |
| 29 |
Coldwell Banker Commercialcbcworldwide.com
A global leader in commercial real estate, offering services through a network of affiliates to provide value and opportunities to clients worldwide |
1,873 |
| 30 |
Wisconsin Department of Health Servicesdhs.wisconsin.gov
Protect and promote health and safety of Wisconsin residents through collaboration, innovation, addressing disparities, and responsible resource management. |
1,862 |
| 31 |
City of Madison, WIcityofmadison.com
Provides diverse public sector jobs supporting city residents through various departments, emphasizing customer service, equity, teamwork, and continuous improvement. |
1,840 |
| 32 |
CUNA Mutual Groupcunamutual.com
Financially strong insurance, investment, and financial services company focused on creating a more equitable financial system through community engagement and products |
1,816 |
| 33 |
Sub-Zero Group, Inc.subzero-wolf.com
Family-owned manufacturer producing professional-grade refrigeration, cooking, and dishwashing appliances designed for long-lasting performance, precision craftsmanship, and food preservation in high-end residential kitchens. |
1,775 |
| 34 |
Navitus Health Solutionsnavitus.com
A purpose-driven pharmacy benefit manager focused on reducing costs in the drug supply chain to make medications more affordable |
1,667 |
| 35 |
Wisconsin Department of Transportationwisconsindot.gov
This organization focuses on planning, building, and maintaining transportation networks in Wisconsin, including highways, public transit, air, rail, water, bicycle, and pedestrian facilities |
1,662 |
| 36 |
NRTnrtllc.com
A leading residential real estate brokerage firm with nationally ranked offices offering exceptional service to customers and communities |
1,640 |
| 37 |
Intergraphhexagon.com
A global provider of enterprise engineering software for smarter design and operations in plants, ships, and offshore facilities, alongside mission-critical solutions for governments |
1,623 |
| 38 |
InterVarsity Christian Fellowship/USAintervarsity.org
Engages college students and faculty across U.S. campuses to share the Gospel, build Christian communities, and develop world changers. |
1,614 |
| 39 |
Wisconsin Department of Correctionsdoc.wi.gov
A commitment to public safety and rehabilitation through custody, supervision, and collaboration with community partners in the criminal justice system |
1,613 |
| 40 |
First Weberfirstweber.com
A comprehensive source of real estate information in Wisconsin with 50+ offices and local realtors, offering career opportunities in real estate |
1,554 |
| 41 |
CENTURY 21 Affiliatedc21affiliated.com
A leading real estate organization offering top-notch services, unmatched quality, and innovative solutions to guide clients in making excellent real estate decisions |
1,547 |
| 42 |
UW School of Medicine and Public Healthmed.wisc.edu
Advancing health equity through patient care, education, and research to promote healthy individuals and communities in Madison, WI |
1,472 |
| 43 |
Hexagon Safety, Infrastructure & Geospatialhexagon.com
Global leader in digital reality solutions, leveraging sensor, software, and autonomous technologies to enhance efficiency, productivity, safety across various industries |
1,384 |
| 44 |
University of Wisconsin Hospital and Clinicsuwhealth.org
A prestigious academic medical center with 471 beds, specializing in cancer treatment, pediatrics, ophthalmology, surgical specialties, and organ transplantation |
1,378 |
| 45 |
Wisconsin Army National Guardng.wi.gov
The Wisconsin Army National Guard consists of approximately 7,700 soldiers spread throughout 67 communities in Wisconsin, with both federal and state missions |
1,341 |
| 46 |
WPS Health Insurancewpshealth.com
A leading health insurance provider in Wisconsin offering PPO and HDHP plans, Medicare supplement options, and comprehensive provider networks |
1,274 |
| 47 |
SSM Health St. Mary’s Hospital – Madisonstmarysmadison.com
Medical facility offering comprehensive healthcare services in South Central Wisconsin since 1912, including inpatient, outpatient, and specialty care |
1,201 |
| 48 |
Dean Clinicssmhealth.com
Integrated healthcare organization based in Madison, Wisconsin, providing medical services, health insurance, ancillary services, and eye care across southern Wisconsin |
1,097 |
| 49 | 1,088 | |
| 50 |
Drew Universitydrew.edu
A Phi Beta Kappa liberal arts university offering undergraduate and graduate degrees, dedicated to exceptional faculty mentorship and experiential learning |
1,070 |
| 51 |
Affiliated Engineers, Inc.aeieng.com
Engineering leadership in complex projects for buildings, energy, and utilities, delivering high-performance systems that positively impact society and improve the world |
1,065 |
| 52 |
Accurayaccuray.com
Passionate about advancing radiation therapy to enhance patient outcomes Specializing in CyberKnife, Radixact, and TomoTherapy technologies for improved treatment options |
1,060 |
| 53 |
Stephen Gouldstephengould.com
A leading packaging organization offering design, production, supply chain management, and logistics services with a people-first approach and global reach |
1,004 |
| 54 |
Hood Packaging Corporationhoodpkg.com
A leading manufacturer of packaging materials with 23 production facilities in the US and Canada, specializing in Paper, Plastic, and Woven packaging substrates |
