Editor’s note: This information was taken from the Energage database. The businesses provide the data, and it may have changed since it was first entered into the database.
No. 1
Years named: 13
Founded: 2008
Headquarters: Greenwood Village
Employees: 179
Locations: 3 in Colorado
Facts: Madison & Co. focuses on providing broker support, a collaborative team environment, and an extensive mentoring program.
No. 2
Years named: 8
Founded: 2017
Headquarters: Lakewood
Employees: 425
Facts: West + Main is an independently owned and operated boutique real estate company specializing in residential properties along the Front Range and mountain communities.
No. 3
Years named: 7
Founded: 2002
Headquarters: Lakewood
Employees: 442
Facts: Bloom Healthcare’s providers deliver coordinated, hands-on care in assisted living communities and private homes to help patients age in place. The company works to reduce seniors’ risk of needing emergency room or inpatient care.
No. 4
Years named: 2
Founded: 2013
Headquarters: Fairfax, Virginia
Employees: 330, with 50 in Colorado
Facts: Strategic Alliance Business Group LLC is a privately owned professional services company, certified as both a Service-Disabled Veteran-Owned and Women-Owned Small Business. It provides support to commercial and federal clients in program management, acquisition, strategic planning, mission operations, intelligence, logistics, and engineering.
No. 5
Years named: 4
Founded: 2012
Headquarters: Boulder
Employees: 246, 50 in Colorado
Facts: Green Spoon is a national natural food and beverage sales agency that serves natural and conventional groceries.
No. 6
Years named: 5, 3 consecutive
Founded: 2004
Headquarters: Denver
Employees: 193
Facts: Vivax Pros protects and beautifies homes by offering exterior and interior painting, siding, and gutter installation. The company also plants a tree for every customer it serves.
No. 7
Years named: 2
Founded: 1989
Headquarters: Alexandria, Virginia
Employees: 353, with 52 in Colorado
Facts: rand* construction corporation is a general contractor specializing in commercial tenant interiors. It offers pre-construction planning, construction, and ground-up services nationwide, with offices in Washington, D.C., Atlanta, Austin, Dallas, Denver, Houston, and Salt Lake City.
No. 8
Years named: 7
Founded: 1969
Headquarters: Denver
Employees: 195
Locations: 9
Facts: General Air Service & Supply is a third-generation, family-owned business, and Colorado’s largest independent gas and welding supplier.
No. 9
Years named: 11
Founded: 1973
Headquarters: Centennial
Employees: 415, with 385 in Colorado
Locations: 3
Facts: Haselden Construction is a top general contractor on the Front Range. It provides exceptional, client-centric construction services in Colorado, Wyoming, and the Western United States. The company offers a range of services, including general contracting, construction management, design-build, turnkey development, and preconstruction services.
No. 10
Years named: 13, 11 consecutive
Founded: 1985
Headquarters: Denver
Employees: 219
Locations: 2
Facts: Donor Alliance is the organ and tissue procurement agency for Colorado and most of Wyoming.
No. 11
Years named: 2
Founded: 1979
Headquarters: Durango
Employees: 158
Facts: StoneAge engineers and manufactures high-pressure waterblast tools and automated equipment for industrial cleaning.
No. 12
Years named: 2
Founded: 1952
Headquarters: Greenwood Village
Employees: 216
Facts: G.H. Phipps is a full-service general contracting company headquartered in Greenwood Village with branch offices in Colorado Springs, Fort Collins, Cheyenne and Laramie.
No. 13
Years named: 5
Founded: 1931
Headquarters: Denver
Employees: 375
Facts: Colorado Public Employees’ Retirement Association (PERA) is the state’s largest public pension plan, providing retirement and other benefits to more than 630,000 current and former public employees.
No. 14
Years named: 5
Founded: 2014
Headquarters: Greenwood, Indiana
Employees: 375, 125 in Colorado
Facts: The Garrett Companies is a full-service multifamily development, construction, and property management team that develops, builds, and manages multifamily apartment projects nationwide.
No. 15
Years named: 4, 3 consecutive
Founded: 1985
Headquarters: Burlingame, Calif.
Employees: 361, with 50 in Colorado
Facts: ECC provides clients with comprehensive environmental remediation and engineering services. The company has expanded its core capabilities to include construction, design-build, energy, and munitions response services.
