Critical infrastructure operators headquartered in Phoenix (2026 list)

This selection of companies in Phoenix primarily comprises large firms, many of which are well-established. The dominant industries are healthcare and transportation. For example, Banner Health is a nonprofit healthcare system operating hospitals and clinics across six states, while Swift Transportation is a large full-truckload motor carrier. Other notable companies include Cable One/Sparklight Careers, providing telecommunications solutions, and Western Alliance Bank, which offers commercial banking and consumer financial products.

A clear pattern is the strong presence of healthcare providers, with several large hospitals and health systems like Phoenix Children's, St. Joseph's Hospital and Medical Center, and Abrazo Health, all based in Phoenix. This indicates a significant concentration of critical healthcare infrastructure in the city.

#	Company	Industry	Headquarters	Employees	Founded
1	Banner Health bannerhealth.com Nonprofit healthcare system operating hospitals, urgent care, clinics, home care, hospice, pharmacies, and physician groups across six states.	Hospitals and Health Care	🇺🇸 Phoenix	35,542	1999
2	Swift Transportation swifttrans.com Largest full-truckload motor carrier in North America with extensive terminal network offering diverse freight and logistics services.	Truck Transportation	🇺🇸 Phoenix	10,957	1966
3	Cable One/Sparklight Careers sparklight.com This company provides scalable, reliable business solutions including high-speed internet, phone service, cable TV, and fiber-optic options for success	Telecommunications	🇺🇸 Phoenix	7,156	1983
4	Phoenix Children's linktr.ee An extensive pediatric health system in Arizona providing world-class inpatient, outpatient, trauma, emergency, and urgent care across 75 specialties	Hospitals and Health Care	🇺🇸 Phoenix	5,495	1983
5	Western Alliance Bank westernalliancebancorporation.com Provides tailored commercial banking and consumer financial products with expert service, operating nationwide through multiple full-service banking brands.	Banking	🇺🇸 Phoenix	4,327	n/a
6	St. Joseph's Hospital and Medical Center stjosephs-phx.org A not-for-profit hospital in Phoenix offering quality medical care, research, education, and specialized services in neurology, cardiology, trauma, and more	Hospitals and Health Care	🇺🇸 Phoenix	3,297	1895
7	Arizona Public Service - APS aps.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	Utilities	🇺🇸 Phoenix	3,112	1886
8	Knight Transportation linktr.ee A truckload carrier providing dry van, refrigerated, intermodal, and brokerage services nationwide, offering personalized attention and integrated freight transportation for various industries	Truck Transportation	🇺🇸 Phoenix	2,775	1990
9	Arizona Department of Transportation azdot.gov The company provides highway infrastructure and transportation services, aiming to connect people safely and empower the economy with collaborative and results-focused values	Government Administration	🇺🇸 Phoenix	2,160	1912
10	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	Airlines and Aviation	🇺🇸 Phoenix	2,148	1982
11	Abrazo Health abrazohealth.com An Arizona healthcare system with hospitals, specialty institutes, medical groups, and health plans focusing on employee wellness and personalized healthcare	Hospitals and Health Care	🇺🇸 Phoenix	1,938	2003
12	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.	Construction	🇺🇸 Phoenix	1,912	n/a
13	Valleywise Health valleywisehealth.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	Hospitals and Health Care	🇺🇸 Phoenix	1,728	1877
14	Western Alliance Bancorporation westernalliancebancorporation.com A top-performing banking company with $30 billion in assets, offering customized financial services through experienced bankers for businesses nationwide	Banking	🇺🇸 Phoenix	1,525	n/a
15	Sonora Quest Laboratories/ Laboratory Sciences of Arizona sonoraquest.com Performs over 97 million diagnostic tests annually including routine, molecular, genetic, and pathology testing, with 70+ patient service centers across Arizona.	Hospitals and Health Care	🇺🇸 Phoenix	1,482	1997
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16	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	Hospitals and Health Care	🇺🇸 Phoenix	1,244	1982
17	Sparklight sparklight.com A leading broadband communications provider offering high-speed internet, cable television, phone service, and digital marketing solutions to residential and business customers nationwide	Telecommunications	🇺🇸 Phoenix	1,158	1986
18	Hospice of the Valley hov.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	Hospitals and Health Care	🇺🇸 Phoenix	1,125	1977
19	Desert Financial Credit Union desertfinancial.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	Financial Services	🇺🇸 Phoenix	1,069	1939
20	Maricopa Integrated Health System valleywisehealth.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	Hospitals and Health Care	🇺🇸 Phoenix	957	1877
21	Barrow Neurological Institute barrowneuro.org Preserving and protecting thoughts, memories, dreams, personalities, and movement to prioritize what matters most	Hospitals and Health Care	🇺🇸 Phoenix	918	1962
22	Southwest Behavioral & Health Services sbhservices.org The company provides compassionate care and services in behavioral health, focusing on housing, prevention, outpatient services, and treatment of co-occurring disorders	Mental Health Care	🇺🇸 Phoenix	912	1969
23	Terros Health terroshealth.org Health care company specializing in mental health and substance use treatment, providing primary care to help individuals live in recovery and save lives	Hospitals and Health Care	🇺🇸 Phoenix	905	1969
24	National Bank of Arizona nbarizona.com This company provides exceptional customer service and builds local relationships by offering financial services through nearly 500 local financial centers	Banking	🇺🇸 Phoenix	833	1984
25	Adelante Healthcare adelantehealthcare.com A non-profit organization operating nine community health centers in Central Arizona, providing primary and preventative healthcare to over 85,000 individuals annually	Hospitals and Health Care	🇺🇸 Phoenix	550	1979
26	Arizona Financial Credit Union arizonafinancial.org Arizona Financial offers consumer and small business banking services, with a focus on convenience, local expertise, and commitment to strengthening local economies	Banking	🇺🇸 Phoenix	545	1936
27	Valley Metro RPTA valleymetro.org Develop and deliver integrated regional transit systems through collaboration with agencies and partnerships to improve quality of life and environment.	Ground Passenger Transportation	🇺🇸 Phoenix	426	1985
28	Connections Health Solutions connectionshs.com A pioneer in behavioral health crisis care, providing timely and effective services to stabilize and treat individuals with mental health and substance use diagnoses	Mental Health Care	🇺🇸 Phoenix	424	2009
29	Central Arizona Project centralarizonaproject.com A dedicated team delivers Colorado River water to central and southern Arizona, offering competitive salaries, benefits, and a focus on employee development	Utilities	🇺🇸 Phoenix	412	1971
30	OneAZ Credit Union oneazcu.com A credit union in Arizona dedicated to improving lives through personal and business banking solutions, community involvement, and member-owned benefits	Banking	🇺🇸 Phoenix	409	1951

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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 Nov 11, 2026.

Critical infrastructure operators headquartered in Phoenix

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