Montana— USA

Companies in Montana

385.2K companies registered in Montana, sourced from official business registers and enriched with industry, size, location and contact data. Below: the largest companies by reported revenue, and how the Montana business base breaks down by industry and headcount.

385.2K

companies

#37

of 50 states

0.6%

of US records

industries ranked

September 2026

data updated

Part of the United States company directory.

Rankings

Largest companies in Montana

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

#	Company	Industry	City	Revenue (USD)	Employees
1	Fair Isaac Corporation	Other business support service activities n.e.c.	Bozeman	$2B	3,811
2	First Interstate Bank	Other monetary intermediation	Billings	$1.5B	3,267
3	Glacier Bancorp, Inc.	Other monetary intermediation	Kalispell	$1.4B	4,188
4	First Interstate Bancsystem, Inc.	Other monetary intermediation	Billings	$1.4B	3,376
5	Glacier Bank	Other monetary intermediation	Kalispell	$1.3B	3,433
6	Billings Clinic	General medical practice activities	Billings	$924M	3,300
7	Upper Missouri G & T Electric Co-Operative Inc	Electric power generation, transmission and distribution	Sidney	$914M	2
8	Benefis Health System, Inc	Hospital activities	Great Falls	$663M	94
9	Kalispell Regional Medical Center, Inc.	Hospital activities	Kalispell	$637M	3,100
10	Benefis Hospitals, Inc	Hospital activities	Great Falls	$623M	2,419
11	Benefits Hospital	Hospital activities	Great Falls	$604M	1
12	Bozeman Health Deaconess Hospital	Hospital activities	Bozeman	$588M	8
13	Montana State University	Tertiary education	Bozeman	$588M	2,500
14	Scl Health - Montana	Hospital activities	Billings	$546M	1,800
15	EPC Services Company	Engineering activities and related technical consultancy	Billings	$478M	221
16	Providence Health & Services - Montana	Hospital activities	Missoula	$466M	1,460
17	University of Montana	Tertiary education	Missoula	$388M	2,450
18	Stockman Bank of Montana	Other monetary intermediation	Miles City	$375M	821
19	Robert Caldwell MD Psychiatry	General medical practice activities	Helena	$370M	1
20	St. Peter's Health	Hospital activities	Helena	$334M	1,700
21	Kampgrounds of America, Inc.	Legal activities	Billings	$185M	830
22	Great Falls Public Schools Dist1	Primary education	Great Falls	$149M	1,768
23	Missoula County Public Schools	Primary education	Missoula	$137M	1,500
24	Xtant Medical Holdings, Inc.	Manufacture of pharmaceutical preparations	Belgrade	$134M	151
25	St James Healthcare, Inc	Hospital activities	Butte	$130M	514

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

Fair Isaac Corporation leads Montana at $2B in reported revenue, from Bozeman.

Coverage

Companies by industry in Montana

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

Other business support service activities n.e.c.8299

16,711

Business and other management consultancy activities7022

16,225

Construction of residential and non-residential buildings4120

13,549

Management of real estate on a fee or contract basis6832

11,450

Mixed farming0150

10,955

Activities of holding companies6420

10,108

Trusts, funds and similar financial entities6430

9,810

Maintenance and repair of motor vehicles4520

8,987

Real estate agencies6831

7,827

Activities of other membership organisations n.e.c.9499

7,819

Other human health activities8690

7,063

Rental and leasing of other personal and household goods7729

6,618

Restaurants and mobile food service activities5610

6,580

Other specialised construction activities n.e.c.4399

6,360

Repair of other personal and household goods9529

6,287

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

Other business support service activities n.e.c. is the largest activity in Montana, with 16,711 companies.

Distribution

Company size

By number of employees.

1-4

352,286

5-9

14,160

10-19

4,611

20-49

2,759

50-99

891

100-199

453

200-499

217

500-999

1000+

9,690 companies have no disclosed headcount (excluded from the chart).

94% of Montana companies with a disclosed headcount fall in the 1-4 employee band.

Data coverage

What a Montana record carries

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

17%

with a website

31%

with a phone number

11%

with an email address

Counted against the 385.2K companies in Montana. Firmographics — industry, size, address, status — are present on every record.

FAQ

Companies in Montana — frequently asked questions

There are 385.2K companies registered in Montana in the InfobelPRO database, across every sector from sole proprietorships to large enterprises.

By revenue reported to the register, the largest company headquartered in Montana is Fair Isaac Corporation, based in Bozeman, in other business support service activities n.e.c..

Other business support service activities n.e.c. (16,711 companies), Business and other management consultancy activities (16,225 companies), Construction of residential and non-residential buildings (13,549 companies) lead the Montana 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 Montana 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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