No. 16
Years named: 14
Founded: 2008
Headquarters: Wheat Ridge
Employees: 208
Facts: Visiting Angels of Denver offers supportive home care services for seniors and adults, enabling them to remain safely in their homes and providing peace of mind to their families.
No. 17
Years named: 1
Founded: 2008
Headquarters: Minneapolis
Employees: 375, with 72 in Denver
Facts: H2I Group is a specialty subcontractor and employee-owned company that partners with the most reputable suppliers on athletic, laboratory, and technical education projects.
No. 18
Years named: 3, 1 consecutive
Founded: 2016
Headquarters: Denver
Employees: 259, with 100 in Denver.
Facts: Parkwell manages a diverse and growing portfolio of parking facilities and valet services in Colorado and beyond.
No. 19
Years named: 15
Founded: 1898
Headquarters: Kansas City, Missouri
Employees: 13,500, with 484 in Colorado
Facts: Burns & McDonnell is one of the largest engineering and architecture companies in the United States, with over 13,500 employees in 60 offices worldwide.
No. 20
Years named: 3
Founded: 1960
Headquarters: Indianapolis
Employees: 409, with 50 in Colorado
Locations: 2
Facts: Haynie & Company is a tax, audit, and business consulting firm with offices in 13 locations across Utah, Colorado, Texas, Nevada, and Arizona.
No. 21
Years named: 2
Founded: 2009
Headquarters: Louisville
Employees: 326
Facts: Biodesix specializes in data-driven diagnostic solutions for lung diseases, developing tests that utilize artificial intelligence and advanced technologies.
No. 22
Years named: 14, 11 consecutive
Founded: 1973
Headquarters: Denver
Employees: 185
Facts: Applewood Plumbing Heating & Electric, known for its bright orange trucks, is one of Colorado’s only family-owned plumbing, heating, drain cleaning, cooling, and electrical repair companies.
No. 23
Years named: 3
Founded: 1985
Headquarters: Memphis, Tennessee
Employees: 286, with 57 in Colorado
Facts: Logical Systems is a global systems integrator specializing in automation, systems integration, electrical engineering, and process optimization.
No. 24
Years named: 1
Founded: 1999
Headquarters: Denver
Employees: 246
Facts: First Integrity Title provides secure, accurate, and timely closing, escrow, and settlement solutions for homebuyers, real estate agents, lenders, and attorneys.
No. 25
Years named: 6, 2 consecutive
Founded: 1998
Headquarters: Greenwood Village
Employees: 315, with 104 in Colorado
Facts: SambaSafety is the industry leader in cloud-based driver risk management software. It helps companies identify their high-risk driving populations, making roads safer for everyone.
No. 26
Years named: 2
Founded: 2009
Headquarters: Denver
Employees: 437, with 185 in Colorado
Facts: Lifetime Home Remodeling offers services including window and door replacements, siding installation, and bathroom renovations.
No. 27
Years named: 4
Founded: 2006
Headquarters: Louisville
Employees: 250
Facts: Alchemer, formerly SurveyGizmo, offers survey software to help gather customer feedback and conduct market research for over 11,000 customers.
No. 28
Years named: 2
Founded: 1984
Headquarters: Arvada
Employees: 184, with 80 in Colorado
Locations: 3 in Colorado
Facts: Sonsio offers affordable vehicle protection plans to help keep vehicles safe on the road and maintain their like-new appearance.
No. 29
Years named: 9
Founded: 1982
Headquarters: Greenwood Village
Employees: 329, with 232 in Colorado
Locations: 3 in Colorado
Facts: Based in the Denver Tech Center, Galloway & Company provides planning, architecture, and engineering services for projects that range from half-acre pad sites to master-planned communities.
No. 30
Years named: 2
Founded: 1928
Headquarters: Denver
Employees: 800, with 175 in Colorado
Facts: Globus is a collection of travel companies that offer a variety of escorted tours, river cruises, and independent travel packages.
No. 31
Years named: 8, 3 consecutive
Founded: 1997
Headquarters: Cincinnati, Ohio
Employees: 9,000, with 164 in Colorado
Facts: TQL collaborates with a network of over 160,000 carriers to connect customers with shipping needs to carriers with available capacity and service offerings. The company moves 3 million freight loads annually.
