| # | Company | Employees |
|---|---|---|
| 1 |
Banner Healthbannerhealth.com
Nonprofit healthcare system operating hospitals, urgent care, clinics, home care, hospice, pharmacies, and physician groups across six states. |
35,542 |
| 2 |
Republic Servicesrepublicservices.com
An industry leader in environmental services, providing innovative solutions for waste management, recycling, and sustainability to create cleaner and more sustainable communities |
21,081 |
| 3 |
Swift Transportationswifttrans.com
Largest full-truckload motor carrier in North America with extensive terminal network offering diverse freight and logistics services. |
10,957 |
| 4 |
HonorHealthhonorhealth.com
Dedicated team of physicians, employees, and volunteers providing quality healthcare services and strengthening communities by going above and beyond |
9,781 |
| 5 |
Cable One/Sparklight Careerssparklight.com
This company provides scalable, reliable business solutions including high-speed internet, phone service, cable TV, and fiber-optic options for success |
7,156 |
| 6 |
Phoenix Children'slinktr.ee
An extensive pediatric health system in Arizona providing world-class inpatient, outpatient, trauma, emergency, and urgent care across 75 specialties |
5,495 |
| 7 |
LifeStance Healthlifestance.com
Behavioral health care company providing evidence-based treatment services for children, adolescents, and adults with mental health issues in various care settings |
5,378 |
| 8 |
Salt River Projectsrpnet.com
Providing essential water and power services to the Phoenix area with a focus on customer satisfaction and innovative technology. |
5,372 |
| 9 |
Western Alliance Bankwesternalliancebancorporation.com
Provides tailored commercial banking and consumer financial products with expert service, operating nationwide through multiple full-service banking brands. |
4,327 |
| 10 |
St. Joseph's Hospital and Medical Centerstjosephs-phx.org
A not-for-profit hospital in Phoenix offering quality medical care, research, education, and specialized services in neurology, cardiology, trauma, and more |
3,297 |
| 11 |
Arizona Public Service - APSaps.com
Arizona's largest and longest serving electric utility, providing power to nearly 12 million customers in 11 counties with a focus on sustainability and customer satisfaction |
3,112 |
| 12 |
Tucson Medical Centertmcaz.com
Locally governed nonprofit hospital offering emergency, pediatric, intensive care, women鈥檚, cardiovascular, orthopaedic, neuroscience, hospice, imaging, and senior services. |
2,808 |
| 13 |
Knight Transportationlinktr.ee
A truckload carrier providing dry van, refrigerated, intermodal, and brokerage services nationwide, offering personalized attention and integrated freight transportation for various industries |
2,775 |
| 14 |
Loginloginbusiness.com
Arizona-based provider of business phone service, internet access, and secure data storage solutions Fully licensed and accredited by AZ ROC |
2,708 |
| 15 |
City of Tucsontucsonaz.gov
City government managing municipal operations, led by elected Mayor and Council, with City Manager executing policies and administration. |
2,489 |
| 16 |
Consumer Cellular, Inc.consumercellular.com
Provides no-contract cellphones and service plans, primarily to individuals aged 50-plus, utilizing a nationwide network and sold at major retailers. |
2,226 |
| 17 |
Arizona Department of Transportationazdot.gov
The company provides highway infrastructure and transportation services, aiming to connect people safely and empower the economy with collaborative and results-focused values |
2,160 |
| 18 |
Mesa Airlines, Inc.mesa-air.com
A regional airline operating for over 35 years, partnering with United Airlines as United Express carrier with hubs across the United States, Canada, and Mexico |
2,148 |
| 19 |
Sagicor Life Insurance Company USAsagicor.com
A highly rated life insurance company focused on helping clients make wise financial decisions for future protection, operating in multiple countries |
2,085 |
| 20 |
City of Mesamesaaz.gov
The organization provides municipal services and recreational opportunities for the residents of Mesa, emphasizing a diverse and inclusive workplace culture |
2,002 |
| 21 |
Vitalantvitalant.org
Leading nonprofit providing safe blood supply, laboratory services, transfusion medicine expertise, and research to hospitals and patients nationwide Relies on donations and volunteers |
1,961 |
| 22 |
Abrazo Healthabrazohealth.com
An Arizona healthcare system with hospitals, specialty institutes, medical groups, and health plans focusing on employee wellness and personalized healthcare |
1,938 |
| 23 |
Centuri Group, Inc.centuri.com
Strategic infrastructure services company partnering with utilities to build, maintain energy networks delivering electricity and natural gas safely and sustainably. |
1,912 |
| 24 |
Cogir Senior Livingcogirusa.com
