List of critical infrastructure operators in California (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Wells Fargo wellsfargo.com A diversified financial services company offering banking, investment, mortgage products, and more through numerous locations and digital platforms Serving customers globally	Financial Services	🇺🇸 San Francisco	234,570	n/a
2	Kaiser Permanente healthy.kaiserpermanente.org Leading not-for-profit health plan with a unique business model driving industry improvements, serving millions of members across multiple states and impacting communities positively	Hospitals and Health Care	🇺🇸 Oakland	137,397	1945
3	Dignity Health commonspirit.careers Providing accessible, compassionate healthcare through numerous hospitals and care centers across California, Arizona, and Nevada, offering a range of medical services and specialties	Hospitals and Health Care	🇺🇸 San Francisco	32,260	n/a
4	Visa visa.com A global leader in digital payments, connecting consumers, merchants, and financial institutions across 200+ countries with secure transaction solutions	IT Services and IT Consulting	🇺🇸 Foster City	30,900	n/a
5	Sutter Health sutterhealth.org Not-for-profit healthcare system providing comprehensive, affordable care through hospitals, clinics, telehealth, and community partnerships across California.	Hospitals and Health Care	🇺🇸 Sacramento	26,442	n/a
6	Pacific Gas and Electric Company pge.com Transmission and delivery of natural gas and electricity to approximately 15 million customers across a large service area in California.	Utilities	🇺🇸 Oakland	23,550	n/a
7	UCLA Health uclahealth.org Comprehensive healthcare system with top-ranked hospitals, advanced medical technology, expert physicians, and pioneering biomedical research across multiple specialties.	Hospitals and Health Care	🇺🇸 Los Angeles	17,812	1955
8	Cedars-Sinai careers.cshs.org Comprehensive healthcare provider excelling in patient care, pioneering research, advanced medical education, and community health improvement in Los Angeles.	Hospitals and Health Care	🇺🇸 Los Angeles	16,865	n/a
9	Adventist Health adventisthealth.org Faith-inspired nonprofit integrated health system in West Coast and Hawaii, providing care in various settings with a focus on whole-person healing	Hospitals and Health Care	🇺🇸 Roseville	16,088	n/a
10	City of Los Angeles linkpages.pro The City of Los Angeles offers a wide range of career opportunities through civil service positions, internships, and appointments in government roles	Government Administration	🇺🇸 Los Angeles	15,933	n/a
11	Stanford Health Care stanfordhealthcare.org Providing advanced, coordinated care in multiple specialties including cancer, neurosciences, cardiovascular, surgery, and organ transplant with innovative research and compassionate treatment.	Hospitals and Health Care	🇺🇸 Palo Alto	15,318	1885
12	Caja Costarricense de Seguro Social (CCSS)ccss.sa.cr A Costa Rican organization that provides comprehensive healthcare services and social protection to the population, as mandated by current legislation	Hospitals and Health Care	🇺🇸 San Jose	13,662	1941
13	Caltrans dot.ca.gov A transportation agency in California managing highways, freeways, rail services, airports, and heliports, focusing on engineering, maintenance, planning, and environmental responsibility	Government Administration	🇺🇸 Sacramento	12,936	n/a
14	Southern California Edison (SCE)sce.com A leading electric utility in Southern California focused on bringing clean and renewable energy sources to reduce emissions and promote innovation	Utilities	🇺🇸 Rosemead	12,652	1886
15	City of Hope cityofhope.org Comprehensive cancer research, treatment, and innovation with a national network, focusing on breakthrough medicines and patient care integration.	Hospitals and Health Care	🇺🇸 Duarte	12,442	1913
16	Scripps Health careers.scripps.org Non-profit healthcare system providing acute hospitals, outpatient centers, home health, hospice, and advanced clinical research in San Diego.	Hospitals and Health Care	🇺🇸 San Diego	11,885	1924
