| # | Company | Employees |
|---|---|---|
| 1 |
DaVita Kidney Caredavita.com
Leaders in dialysis, providing essential life-sustaining treatment for end-stage kidney disease. Minimizing impacts of kidney disease across full spectrum of kidney health care. |
39,850 |
| 2 |
EchoStar Corporationechostar.com
provider of technology, networking services, television entertainment, and connectivity solutions for consumers, enterprises, operators, and governments worldwide |
28,509 |
| 3 |
UCHealthuchealth.org
Innovative healthcare provider promoting individual and community health with excellent care, advanced treatments, and a team of exceptional professionals |
23,481 |
| 4 |
CHIcommonspirit.careers
Nonprofit faith-based health system providing care in 18 states through hospitals, academic centers, nursing colleges, home-health agencies, and community services |
18,841 |
| 5 |
DISH TVechostar.com
Providing TV entertainment services focusing on rural areas and offering streaming options to expand consumer choice in entertainment. |
14,638 |
| 6 |
Empowerempower.com
Providing personalized financial tools and wealth management services to help millions achieve financial confidence and pursue their unique goals. |
13,747 |
| 7 |
American Medical Responseamr.net
Leading provider of medical transportation services including emergency response, interfacility transport, event medical support, and disaster response as part of Global Medical Response family |
11,905 |
| 8 |
Children's Hospital Coloradochildrenscolorado.org
Providing specialized, compassionate pediatric healthcare through multiple hospitals, specialty centers, and outreach clinics across Colorado and the region. |
8,954 |
| 9 |
Liberty Latin Americalla.com
A leading telecommunications company in Latin America and the Caribbean offering triple-play and quad-play services, enterprise connectivity, fiber optic network, and IT solutions |
6,564 |
| 10 |
Denver Healthdenverhealth.org
Integrated academic health care system in Denver, providing high-quality care, trauma center, emergency response, family health centers, and community resources with a focus on diversity and equality |
6,405 |
| 11 |
Boost Mobiledish.com
A nationwide wireless provider offering affordable, reliable service to diverse communities, constantly improving their network to deliver value to customers |
6,382 |
| 12 |
HCA HealthONEhealthonecares.com
HealthONE庐 is a part of HCA Healthcare and the largest healthcare system in metro Denver, providing comprehensive care with various facilities and services |
6,312 |
| 13 |
Frontier Airlinesflyfrontier.com
Providing affordable air travel with a modern fleet, extensive destinations, and a strong loyalty program focused on fuel efficiency and innovation. |
6,185 |
| 14 |
Centura Health
AdventHealth and CommonSpirit Health manage hospitals and clinics in Colorado, Kansas, and Utah, prioritizing community needs through direct affiliation |
5,944 |
| 15 |
DaVitadavita.com
A global healthcare provider specializing in kidney care, prioritizing employee and patient well-being, innovation, and community impact |
4,925 |
| 16 |
Zayo Groupzayo.com
provides extensive fiber network connectivity and tailored edge solutions powering carriers, cloud providers, data centers, educational institutions, and enterprises |
4,478 |
| 17 |
Air Methodsairmethods.com
Provider of emergency air medical transport and treatment, with a skilled workforce dedicated to saving lives and providing access to critical care nationwide |
4,416 |
| 18 |
FirstBankefirstbank.com
A financial institution in Colorado with over $27 billion in assets, offering consumer and commercial lending, banking services, and community investment Expanding to California and Arizona |
3,931 |
| 19 |
Ovintivovintiv.com
A leading North American energy producer focused on developing oil, natural gas liquids, and natural gas producing plays with innovative strategies |
2,878 |
| 20 |
SCL Healthjobs.sclhealth.org
A nonprofit health system in multiple states providing high-quality care, prioritizing patients & caregivers to make a difference in communities |
2,719 |
| 21 |
WOW! Internet, TV, & Phonewowforbusiness.com
A leading broadband provider offering fast, reliable Internet, TV, and phone services for residential and business customers across multiple states |
2,325 |
| 22 |
RTDrtd-denver.com
Public transportation organization in the Denver/Boulder metro area, providing bus, train, paratransit, airport, and special event services with real-time trip planning options |
2,225 |
| 23 |
Modivcaremodivcare.com
