How to search Colorado business entities online
Official Resource
Colorado Official SOS WebsiteColorado's business entity database is searchable at coloradosos.gov — Business Entity Search, operated by the Colorado Department of State (the official name of the office; the elected official is the Secretary of State). A single search field accepts a business name, trade name, trademark, entity ID number, or document number — all in one query.
Updated August 2026
New registered agent verification requirement (effective July 1, 2025)
Colorado now requires registered agent identity verification on formation and update filings under House Bill 24-1137, aimed at reducing fraudulent business filings. An individual registered agent must provide a valid Colorado driver's license or ID number tied to a Colorado address, or request a mailed verification passcode as an alternative (passcodes expire after 45 days). An entity acting as registered agent must itself be in good standing with the Department of State and maintain a usual place of business in Colorado. This is a filing requirement rather than a search-tool feature, but it can explain processing delays for entities that have recently changed registered agents.
What the search covers
The database is a single registry covering all entity types filed with the Department of State:
- Profit corporations and nonprofit corporations
- Limited liability companies
- Limited partnerships, limited liability partnerships, limited liability limited partnerships
- Limited cooperative associations and limited partnership associations
- Trade names and trademarks
- Unincorporated nonprofit associations
- Foreign entities of all above types
The search page also displays the date through which paper (mailed or dropped-off) documents have been processed — a rolling indicator of how current paper-filing records are. Online filings post immediately.
Name search tips
The Department publishes search guidance worth knowing before you start:
- Punctuation doesn't help — omit it entirely
- Initials run together as one word: "A.C.E. Computers" is indexed as "ACE Computers"
- "A," "An," and "The" sort as part of the name, not as leading articles: "An Original Company" sorts under "A," not "O"
- Results are alphabetical; if more than 20 match, they paginate — clicking a column header re-sorts
- When a name search yields too many results, try switching to the 11-digit entity ID for a precise single-record lookup
Entity detail page
Each entity record shows the 11-digit entity ID, entity name, current status (Good Standing, Delinquent, Dissolved, or other), entity type, jurisdiction, formation date, principal office address, registered agent name and address, and a list of all filed documents. Filed documents are freely accessible — no account needed, no fee.
Colorado also provides a Certificate of Good Standing lookup at coloradosos.gov — Certificate of Good Standing Search. The certificate is generated online at no charge. Certified copies for formal legal purposes require a mail-in order with a fee.
Email alerts and bulk data
The Department offers free email notification alerts when changes are filed for any entity. Set up alerts at coloradosos.gov — Email Notifications. Complete entity, trademark, and trade name datasets are available for bulk download at no charge through Colorado's open data portal, the Colorado Information Marketplace, at data.colorado.gov.
This guide is informational only and is not affiliated with the Colorado Department of State. Verify current procedures at the official state website. Last verified: August 2026.