No. 32
Years named: 5
Founded: 2012
Headquarters: Aurora
Employees: 476, with 200 in Colorado
Facts: Bibbeo is a nationally recognized technology solutions provider that offers services and installations across the United States.
No. 33
Years named: 7
Founded: 1982
Headquarters: Lakewood
Employees: 323, with 162 in Colorado
Facts: NEI Electric Power Engineering is a privately held engineering firm specializing in sustainable and reliable power systems. It offers services throughout the project lifecycle, from conceptualization to construction, and includes photovoltaic design, battery energy storage systems, wind collection, substation design, and other related services.
No. 34
Years named: 6, 4 consecutive
Founded: 1995
Headquarters: Aurora
Employees: 430
Facts: Colorado Access is a nonprofit health plan offering members personalized care and services.
No. 35
Years named: 3, 2 consecutive
Founded: 2011
Headquarters: Denver
Employees: 431
Facts: Home Care RN provides patient-centered home health care by partnering with patients, their families, and their providers to serve patients while supporting staff professional and personal aspirations.
No. 36
Years named: 7, 2 consecutive
Founded: 2013
Headquarters: Denver
Employees: 162
Facts: AFC Urgent Care offers fast and comprehensive medical care with short wait times and reasonable rates. The company provides prompt and comprehensive healthcare services, featuring an on-site laboratory and digital X-ray machine, to enhance the diagnosis and treatment of illnesses and injuries.
No. 37
Years named: 5
Founded: 1991
Headquarters: Denver
Employees: 240
Facts: HCA HealthONE, a part of HCA Healthcare, is among the largest healthcare systems in the metro Denver area with seven acute care hospitals, a pediatric hospital, a rehabilitation hospital, several free-standing emergency departments, numerous ambulatory surgery centers, CareNow urgent care and occupational medicine clinics, physician practices, imaging centers, and more.
No. 38
Years named: 6, 4 consecutive
Founded: 1958
Headquarters: Centennial
Employees: 161
Facts: Delta Dental of Colorado provides dental benefits to 1.5 million members, making dental care more accessible and affordable through easy-to-use plans.
No. 39
Years named: 1
Founded: 2010
Headquarters: Englewood
Employees: 257, with 150 in Colorado
Facts: E2 Optics is a woman-owned technology integrator specializing in low-voltage infrastructure solutions, including structured cabling, audiovisual, security, and wireless/DAS systems.
No. 40
Years named: 10, 3 consecutive
Founded: 1985
Headquarters: Greenwood Village
Employees: 290, with 150 in Colorado
Locations: 12
Facts: Griffis Residential owns and manages high-quality apartment communities in premier locations, including Denver, Seattle, San Diego, Portland, Ore., and Austin, Texas.
No. 41
Years named: 1
Founded: 1953
Headquarters: Minneapolis
Employees: 8,500, with 210 in Colorado
Facts: CLA provides industry-focused wealth advisory, digital, audit, tax, consulting, and outsourcing services.
No. 42
Years named: 1
Founded: 1959
Headquarters: Eau Claire, Wisconsin
Employees: 383, with 74 in Colorado
Facts: Ayres is a nationwide, employee-owned engineering and architecture firm that specializes in infrastructure projects.
No. 43
Years named: 13, 4 consecutive
Founded: 1990
Headquarters: Denver
Employees: 215
Locations: 4
Facts: Lohmiller and Company is an independently owned wholesale distributor of heating, ventilation, and air conditioning equipment, parts, and supplies. The company primarily distributes Carrier products in Colorado and Wyoming.
No. 44
Years named: 1
Founded: 2016
Headquarters: Boulder
Employees: 195
Facts: Scout specializes in wind, solar, and battery storage projects across more than 24 U.S. states.
No. 45
Years named: 1
Founded: 1970
Headquarters: Minneapolis
Employees: 360, with 58 in Colorado
Facts: Centerspace owns, manages, and develops apartment communities in Colorado, Minnesota, Montana, Nebraska, North Dakota, and South Dakota.
No. 46
Years named: 10, 9 consecutive
Founded: 1946
Headquarters: Aurora
Employees: 640, with 339 in Colorado
Facts: Adolfson & Peterson Construction is a family-owned company consistently ranked among the nation’s top construction managers and general contractors.
No. 47
Years named: 10, 6 consecutive
Founded: 2005
Headquarters: Niwot
Employees: 267, with 167 in Colorado
Facts: Wiland is a leading marketing intelligence agency that provides data-driven marketing solutions to thousands of clients across the United States.