17	Sharp HealthCare careers.sharp.com Not-for-profit healthcare system offering acute, specialty hospitals, medical groups, and health plan with advanced, compassionate patient care services.	Hospitals and Health Care	🇺🇸 San Diego	11,594	1946
18	UCSF Health ucsfhealth.org Integrated health care network with top-ranked hospitals, specializing in innovative patient care, advanced technology, and pioneering research in various medical specialties	Hospitals and Health Care	🇺🇸 San Francisco	11,461	n/a
19	UC San Diego Health employment.ucsd.edu A leading academic health system in San Diego region, offering outstanding patient care, cutting-edge research, medical education, and community health programs	Hospitals and Health Care	🇺🇸 San Diego	10,962	1966
20	UC Davis Health health.ucdavis.edu Academic health system with top medical school, hospital, research centers, nursing school, and community partnerships advancing patient care and health innovation.	Hospitals and Health Care	🇺🇸 Sacramento	9,647	1968
21	City and County of San Francisco sf.gov The City & County of San Francisco empowers over 34,000 employees to provide diverse services, shaping the future and improving quality of life for residents	Government Administration	🇺🇸 San Francisco	9,472	1850
22	Union Bank The company provides financial services and has recently rebranded as US Bank Follow them for updates and information	Banking	🇺🇸 San Francisco	8,242	n/a
23	Loma Linda University Medical Center Murrieta llumcmurrieta.org Healthcare provider in Murrieta, California offering state-of-the-art medical services, advanced technology, and high-touch care in a healing environment	Hospitals and Health Care	🇺🇸 Murrieta	8,194	2011
24	Blue Shield of California blueshieldca.com Nonprofit health plan offering medical, dental, vision, Medicaid, and Medicare services to nearly six million members in California.	Insurance	🇺🇸 Oakland	7,973	1939
25	Prime Healthcare primehealthcare.com Operates 51 hospitals and 360 outpatient locations across 14 states, delivering high-quality patient care with recognized safety and excellence.	Hospitals and Health Care	🇺🇸 Ontario	7,325	2001
26	San Bernardino County linktr.ee A diverse public service organization in America's largest county, recognized for innovation and outstanding service, striving to create a prosperous community	Government Administration	🇺🇸 San Bernardino	7,272	1853
27	MemorialCare careers.memorialcare.org A leading nonprofit health system providing high-quality care in Orange County and Los Angeles County through hospitals, medical groups, and more	Hospitals and Health Care	🇺🇸 Fountain Valley	6,956	2005
28	Children's Hospital Los Angeles (CHLA)jobs.chla.org Dedicated to providing high-quality, compassionate care to children, empowering staff to create special moments free from pain and suffering	Hospitals and Health Care	🇺🇸 Los Angeles	6,900	1901
29	City National Bank newsroom.cnb.com Personalized banking, investment, and trust services across select U.S. markets, managing substantial client assets and supporting community nonprofits.	Banking	🇺🇸 Los Angeles	6,817	1954
30	Viasat viasat.com Global communications company providing connectivity solutions for consumers, businesses, governments, and militaries worldwide, ensuring internet access in remote locations and on-the-go	Telecommunications	🇺🇸 Carlsbad	6,809	1986
31	SoFi sofi.com Values-driven company providing modern financial products & services to help members borrow, save, spend, invest, and protect their money for financial independence	Financial Services	🇺🇸 San Francisco	6,754	2011
32	UCI Health linktr.ee A leading healthcare provider in Orange County offering high-quality medical care through top physicians, surgeons, and clinical staff	Hospitals and Health Care	🇺🇸 Orange	5,789	1976
33	RadNet radnet.com A leading provider of diagnostic imaging services with 370+ locations in core markets like California, offering services through a network of 9,000 employees	Hospitals and Health Care	🇺🇸 Los Angeles	5,667	1984