Technology-enabled healthcare services offering integrated supportive care solutions addressing social determinants, improving access, reducing costs, and enhancing patient outcomes. |
2,134 |
| 24 |
City of Auroraauroragov.org
Municipal government providing public safety, water quality, and community services, fostering a diverse and award-winning living environment. |
2,093 |
| 25 |
Coram CVS/specialty infusion servicesjobs.cvshealth.com
National provider of specialty home infusion and pharmacy services, offering comprehensive care for over 20,000 patients monthly through infusion therapies and services |
2,087 |
| 26 |
Boulder Community Healthbch.org
An integrated regional health system in Boulder and Broomfield counties, known for clinical excellence in heart, neurosurgery, stroke, orthopedic, and cancer care |
1,779 |
| 27 |
City of Fort Collinsfcgov.com
Local government managing internal, financial, police, utilities, and community services while supporting education, recreation, culture, and economic opportunities. |
1,706 |
| 28 |
Swedish Medical CenterHealthONEcares.com
Acute care hospital in south Denver offering advanced stroke, trauma, orthopedic, and specialty medical services with a focus on quality patient care |
1,689 |
| 29 |
National Jewish Healthnationaljewish.org
Advanced research and personalized care for pulmonary, cardiac, immune, and related conditions, focusing on predicting, preventing, and treating diseases for better health outcomes |
1,658 |
| 30 |
CoBankcobank.com
A cooperative bank providing financial services to agribusinesses, rural power, water, and communications providers nationwide, supporting US agriculture and rural communities |
1,601 |
| 31 |
City of Boulderbouldercolorado.gov
Provides municipal services, supports local businesses, promotes outdoor recreation, manages transportation, and fosters academic and technological resources in Boulder. |
1,530 |
| 32 |
DCP Midstreamdcpmidstream.com
An innovative energy company based in Denver, providing midstream logistics services in over 10 states Emphasizes employee development and competitive benefits |
1,446 |
| 33 |
Parkview Medical Centeruchealth.org
A medical center within UCHealth's network offering advanced care, latest technology, and skilled physicians serving Pueblo and surrounding areas |
1,399 |
| 34 |
InnovAgeinnovage.com
InnovAge provides care and support for seniors to age at home with dignity through the PACE program, focusing on independence and quality of life |
1,274 |
| 35 |
tw telecomlumen.com
A technology leader providing hybrid networking, cloud connectivity, and security solutions globally through an extensive global fiber network |
1,192 |
| 36 |
Denver International Airport - City & County of Denver Dept of Aviationflydenver.com
A major airport hub in Colorado, employing thousands and generating billions for the region annually Embraces diversity and offers a wide range of career opportunities |
1,185 |
| 37 |
Salud Family Healthsaludclinic.org
Federally Qualified Health Center with 13 clinic locations, 11 school sites, and a mobile unit providing medical, dental, pharmacy, and behavioral health care services to underserved populations |
1,167 |
| 38 |
City of Westminsterwestminsterco.gov
Develops sustainable and inclusive communities with safe neighborhoods and beautiful open space, fostering a thriving environment for residents to live in |
1,144 |
| 39 |
Memorial Hospital - University of Colorado Healthuchealth.org
A Level II trauma center with two hospitals in Colorado Springs, offering over 500 beds and serving the Pikes Peak Region |
1,112 |
| 40 |
Tallgrasstallgrass.com
A leading energy infrastructure company delivering safe, reliable, and sustainable energy solutions across the US for a cleaner energy future |
1,104 |
| 41 |
Ent Credit Unionent.com
This leading Colorado credit union offers a full range of financial solutions to over 500,000 members through various banking services |
1,058 |
| 42 |
Valley Viewvvh.org
An independent, nonprofit health system based in Glenwood Springs, Colorado, providing integrated care across physician practices, specialty centers, and hospitals |
1,052 |
| 43 |
Lutheran Health Networklutheranhealth.net
Healthcare network in northeastern Indiana with over 6,000 employees dedicated to providing compassionate, quality care to every patient |
1,051 |
| 44 |
BioScrip, Inc.optioncarehealth.com
A national provider of infusion and home care management solutions, working with healthcare professionals to deliver post-acute care services in home settings |
985 |
| 45 |
DispatchHealthdispatchhealth.com
The company offers trusted home-based medical care for individuals with serious health issues, including urgent care, recovery care, and hospital alternatives |