1,002 |
| 55 |
Edgewood Universityedgewood.edu
A college rooted in the Dominican tradition, educating students for ethical leadership, service, and a lifelong search for truth Networking opportunities available |
913 |
| 56 |
Mesa Associates, Incmesainc.com
Full service engineering firm specializing in serving electric utility, industrial, and government clients with expertise in power delivery and various engineering disciplines since 1988 |
882 |
| 57 |
Dakota State Universitydsu.edu
An educational institution offering undergraduate, master's, and doctoral programs with a focus on computing, information technologies, and cybersecurity research and development |
842 |
| 58 |
Wisconsin Department of Workforce Developmentdwd.wisconsin.gov
The organization focuses on workforce development in Wisconsin through job services, training, employment assistance, and supporting employers in filling job openings |
824 |
| 59 |
UW Credit Unionuwcu.org
A financial institution dedicated to putting members first, with a compassionate culture, professional development, and a focus on work-life balance |
812 |
| 60 |
Summit Credit Unionsummitcreditunion.com
Empowering individuals to improve financial well-being through honest advice, building relationships, and providing real solutions as a not-for-profit financial cooperative |
782 |
| 61 |
About Face Modelsaboutfacemodels.com
A nationwide model, talent, and staffing agency hand-selecting top models to meet client needs, delivering maximum brand awareness and exceptional customer service |
779 |
| 62 |
Shopbopshopbop.com
Global online fashion retailer offering curated selection of apparel and accessories from top designers, with daily new arrivals, editorial content, and world-class customer service |
755 |
| 63 |
The Vertex Companygov2x.com
Global aerospace company providing rotary and fixed-wing aircraft maintenance and logistical solutions for government and private sector customers Strong military support and high veteran employee rate |
734 |
| 64 |
Realogyanywhere.re
Realogy's new identity as Anywhere Real Estate Inc emphasizes their evolution towards a modern, flexible approach to real estate services |
729 |
| 65 |
Wisconsin Department of Revenuerevenue.wi.gov
This agency administers various tax laws, assists local governments, estimates state revenues, administers the Wisconsin Lottery, and employs various specialists |
718 |
| 66 |
SunCrest Healthcarelhcgroup.com
SunCrest Healthcare provides Medicare/Medicaid-certified home health care services in the Southern US, focusing on partnerships with local healthcare communities |
688 |
| 67 |
TASC (Total Administrative Services Corporation)tasconline.com
Nationwide administrator of tax-advantaged health benefits plans, offering innovative tools and outstanding service to businesses of all sizes |
668 |
| 68 |
Wisconsin State Public Defenderwispd.gov
The company provides legal representation for low-income individuals throughout Wisconsin's 72 counties, with multiple trial and appellate offices |
655 |
| 69 |
St. John the Baptist Catholic Churchstjohnscatholic.wixsite.com
A Catholic Church in Madison, Alabama, under the Diocese of Birmingham, providing religious services and community support |
654 |
| 70 |
Hexagon Safety & Infrastructurehexagonsafetyinfrastructure.com
Global leader in digital reality solutions, combining sensor, software, and autonomous technologies to boost efficiency, productivity, quality, and safety across various industries |
652 |
| 71 |
Morgan County Charter Schoolsmorgan.k12.ga.us
Specializing in providing innovative solutions and services to clients, One Morgan takes a comprehensive approach to meeting business needs |
651 |
| 72 | 649 | |
| 73 |
Food Manufacturingfoodmanufacturing.com
Provider of food industry news, including recalls, safety, quality control, operational trends, maintenance practices, and product information for purchasing decisions |
643 |
| 74 |
Facultefaculte.com
The company specializes in simplifying and enhancing communication for e-learning, marketing, sales, online training, and business communications through user-friendly platforms |
642 |
| 75 |
University of Wisconsin-Extensionextension.wisc.edu
Statewide access to university resources for lifelong learning and success, including continuing education, cooperative extension, business support, and media innovations |
642 |
| 76 |
DeliverHealthai.deliverhealth.com
A software and technology company specializing in revenue cycle management, clinical documentation, and digital health solutions to reduce burdens and improve care |
634 |
| 77 |
Grote Industriesgrote.com
A leading manufacturer supplying lighting products and safety systems for heavy duty vehicles, industries, and military applications worldwide |
612 |
| 78 |
Findorfffindorff.com
A trusted construction company with over 130 years of experience, dedicated to serving clients, employees, and the community through top-quality craftsmanship and services |
600 |
| 79 |
Wisconsin Early Autism Projectwiautism.com
A world-renowned leader in early behavioral treatment for children with autism, offering one-on-one therapy to help them communicate, play, and live more independently |
590 |
| 80 |
Madison Gas and Electricmge.com
Regulated natural gas and electric utility serving Dane County and surrounding areas, committed to providing energy to the community since 1855 |
