Businesses in Thornton, Colorado

As of October 12, 2026, ListRiver's records show 11,605 active registered businesses in Thornton, Colorado, the 19th most among Colorado cities. 84% are LLCs. 204 were formed in September 2026. That is 1% of all Colorado businesses on record.

From official Colorado registry records, updated weekly. Most Thornton businesses are in Adams County. Look up a Colorado business by name.

Businesses on record
11,605
Formed in the last 12 months
2,526
Formed in September
204
With a phone number
4%
466 records

New Thornton businesses per month

0150300Oct 2024: 88Oct 24Nov 2024: 69Dec 2024: 74Jan 2025: 1312025Feb 2025: 83Mar 2025: 122Apr 2025: 94May 2025: 85Jun 2025: 75Jul 2025: 73Aug 2025: 213Sep 2025: 149Oct 2025: 162Nov 2025: 164Dec 2025: 185Jan 2026: 2522026Feb 2026: 176Mar 2026: 257Apr 2026: 238May 2026: 244Jun 2026: 205Jul 2026: 217Aug 2026: 222Sep 2026: 204

Businesses on record by formation month, through September 2026. Monthly Colorado new-business reports · Get the list of 204 new businesses formed in September 2026

Entity types

  • LLCs9,799 · 84%
  • Corporations1,234 · 11%
  • Nonprofits490 · 4%
  • LLPs37 · 0%
  • Limited partnerships32 · 0%
  • Other13 · 0%

Top ZIP codes

Newest business names registered in Thornton

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BusinessCityTypeFormed
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Name hiddenThorntonCorporationOct 2026
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Name hiddenThorntonLLCOct 2026
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Name hiddenThorntonLLCOct 2026
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Name hiddenThorntonCorporationOct 2026
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Common questions about Thornton businesses

How many businesses are registered in Thornton, Colorado?

ListRiver has 11,605 active registered businesses in Thornton, Colorado on record as of October 12, 2026, from official Colorado business registry data. Dissolved and defunct businesses are not counted.

How many new businesses were formed in Thornton, Colorado in September 2026?

204 businesses on record in Thornton, Colorado were formed in September 2026.

How many new businesses opened in Thornton, Colorado in the last 12 months?

2,526 businesses on record in Thornton, Colorado were formed in the 12 months through September 2026.

What is the most common type of business in Thornton, Colorado?

LLCs are the most common: 9,799 of 11,605 businesses on record (84%), followed by Corporations with 1,234 (11%).

Where does this data come from?

From Colorado's official business registry. ListRiver loads each new state file, standardizes it, removes duplicates and updates its database weekly. Email and industry details are added from SMBCredit.net where available.

How do I get a list of businesses in Thornton, Colorado?

Use ListRiver's list builder to filter Thornton, Colorado businesses by entity type, formation date, industry and contact details, see the exact count and price, and download a CSV. Every list includes monthly refresh files.

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About this data

Counts come from official Colorado business registry records on file with ListRiver, current as of October 12, 2026. They include businesses that are active on the state register; dissolved and defunct entities are excluded. Contact details are added from SMBCredit.net where available. Formation months reflect the registration date the state reports. See the methodology for sources, update schedules and known limits.