982 |
| 46 |
Tri-State Generation and Transmission Association, Inc.tristate.coop
A not-for-profit power supplier to electric cooperatives in the Western US, providing affordable, responsible-generated power to rural communities |
978 |
| 47 |
Denver Waterdenverwater.org
The company is a nonpolitical municipal agency that provides high-quality water to 15 million people in Denver and surrounding suburbs They promote efficient water use |
978 |
| 48 |
Western Area Power Administrationwapa.gov
Markets and delivers over 10,000 megawatts of hydropower from federal dams to various public and tribal entities across 15 states. |
946 |
| 49 |
City of Longmontlongmontcolorado.gov
A company based in Longmont, Colorado, offering a vibrant community with outdoor activities, high-tech companies, and a scenic location near Denver and Boulder |
945 |
| 50 |
Vail Healthvailhealth.org
A nonprofit community health care system comprising a 56-bed hospital, urgent care clinics, specialty health centers, and sports medicine services |
919 |
| 51 |
Craig Hospitalcraighospital.org
A renowned rehabilitation hospital specializing in spinal cord and brain injury care, offering comprehensive medical services for optimal patient outcomes |
905 |
| 52 |
The Medical Center of Auroraauroramed.com
A leading acute care hospital in Aurora, Colorado with multiple campuses offering a range of medical services and recognized for excellence in healthcare |
884 |
| 53 |
City of Greeleygreeleyco.gov
The company is a city in Colorado focused on community excellence, art, culture, innovation, growth, and development, seeking innovative thinkers to shape its future |
852 |
| 54 |
Rose Medical Centerrosemed.com
A leading healthcare facility in Denver providing comprehensive services including women's care, orthopedics, heart care, and bariatric surgery, focusing on improving human life |
807 |
| 55 |
City of Thornton, Coloradothorntonco.gov
The City of Thornton in Colorado offers a diverse community, quality of life, environmental commitment, and numerous recreational opportunities for residents |
770 |
| 56 |
Sky Ridge Medical Centerskyridgemedcenter.com
A leading hospital in Colorado, offering compassionate care through specialized programs in cancer, emergency, birthing, spine/joint, women's, pediatric, orthopedic, and trauma services |
709 |
| 57 |
Canvas Credit Unioncanvas.org
An established Colorado-based credit union prioritizing members' wellbeing, offering financial services with higher savings rates, lower loan rates, and extensive access options |
663 |
| 58 |
Alpine Bankalpinebank.com
Employee-owned bank in Colorado offering personal, business, wealth management, mortgage, and online banking services with a focus on community support through volunteering and donations |
651 |
| 59 |
Mercy Regional Medical Centermountain.commonspirit.org
An organization with an online platform providing information and resources related to their industry |
648 |
| 60 |
Antero Resourcesanteroresources.com
An independent E&P company focused on exploiting, developing, and acquiring natural gas, NGLs, and oil properties in the Appalachia Basin |
634 |
| 61 |
Jefferson Center for Mental Healthjcmh.org
A nonprofit organization providing community-focused mental health care and substance use services, offering hope and support to individuals and families in need |
611 |
| 62 |
Mental Health Center of Denverwellpower.org
A not-for-profit mental health center in Denver, focused on providing support and inclusive services to help individuals flourish and thrive |
605 |
| 63 |
AdventHealth Coloradonetworkofcare.adventhealth.com
A healthcare organization dedicated to extending the healing ministry of Christ through a unified system of hospitals and care sites |
594 |
| 64 |
Elevations Credit Unionelevationscu.com
Member-owned financial institution in Colorado's Front Range offering top workplace benefits, diversity awards, and leading credit union mortgage lending in the state |
591 |
| 65 |
MarkWest Energy Partners, L.P.mplx.com
A master limited partnership engaged in gathering, processing, and transporting natural gas, natural gas liquids, and crude oil in various regions of the United States |
579 |
| 66 |
Credit Union of Coloradocuofco.org
The company focuses on providing financial products and services with a commitment to trust, quality, and service for its members and community |
355 |
| 67 |
QEP Resourcesqepres.com
A leading independent crude oil and natural gas exploration and production company, focused on the Permian Basin and Williston Basin in the US |
351 |
| 68 |
Pivot Energypivotenergy.net