34	CSAA Insurance Group, a AAA Insurer careers.csaa-insurance.aaa.com The company is committed to excellence in providing insurance services, supporting employees, members, and communities, and embracing change for progress	Insurance	🇺🇸 Walnut Creek	5,564	n/a
35	Hoag Health System hoag.org A non-profit healthcare network in Orange County, CA, offering specialized services in cancer, heart, neurosciences, women's health, and orthopedics	Hospitals and Health Care	🇺🇸 Newport Beach	5,547	1952
36	Guild Mortgage guildmortgage.com A leading independent mortgage provider, prioritizing customer service with commitment to on-time closings and tailored loan options for homebuyers	Financial Services	🇺🇸 San Diego	5,337	1960
37	Stanford Medicine Children's Health stanfordchildrens.org Largest Bay Area pediatric and obstetric health system providing comprehensive clinical services, including rare condition treatments and well-child care.	Hospitals and Health Care	🇺🇸 Palo Alto	5,172	n/a
38	Keck Medicine of USC keckmedicine.org Leading medical enterprise in Southern California, providing specialized care with world-class research, top-ranked hospitals, and over 100 clinics in the region	Hospitals and Health Care	🇺🇸 Los Angeles	5,099	1991
39	PIH Health pihhealth.org A nonprofit healthcare network serving millions in Los Angeles, Orange County, and San Gabriel Valley with hospitals, medical offices, and specialized medical services	Hospitals and Health Care	🇺🇸 Whittier	5,065	n/a
40	Loma Linda University Medical Center lluh.org A leading medical center with over 900 beds, specialized in neonatal care, infant heart transplantation, proton treatments for cancer, and trauma care	Hospitals and Health Care	🇺🇸 Loma Linda	4,922	n/a
41	CHOC Children's choc.org Pediatric healthcare system with premier facilities, advanced programs, research, and training dedicated to children's health and recovery.	Hospitals and Health Care	🇺🇸 Orange	4,876	1964
42	Los Angeles Department of Water and Power ladwp.com Provide safe, reliable water and electricity services to millions of residents and businesses in Los Angeles, ensuring municipal utility needs.	Utilities	🇺🇸 Los Angeles	4,862	1902
43	Rady Children's Hospital-San Diego rchsd.org Leading pediatric health care system with a 511-bed hospital, 40+ locations, and a focus on serving San Diego and surrounding counties Nonprofit organization relying on donations	Hospitals and Health Care	🇺🇸 San Diego	4,856	1954
44	Pacific Life pacificlife.com Provides life insurance, annuities, mutual funds, and financial products to individuals and businesses for long-term financial security.	Financial Services	🇺🇸 Newport Beach	4,770	1868
45	John Muir Health johnmuirhealth.com Not-for-profit healthcare organization providing primary, specialty, trauma, behavioral health, and collaborative patient-centered medical services in multiple California counties.	Hospitals and Health Care	🇺🇸 Walnut Creek	4,207	n/a
46	Good Samaritan Hospital A hospital that provides medical care, support, and compassion to the community, aimed at helping individuals in times of need	Hospitals and Health Care	🇺🇸 San Jose	4,005	n/a
47	Silicon Valley Bank svb.com Commercial and private banking services for technology, healthcare, and life science companies, including venture capital and private equity investors throughout the United States.	Banking	🇺🇸 Santa Clara	3,950	n/a
48	East West Bank eastwestbank.com Provides banking services connecting U.S. and Asia, supporting businesses in real estate, media, venture capital, and high-tech sectors.	Banking	🇺🇸 Pasadena	3,916	1973
49	SoCalGas socalgas.com Largest gas distribution utility serving over 21 million consumers across Central and Southern California with safe, reliable, affordable energy.	Utilities	🇺🇸 Los Angeles	3,699	n/a
50	Los Angeles County Sheriff's Department lasd.org Provides law enforcement, public safety, jail management, court security, and homeland security services across Los Angeles County and its communities.	Public Safety	🇺🇸 Los Angeles	3,647	1850
51	Los Angeles Metro metro.net The company serves as a transportation planner, coordinator, designer, builder, and operator for a large county with over 96 million residents	Truck Transportation	🇺🇸 Los Angeles	3,638	n/a