Drawing on 20 years of experience in senior living and hospitality management, we offer unforgettable French-inspired senior living residences on the West Coast |
1,883 |
| 25 |
Onvida Healthonvidahealth.org
Delivers compassionate innovative care through talented providers and state-of-the-art facilities while supporting local health careers to ensure a healthier future for the community. |
1,809 |
| 26 |
Early Warningearlywarning.com
financial services technology company providing risk management, fraud prevention, and payment solutions to banks, credit unions, and consumers |
1,759 |
| 27 |
Valleywise Healthvalleywisehealth.org
Provider of quality healthcare services in Maricopa County for over 140 years, now operating under the name Valleywise Health Promoting healthier communities through accessible care |
1,728 |
| 28 |
Western Alliance Bancorporationwesternalliancebancorporation.com
A top-performing banking company with $30 billion in assets, offering customized financial services through experienced bankers for businesses nationwide |
1,525 |
| 29 |
City of Scottsdalescottsdaleaz.gov
Providing municipal services and maintenance for desert preserves, urban business districts, and residential neighborhoods within this Arizona desert community for residents. |
1,425 |
| 30 |
Tucson Electric Powertep.com
A leading energy provider in Tucson, delivering safe, reliable power to over 442,000 customers Committed to community service, volunteerism, and economic development |
1,425 |
| 31 |
Arizona Health Care Cost Containment System (AHCCCS)azahcccs.gov
Providing comprehensive Medicaid coverage to over 19 million Arizonans through a managed care system focusing on quality health care and cost reduction |
1,244 |
| 32 |
City of Chandler, Arizonachandleraz.gov
The City of Chandler, Arizona is a vibrant and diverse community, transitioning from an agricultural town to a hub for innovation and technology |
1,204 |
| 33 |
Sparklightsparklight.com
A leading broadband communications provider offering high-speed internet, cable television, phone service, and digital marketing solutions to residential and business customers nationwide |
1,158 |
| 34 |
Carondelet Health Networkcarondelet.org
A network of hospitals and medical centers in Southern Arizona providing high-quality care in various specialties, with a focus on improving patient health |
1,155 |
| 35 |
Kingman Regional Medical Centerazkrmc.com
A leading healthcare system in Kingman, Arizona offering a wide range of services including advanced imaging, cancer treatment, cardiovascular care, and medical education |
1,143 |
| 36 |
Rural/Metro Corporationamr.net
National provider of 911 emergency ambulance, interfacility transport, and community and industrial fire protection services across multiple states. |
1,126 |
| 37 |
Hospice of the Valleyhov.org
Leader in hospice care providing excellence in end-of-life services in central Arizona Innovative programs, quality staff, and inclusive support for patients and families |
1,125 |
| 38 |
Desert Financial Credit Uniondesertfinancial.com
This company is a locally-based credit union in Arizona, focused on providing financial solutions to over 350,000 members and strengthening the local economy |
1,069 |
| 39 |
Gila River Health Caregrhc.org
A healthcare organization within the Gila River Indian Community dedicated to providing high-quality patient care with kindness, dignity, and cultural sensitivity |
979 |
| 40 |
El Rio Community Health Centerelrio.org
A non-profit health center in Tucson providing comprehensive, affordable, and compassionate medical and dental care to over 125,000 patients |
974 |
| 41 |
Maricopa Integrated Health Systemvalleywisehealth.org
A healthcare system in Phoenix, Arizona, dedicated to serving the underserved with Level I Trauma Center, Burn Center, HIV primary care, and family health centers |
957 |
| 42 |
City of Glendale AZglendaleaz.gov
Providing essential information, events and festivals, and a memorable experience in Glendale, Arizona through a variety of services and entertainment options |
928 |
| 43 |
Barrow Neurological Institutebarrowneuro.org
Preserving and protecting thoughts, memories, dreams, personalities, and movement to prioritize what matters most |
918 |
| 44 |
Southwest Behavioral & Health Servicessbhservices.org
The company provides compassionate care and services in behavioral health, focusing on housing, prevention, outpatient services, and treatment of co-occurring disorders |
912 |
| 45 |
Terros Healthterroshealth.org
Health care company specializing in mental health and substance use treatment, providing primary care to help individuals live in recovery and save lives |
905 |
| 46 |
National Bank of Arizonanbarizona.com
This company provides exceptional customer service and builds local relationships by offering financial services through nearly 500 local financial centers |
833 |
| 47 |
Yavapai Regional Medical Centercommonspirit.careers