579 |
| 81 |
M3 Insurancem3ins.com
A leading insurance broker and risk management firm in America, providing world-class resources for managing risk, purchasing insurance, and offering employee benefits |
567 |
| 82 |
SVA | A Professional Services Companysva.com
A highly diversified professional services provider offering expert consulting and certified public accounting services to help clients achieve their individual and business goals |
560 |
| 83 |
Wisconsin Foundation and Alumni Associationuwalumni.com
Connecting UW-Madison alumni, the company enriches lives, advances the university, and provides opportunities for talented individuals in various departments |
560 |
| 84 |
Wisconsin Department of Public Instructiondpi.wi.gov
A state agency in Wisconsin that supports public schools, libraries, and students through services like education support, budgeting, and information technology |
544 |
| 85 |
AprilAireaprilaire.com
A Wisconsin-based company providing Indoor Air Quality solutions since 1938, specializing in humidifiers, air cleaners, dehumidifiers, thermostats, ventilation, and comfort control systems |
538 |
| 86 |
Gordon Flesch Companygflesch.com
Office technology solutions provider specializing in integrating business applications and multifunction devices to boost productivity, reduce waste, save money, and support various industries and communities |
525 |
| 87 |
Group Health Cooperative of South Central Wisconsinghcscw.com
Not-for-profit organization providing insurance, primary care, specialty care, and integrated health services through nationally-ranked clinics and networks. |
516 |
| 88 |
Wisconsin School of Businessbusiness.wisc.edu
A prestigious institution offering a wide range of business education programs, including precollege, undergraduate, master's, MBA, and professional development |
513 |
| 89 |
Recreation & Wellbeing at the University of Wisconsin-Madisonrecwell.wisc.edu
This company promotes fitness, wellbeing, and community through inclusive and innovative initiatives for students, encouraging healthy habits and active living |
510 |
| 90 |
First Supply LLCfirstsupply.com
Main channel distributor providing industrial customers and building contractors with a diverse range of products and services in plumbing, heating, air conditioning, and more |
508 |
| 91 | 499 | |
| 92 |
Agraceagrace.org
A nationally recognized nonprofit providing hospice care, supportive services, adult day care, senior care, and grief support in southern Wisconsin |
498 |
| 93 |
First Business Bankfirstbusiness.bank
A company offering business banking, private wealth management, bank consulting services, and total rewards for employees, committed to supporting communities |
485 |
| 94 |
RE/MAX Preferredlinktr.ee
A real estate company in Greater Madison prioritizes client needs by providing excellent service through integrity, market knowledge, and advanced technology |
478 |
| 95 |
Universities of Wisconsinwisconsin.edu
A coalition of 13 universities in Wisconsin working together towards a shared goal of preparing the state for the future |
468 |
| 96 |
Mad City Windows & Bathsmadcitywindows.com
A family-owned business since 1998, dedicated to providing high-quality workmanship and excellent customer service for windows and doors |
465 |
| 97 |
Wisconsin Athleticsuwbadgers.com
The Division of Intercollegiate Athletics at a university in Wisconsin offers student-athletes opportunities for athletic, academic, and social development while prioritizing integrity and accountability |
462 |
| 98 |
Wisconsin Unionunion.wisc.edu
Provides recreational, cultural, educational, and social opportunities for students, faculty, staff, and guests at two campus locations. |
457 |
| 99 |
Strand Associates, Inc.®strand.com
Provides consulting engineering services including municipal, wastewater, water, transportation, and structural, focusing on infrastructure design and sustainable solutions for public and private sectors. |
454 |
| 100 |
Great Lakes Higher Education Corporation and Affiliatesmygreatlakes.org
Provider of support in higher education, simplifying financial aid processes and making college affordability a reality Mission-driven, caring for students and employees |
442 |
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.
The same list elsewhere in United States
- The largest companies in the United States 91,669
- The largest companies in California 12,813
- The largest companies in New York State 10,485
- The largest companies in Texas 8,086
- The largest companies in Florida 4,945
- The largest companies in Illinois 4,175
- The largest companies in Pennsylvania 3,110
- The largest companies in Massachusetts 3,093
- The largest companies in Georgia 2,632
- The largest companies in Ohio 2,618
- The largest companies in New Jersey 2,569
- The largest companies in Virginia 2,503
- The largest companies in Michigan 2,346
- The largest companies in North Carolina 2,174
- The largest companies in Alabama 1,806
- The largest companies in Washington State 1,785
- The largest companies in Colorado 1,774
- The largest companies in Minnesota 1,700
- The largest companies in Maryland 1,527
- The largest companies in Wisconsin 1,482
- The largest companies in New York 6,920
- The largest companies in San Francisco 2,030
- The largest companies in Houston 1,791
- The largest companies in Chicago 1,668