52	Santa Clara Valley Medical Center scvh.org A public healthcare provider in Santa Clara County offering quality care, research, teaching, and innovation while focusing on a positive patient experience	Hospitals and Health Care	🇺🇸 San Jose	3,547	1876
53	City of Long Beach longbeach.gov The company is located in Long Beach, California, and is involved in various industries such as transportation, tourism, commerce, and oil operations	Government Administration	🇺🇸 Long Beach	3,423	n/a
54	El Camino Health elcaminohealth.org This company provides personalized healthcare at hospitals and clinics in Santa Clara County, offering advanced technology and nationally recognized medical specialties	Hospitals and Health Care	🇺🇸 Mountain View	3,337	1961
55	Banc of California bancofcal.com A premier California-based business bank offering full-service solutions to help clients achieve financial goals and grow their businesses	Banking	🇺🇸 Los Angeles	3,312	n/a
56	County of Los Angeles Department of Public Works pw.lacounty.gov The organization plans, designs, constructs, and upkeeps modern infrastructure to enhance all communities within LA County	Civil Engineering	🇺🇸 Alhambra	3,303	1985
57	Ascension Wisconsin ascension.org Nonprofit Catholic health system operating hospitals and facilities in Wisconsin, providing compassionate, personalized care with focus on vulnerable populations.	Hospitals and Health Care	🇺🇸	3,220	n/a
58	EVA Airways Corp.evaair.com Premium airline offering 5-star service, extensive global routes, safety certifications, and unique themed flights for enjoyable travel experiences.	Airlines and Aviation	🇺🇸 El Segundo	3,125	1989
59	UC Davis Medical Center ucdavis.edu A leading academic medical center with expertise in cancer, trauma care, neurodevelopmental disorders, and pediatric health, serving a large area through telemedicine	Hospitals and Health Care	🇺🇸 Sacramento	3,060	n/a
60	Eisenhower Health careers.eisenhowerhealth.org Award-winning medical facilities delivering high-quality, compassionate care with top rankings, safety, inclusivity, and a supportive work environment.	Hospitals and Health Care	🇺🇸 Rancho Mirage	2,887	1966
61	Loma Linda University Health lluh.org A leading health system in Southern California with professional schools, hospitals, and faculty physicians providing education, research, and clinical care	Hospitals and Health Care	🇺🇸 Loma Linda	2,878	1905
62	Palomar Health palomarhealth.org Provider of comprehensive healthcare services in North San Diego County with two medical centers and over 900 affiliated providers, offering various medical specialties and recognized for excellence in multiple areas	Hospitals and Health Care	🇺🇸 Escondido	2,861	1948
63	AltaMed Health Services altamed.org Providing primary medical, dental, and senior care across Southern California with a focus on community wellness and patient satisfaction.	Wellness and Fitness Services	🇺🇸 Los Angeles	2,852	1969
64	UCSF Benioff Children's Hospitals ucsfbenioffchildrens.org A top-rated children's hospital with campuses in Oakland and San Francisco, providing care and support to families in Northern California	Hospitals and Health Care	🇺🇸 Oakland	2,850	n/a
65	San Diego Gas & Electric sdge.com provides clean, safe, and reliable energy to improve lives in San Diego and southern Orange counties with over 4,000 employees	Utilities	🇺🇸 San Diego	2,822	1881
66	Mechanics Bank mechanicsbank.com Providing personal and business banking, trust, estate services, and wealth management through numerous branches across California communities.	Banking	🇺🇸 Walnut Creek	2,753	1905
67	Sonic sonic.com A leading ISP in California providing fast, reliable internet and phone service for businesses and homes since 1994 Known for prioritizing customer care and online privacy rights	Telecommunications	🇺🇸 Santa Rosa	2,751	1994
68	St. Joseph Health providence.org Healthcare organization undergoing a transition to the Providence name Stay connected for workplace culture, caregiver stories, and hiring information	Hospitals and Health Care	🇺🇸 Irvine	2,747	n/a