A not-for-profit healthcare provider offering a wide range of inpatient and outpatient services, including hospitals, clinics, wellness centers, and specialized programs |
824 |
| 48 |
PHI Air Medicalphiairmedical.com
A leading air ambulance provider offering air medical services, outreach education to local communities, and partnering with healthcare systems nationwide |
794 |
| 49 |
Wescom Credit Unionwescom.org
A nonprofit cooperative providing personalized financial services with better rates and benefits for members, supported by innovative technology and friendly service |
678 |
| 50 |
Summit Healthcare Regional Medical Centersummithealthcare.net
A not-for-profit healthcare organization in Northeastern Arizona providing exceptional healthcare close to home for residents in a 3,000 square mile area |
661 |
| 51 |
AdventHealth Medical Groupadventhealth.com
Promoting holistic health by providing compassionate care and world-class expertise to help individuals feel whole in body, mind, and spirit |
580 |
| 52 |
Vantage West Credit Unionvantagewest.org
A $26 billion financial institution in Arizona offering consumer and business banking services online and at branches, including retirement accounts |
572 |
| 53 |
Arevonarevonenergy.com
Development, financing, construction, ownership, and operation of renewable energy projects focusing on solar and energy storage across the U.S. |
319 |
| 54 |
Donor Network of Arizonadnaz.org
The company is a not-for-profit organization in Arizona that promotes organ and tissue donation, facilitates recovery, and supports donor families |
298 |
| 55 |
BANNER DESERT MEDICAL CENTER
A medical devices company located in Mesa, Arizona, specializing in providing innovative healthcare solutions and technologies to Banner Desert Medical Center |
245 |
| 56 |
Cordiacordiaenergy.com
Sustainable energy solutions provider specializing in district energy, combined heat and power, and microgrids for various sectors across the United States |
220 |
| 57 |
Hughes Federal Credit Unionhughesfcu.org
A local, member-owned financial institution providing services to over 175,000 members with a focus on community support and employee investment |
215 |
| 58 |
Crexendo庐 Business Solutionscrexendo.com
This company offers award-winning UCaaS and CCaaS solutions for businesses of all sizes, with a focus on cloud communication and collaboration services |
156 |
| 59 |
Pinnacle West Capital Corporationpinnaclewest.com
Arizona-based energy company providing electricity and energy-related products and services through affiliates, serving over a million customers and operating a major nuclear generating station |
138 |
| 60 |
Tucson Federal Credit Uniontucsonfcu.com
financial cooperative providing banking services, loans, and financial education to community members, employees, students, and families in Pima County |
108 |
| 61 |
Mohave Electric Cooperative, Incmohaveelectric.com
The company specializes in providing electricity services to customers, ensuring reliable and efficient energy delivery for residential and commercial purposes |
79 |
| 62 |
JoyRide Logistics LLCjoyridelogistics.com
Provides logistics and trucking services with a fleet of over 250 trucks and drivers, prioritizing customer satisfaction, diversity, and community support across the Southwest. |
65 |
| 63 |
Richmond Power and Lightrp-l.com
This company is a public electric energy utility providing energy services to the community |
49 |
| 64 |
Casillas Petroleum Corpcasillaspetro.com
A privately held company focused on domestic exploration, development, and production of oil and natural gas with a dedicated team of professionals |
43 |
| 65 |
AERO Financialaerofinancial.com
A financial cooperative providing award-winning products and services for over 60 years, emphasizing member-focused solutions, employee engagement, and community involvement |
37 |
| 66 |
Bank of Tucson a division of Grandpoint Bankbankoftucson.com
A strong and fast-growing bank offering expanded deposit and lending solutions with a wider branch footprint, while maintaining high quality service and local market knowledge |
36 |
| 67 |
SouthWestern Power Groupsouthwesternpower.com
Independent merchant energy generation and transmission development team with projects in Arizona and New Mexico including Bowie Power Station and SunZia Southwest Transmission Project |
16 |
| 68 |
First Credit Unionfirstcredit.pw
A global financial services leader providing personal, business, and institutional banking and wealth management services to millions of customers worldwide |
12 |
| 69 |
Clearway Community Energyclearwaycommunityenergy.com
Comprehensive energy solutions provider specializing in district energy, combined heat and power, and microgrids for a sustainable, resilient energy future |
8 |
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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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