National solar provider with expertise in developing, financing, building, and managing solar and energy storage projects Offers services and software for the full solar ecosystem |
271 |
| 69 |
Civitas Resourcescivitasresources.com
A company with operational expertise in the energy industry, focusing on sustainability and delivering value to local economies and neighbors |
267 |
| 70 |
Onward Energyonwardenergy.com
An independent power platform operating utility-scale wind, solar, and natural gas projects across the US, providing reliable and renewable energy solutions |
260 |
| 71 |
SourceGaswebsafe.virginmedia.com
A natural gas utility providing distribution, transmission, storage, and related services to over 415,000 customers in multiple states |
191 |
| 72 |
TransMontaigne Partners LLCtransmontaignepartners.com
A leading provider of terminaling, storage, and transportation services to the energy industry with a network of midstream terminals across the US |
176 |
| 73 |
Pueblo Community Health Center, Inc.pueblochc.org
A nonprofit healthcare provider offering comprehensive medical, dental, emergency, and outreach services including perinatal care, mental health services, and school-based wellness programs |
154 |
| 74 |
Air Academy Credit Unionaacu.com
A full-service financial institution providing personalized solutions to help members achieve their goals, serving a diverse community of individuals and businesses |
144 |
| 75 |
JUWI Inc.juwiamericas.com
A developer, EPC contractor, and operator of large-scale renewable energy generation facilities globally, with a focus on the North American market |
118 |
| 76 |
La Plata Electric Associationlpea.coop
An electric distribution cooperative serving over 33,000 members in Colorado and New Mexico, providing safe, reliable, and environmentally responsible energy services |
80 |
| 77 |
PureSky Energypureskyenergy.com
A company providing renewable energy solutions to energize progress, improve lives, and promote environmental stewardship for a sustainable legacy |
75 |
| 78 |
Meritage Midstreammeritagemidstream.com
A midstream services company offering natural gas, NGL, crude oil gathering, processing, and transportation, focusing on strategic partnerships and unconventional shale plays |
72 |
| 79 |
High Sierra Energy, LP - Subsidiary of NGL Energy Partners LPhighsierraenergy.com
A midstream energy company based in Denver, Colorado, operating in the natural resources industry, specializing in gathering, transporting, marketing crude oil and NGLs, and providing oilfield water services |
60 |
| 80 |
Grand Valley Bankgrandvalleybank.com
This company is a bank that provides financial services and solutions to individuals, businesses, and organizations in their community |
53 |
| 81 |
Elk Petroleumelkpetroleum.com
Company specializing in developing and producing long-lived oil and gas reserves in the Greater Aneth Field, with ownership of wells, infrastructure, and operating units |
52 |
| 82 |
Peregrine Energy Solutions, LLCperegrineenergysolutions.com
The company operates a portfolio of clean renewable assets with a focus on utility-scale energy storage in North America |
44 |
| 83 | 19 | |
| 84 |
Gary-Williams Energy Corporationgwec.com
An energy company with refining operations in Oklahoma, producing gasoline, diesel fuel, jet fuel, solvents, and asphalt with a total capacity of 185,000 bpd |
12 |
| 85 |
Tenawa Resource Management LLCtenawa-rm.com
A Colorado-based company offering midstream solutions through strategic partnerships Specializes in natural gas processing and helium recovery in the Mid-Continent region |
7 |
| 86 |
West Edgewestedgeenergy.com
A transportation and distribution company specializing in refined petroleum products, crude oil, natural gas, and water, providing infrastructure solutions to energy producers |
3 |
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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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- Software Development companies in Colorado 92
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- Financial services firms in Colorado 68
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- Healthcare providers in Colorado 65
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- Government Administration companies in Colorado 49
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The same list elsewhere in United States
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- Critical infrastructure operators in North Carolina 109
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- Critical infrastructure operators in Michigan 93
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