69	BART bart.gov A public transit system connecting the San Francisco Peninsula with East Bay and South Bay communities, providing safe, reliable transportation for residents and visitors	Rail Transportation	🇺🇸 Oakland	2,706	1957
70	California Department of Water Resources water.ca.gov This company oversees and manages California's water supply, including the State Water Project, while focusing on conservation, development, and sustainability	Government Administration	🇺🇸 Sacramento	2,703	1956
71	Kaweah Health kaweahhealth.org A progressive healthcare provider in Central Valley offering a wide range of medical services, including cardiac, orthopedic, and surgical care	Hospitals and Health Care	🇺🇸 Visalia	2,698	1963
72	California Department of State Hospitals dsh.ca.gov Manage California state hospitals providing mental health services, ensuring effective treatment in safe environments, meeting regulatory standards for care delivery	Hospitals and Health Care	🇺🇸 Sacramento	2,636	2012
73	Community Health System communityhealthsystem.org Nonprofit health system with 11,000 employees, 2,500 affiliated physicians, serving Central Valley residents regardless of payment ability.	Hospitals and Health Care	🇺🇸 Fresno	2,624	n/a
74	Torrance Memorial torrancememorial.org A nonprofit medical center offering quality healthcare services with advanced technology, compassionate care, and recognition for nursing excellence	Hospitals and Health Care	🇺🇸 Torrance	2,610	1925
75	Huntington Health huntingtonhealth.org Affiliated with Cedars-Sinai, Huntington Health provides a wide range of healthcare services, including emergency care, surgery, cancer treatment, and maternity services	Hospitals and Health Care	🇺🇸 Pasadena	2,581	1892
76	Sempra sempra.com A leading energy infrastructure company helping to electrify and decarbonize major markets in North America through sustainable practices and operational excellence	Utilities	🇺🇸 San Diego	2,572	n/a
77	Cottage Health cottagehealth.org A not-for-profit healthcare organization providing superior healthcare and improving community health through excellence, integrity, and compassion for over 125 years	Hospitals and Health Care	🇺🇸 Santa Barbara	2,570	1888
78	MemorialCare Long Beach Medical Center memorialcare.org A respected regional provider of medical and surgical services, consistently praised for quality care with state-of-the-art technology and a focus on patient safety	Hospitals and Health Care	🇺🇸 Long Beach	2,514	n/a
79	The Permanente Medical Group, Inc.northerncalifornia.permanente.org A California-based medical group located in Oakland, providing healthcare services through a network of physicians and medical professionals	Hospitals and Health Care	🇺🇸 Pleasanton	2,446	1945
80	LA Health Services dhs.lacounty.gov A leading municipal hospital system in Los Angeles County with a large budget, operating teaching hospitals, a rehabilitation hospital, and outpatient clinics	Hospitals and Health Care	🇺🇸 Los Angeles	2,445	n/a
81	California Department of Health Care Services linktr.ee Provides low-income, disabled residents affordable, high-quality medical, dental, mental health, substance use, long-term care services. Backbone California health safety net.	Government Administration	🇺🇸 Sacramento	2,372	n/a
82	St. Francis Medical Center stfrancismedicalcenter.com The company operates a hospital, health clinics, and trauma center in Los Angeles, providing a wide range of healthcare services and community initiatives	Hospitals and Health Care	🇺🇸 Lynwood	2,342	n/a
83	SchoolsFirst Federal Credit Union schoolsfirstfcu.org A Member-owned financial cooperative in California, dedicated to providing world-class personal service, financial security, and supporting the community	Financial Services	🇺🇸 Santa Ana	2,326	1934
84	Valley Children's Healthcare valleychildrens.org Central California's leading provider of specialized healthcare exclusively for children, offering comprehensive medical and surgical services, top-quality care, and pediatric training programs	Hospitals and Health Care	🇺🇸 Madera	2,247	1952
