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Wyoming— USA

Companies in Wyoming

835.6K companies registered in Wyoming, sourced from official business registers and enriched with industry, size, location and contact data. Below: the largest companies by reported revenue, and how the Wyoming business base breaks down by industry and headcount.

835.6K
companies
#25
of 50 states
1.3%
of US records
15
industries ranked
September 2026
data updated

Part of the United States company directory.

Rankings

Largest companies in Wyoming

By reported (actual) revenue, updated September 2026. Public-sector entities are excluded.

#CompanyIndustryCityRevenue (USD)Employees
1Sisecam Wyoming LLCManufacture of other inorganic basic chemicalsGreen River$774M378
2Bridger Pipe Line LLCTransport via pipelineCasper$499M33
3Memorial Hospital of Laramie CountyHospital activitiesCheyenne$466M1,270
4University of WyomingTertiary educationLaramie$315M7,000
5Cheyenne Light Fuel and Power, CompanyElectric power generation, transmission and distributionCheyenne$276M73
6Wyoming Medical Center, Inc.Hospital activitiesCasper$262M1,149
7Natrona County School DistrictPrimary educationCasper$261M1,500
8Golden Tiger HoldingsActivities of holding companiesCheyenne$201M—
9Campbell County Hospital DistrictHospital activitiesGillette$191M1,043
10Powder River Energy CorporationElectric power generation, transmission and distributionSundance$189M269
11Albany County Hospital DistrictHospital activitiesLaramie$150M490
12Memorial Hospital of Sheridan CountyHospital activitiesSheridan$142M422
13Webt InsuranceTrusts, funds and similar financial entitiesCheyenne$136M1
14West Park Hospital DistrictHospital activitiesCody$130M450
15Universal Supply Chain, Inc.Wholesale of coffee, tea, cocoa and spicesCheyenne$129M41
16Laramie County, WyomingAdministration of the State and the economic and social policy of the communityCheyenne$115M325
17Sweetwater County School District 1Primary educationRock Springs$114M1,050
18University of Wyoming FoundationTertiary educationLaramie$114M35
19307 Capital Management, LLCSecurity and commodity contracts brokerageCheyenne$102M6
20North Lincoln County Hospital DistrictHospital activitiesAfton$89M150
21Memorial Hospital of Converse CountyHospital activitiesDouglas$88M380
22High Plains Power, Inc.Electric power generation, transmission and distributionRiverton$81M53
23Teton School District 1Primary educationJackson$79M400
24Lower Valley Energy, Inc.Electric power generation, transmission and distributionAfton$78M65
25Community Foundation of Jackson HoleOther business support service activities n.e.c.Jackson$75M9

Top 25 by revenue reported to the register. Companies filing no revenue figure are not ranked, whatever their size.

Sisecam Wyoming LLC leads Wyoming at $774M in reported revenue, from Green River.

Coverage

Companies by industry in Wyoming

The industries holding the most companies, by NACE activity code.

Activities of holding companies6420
75,139
Trusts, funds and similar financial entities6430
55,697
Business and other management consultancy activities7022
37,947
Other business support service activities n.e.c.8299
24,932
Management of real estate on a fee or contract basis6832
16,388
Combined office administrative service activities8211
14,954
Computer programming activities6201
14,468
Non-specialised wholesale trade4690
13,277
Real estate agencies6831
11,349
Other human health activities8690
9,959
Retail sale of flowers, plants, seeds, fertilisers, pet animals and pet food in specialised stores4776
8,869
Other telecommunications activities6190
7,585
Other transportation support activities5229
7,130
Construction of residential and non-residential buildings4120
6,671
Other information technology and computer service activities6209
5,935

Ranked by number of companies. Each record carries its NACE code alongside SIC and NAICS, so the same segment can be pulled in any of the three schemes.

Browse these directories

Activities of holding companies is the largest activity in Wyoming, with 75,139 companies.

Distribution

Company size

By number of employees.

1-4
749,923
5-9
11,149
10-19
3,801
20-49
2,037
50-99
729
100-199
288
200-499
135
500-999
38
1000+
33

67,471 companies have no disclosed headcount (excluded from the chart).

98% of Wyoming companies with a disclosed headcount fall in the 1-4 employee band.

Data coverage

What a Wyoming record carries

Share of the state's companies holding each contact field.

17%

with a website

22%

with a phone number

10%

with an email address

Counted against the 835.6K companies in Wyoming. Firmographics — industry, size, address, status — are present on every record.

FAQ

Companies in Wyoming — frequently asked questions

There are 835.6K companies registered in Wyoming in the InfobelPRO database, across every sector from sole proprietorships to large enterprises.
By revenue reported to the register, the largest company headquartered in Wyoming is Sisecam Wyoming LLC, based in Green River, in manufacture of other inorganic basic chemicals.
Activities of holding companies (75,139 companies), Trusts, funds and similar financial entities (55,697 companies), Business and other management consultancy activities (37,947 companies) lead the Wyoming business base by number of companies.
Registered name and address, industry classification in NACE, SIC and NAICS, company status and legal form, employee band, reported revenue where filed, and contact fields — website, phone and email — where available.
Yes. The Wyoming file is available as a bulk export or through the API, filtered by industry, company size, city or revenue. Licensing is on volume and use, not per seat.

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