No. 48
Years named: 1
Founded: 1993
Headquarters: Eden Prairie, Minnesota
Employees: 383, with 105 in Colorado
Locations: 5 in Colorado
Facts: Foss Swim School offers a year-round swimming program for all ages, focusing on teaching water safety, technique, and confidence through a structured curriculum.
No. 49
Years named: 1
Founded: 1913
Headquarters: Deforest, Wisconsin
Employees: 261, with 50 in Colorado
Facts: Hooper Corporation is a full-service electrical power and mechanical contractor specializing in high-voltage substation construction, overhead line services, and mechanical services, including HVAC, plumbing, and fire protection.
No. 50
Years named: 2, 1 consecutive
Founded: 1873
Headquarters: Broomfield
Employees: 368, with 60 in Colorado
Locations: 2 in Colorado
Facts: Epiroc USA is a leading productivity partner for the mining, infrastructure, and natural resources industries, specializing in innovative equipment, service, and digital solutions.
No. 51
Years named: 1
Founded: 1958
Headquarters: Knoxville, Tennessee
Employees: 388, with 52 in Colorado
Facts: Vanterra Foundation Solutions provides basement waterproofing, crawlspace encapsulation, radon and soil-gas reduction, foundation repair, and mold remediation for homes and commercial properties.
No. 52
Years named: 2, 1 consecutive
Founded: 1874
Headquarters: Erie
Employees: 287
Facts: The Town of Erie employs more than 512 hardworking, dedicated, and talented individuals who serve its residents and visitors.
No. 53
Years named: 5, 2 consecutive
Founded: 1991
Headquarters: Centennial
Employees: 860, with 143 in Colorado
Facts: SEMA Construction is a full-service contractor that provides civil and industrial construction services. Approximately 80% of its business comes from government contracts awarded through a competitive bidding process.
No. 54
Years named: 1
Founded: 1972
Headquarters: Centennial
Employees: 256, with 117 in Colorado
Facts: Winn-Marion Companies provides industrial automation, control, and electrical services, specializing in turnkey solutions for sectors like oil and gas, mining, and power.
No. 55
Years named: 1
Founded: 1931
Headquarters: Lakewood
Employees: 170
Facts: Credit Union of Denver, a not-for-profit, member-owned financial cooperative, is one of Colorado’s oldest credit unions. It offers personal banking services, including checking, savings, auto loans, mortgages, and mobile/online banking.
No. 56
Years named: 1
Founded: 1936
Headquarters: Yuma, Colorado
Employees: 175, with 165 in Colorado
Facts: Smithfield Foods is the world’s largest hog producer and pork processor.
No. 57
Years named: 2
Founded: 1925
Headquarters: Longmont
Employees: 267
Facts: BC Services offers payment resolution and collection services to utility companies, financial service providers, government agencies, commercial entities, and healthcare organizations.
No. 58
Years named: 1
Founded: 2022
Headquarters: Frederick
Employees: 473, with 120 in Colorado
Facts: Heat Tech Industrial specializes in “soft trades” and thermal systems, including mechanical insulation, scaffolding, specialized coatings, and EPC (engineering, procurement, and construction) heat trace systems. It serves sectors like oil & gas and power generation.
No. 59
Years named: 2, 1 consecutive
Founded: 2006
Headquarters: Broomfield
Employees: 210
Facts: Cerapedics develops and markets synthetic bone graft products designed to accelerate bone repair.
No. 60
Years named: 1
Founded: 2009
Headquarters: Milwaukee, Wisconsin
Employees: 316, with 50 in Colorado
Facts: Interstate Parking provides managed parking solutions, including automated systems, real-time analytics, and advanced booking.
No. 61
Years named: 1
Founded: 1986
Headquarters: Loveland
Employees: 187
Locations: 16
Facts: Good Day Pharmacy offers personalized, patient-focused care, including traditional prescriptions, compounding, and free home delivery.
No. 62
Years named: 1
Founded: 1969
Headquarters: Lakewood
Employees: 399
Facts: Red Rocks Community College offers over 150 programs and 650 courses, including 2-year degrees (Associate of Arts/Science/Applied Science) and certificates in fields such as health, technology, and the arts, with a focus on career-relevant education and transfer options to 4-year schools.