85	SMUD smud.org A community-owned electric service provider in Sacramento County, focused on low-cost, reliable electricity with innovative energy efficiency programs and sustainable solutions	Utilities	🇺🇸 Sacramento	2,209	1946
86	GFiber fiber.google.com Delivering fast, reliable internet through fiber optic and millimeter wave technology without data caps, fees, or contracts Seeking innovative individuals to join our team	Technology, Information and Internet	🇺🇸 Mountain View	2,206	2010
87	Los Angeles County Department of Mental Health dmh.lacounty.gov Providing mental health services to residents of all ages in Los Angeles County through diverse workforce and community partnerships for hope and recovery	Government Administration	🇺🇸 Los Angeles	2,153	n/a
88	Riverside University Health System ruhealth.org Riverside University Health System provides healthcare services, focusing on medical treatment, wellness initiatives, and community health education in Riverside, California	Hospitals and Health Care	🇺🇸 Moreno Valley	2,133	n/a
89	San Francisco Department of Public Health sf.gov The company's mission is to protect and promote the health of all San Franciscans through comprehensive healthcare services and public health initiatives	Hospitals and Health Care	🇺🇸 San Francisco	2,118	n/a
90	Golden 1 Credit Union golden1.com California's leading financial cooperative, offering a wide range of financial products and services with a focus on member satisfaction and community impact	Banking	🇺🇸 Sacramento	2,073	1933
91	IEHP iehp.org A top 10 largest Medicaid health plan and the largest not-for-profit Medicare-Medicaid plan, providing quality, accessible, and wellness-based healthcare services	Hospitals and Health Care	🇺🇸 Rancho Cucamonga	2,054	1995
92	NorthBay Health northbayhealthinfo.org A nonprofit health care organization providing comprehensive services including hospitals, specialty care, cancer center, fitness center, and primary care facilities since 1960	Hospitals and Health Care	🇺🇸 Fairfield	1,991	1959
93	Federal Reserve Bank of San Francisco frbsf.org Support monetary policy, strengthen financial institutions, and enhance payment systems to promote economic stability and growth across western U.S. regions.	Financial Services	🇺🇸 San Francisco	1,964	1913
94	LADWP ladwp.com The company delivers water and electricity to over 38 million residents in Los Angeles, with a budget of billions for operations and capital projects	Utilities	🇺🇸 Los Angeles	1,940	1902
95	Pomona Valley Hospital Medical Center pvhmc.org A nationally recognized not-for-profit hospital providing a wide range of specialized medical services, including oncology, cardiac care, women's services, and more	Hospitals and Health Care	🇺🇸 Pomona	1,919	1903
96	L.A. Care Health Plan lacare.org provides health coverage plans for low-income communities in Los Angeles County, focusing on quality, access, and inclusion	Hospitals and Health Care	🇺🇸 Los Angeles	1,916	1997
97	Edison International edison.com A leading electric power generator and distributor, investing in renewable energy, infrastructure, and energy assets through its subsidiaries Based in California	Utilities	🇺🇸 Rosemead	1,900	n/a
98	San Francisco Municipal Transportation Agency (SFMTA)sfmta.com Management of public transit, parking, traffic, bicycling, walking, and taxi regulation to ensure efficient city transportation services.	Truck Transportation	🇺🇸 San Francisco	1,897	n/a
99	Montage Health montagehealth.org A nonprofit organization offering diverse healthcare services including preventive, restorative, palliative care, mental healthcare, and wellness programs with a shared vision of optimal health	Hospitals and Health Care	🇺🇸 Monterey	1,851	n/a
100	Arrowhead Regional Medical Center arrowheadregional.org A hospital in Colton, California, providing medical services to patients in the United States at 400 N Pepper Avenue	Hospitals and Health Care	🇺🇸 Colton	1,830	1999

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List of critical infrastructure operators in California

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