Montana business entity information is available through the Montana Secretary of State business search. This service lets you search by entity name or file number and returns the core identifiers needed for onboarding, compliance verification, and business transactions: entity name, type, number, and the date field appropriate to the record type.

Below, we walk through how to search the portal, where each field lives, and the labels Montana uses for them. Portal labels and available filters can change, so confirm the current interface directly when you search.

Summary table: finding your Montana entity information

Montana labels the date field differently depending on the entity category, so use the table below to match what you see in the portal.

How to search for Montana business entities

Go to the Montana Secretary of State business search and enter your business name, exactly as registered, or the entity's file number in the search field.

Searching by file number delivers an exact match when you already know the entity's identifier. Name searches can return a limited result set, so use the search page's filtering options to narrow results when researching a common business name or conducting due diligence on multiple similarly named entities.

For agent research, the Secretary of State publishes a commercial registered agent list with each agent's Montana address and contact details on file.

Click the entity name in the results to open that entity's record and review the available filed documents.

Fields documented in the Business Services Catalog

The Montana SOS Business Services Catalog documents entity record fields, and the field set varies by entity category:

• Corporations: Business Entity Number, Business Entity Name, Business Entity Type, Business Entity Sub Type, Incorporation Date (domestic) or Qualification Date (foreign), and Entity Status Description (values include Active Good Standing, Active Pending, and Inactive Withdrawn).

• LLCs: the same core fields, but with Organization Date in place of Incorporation Date for the domestic entity, plus a separate Montana qualification field for a foreign LLC.

• Limited partnerships: Formation Date for the domestic entity, with a separate foreign registration date field.

• Assumed business names: Registration Date in place of a formation or incorporation date.

A standalone Commercial Registered Agent List is also published.

How to find your entity number in Montana

Your Montana entity number is the identifier the Secretary of State uses for your filings. The search interface calls it a file number; the Business Services Catalog documents the same field as "Business Entity Number."

Where to locate your Montana entity number:

• Montana business search (fastest method): The catalog labels the field "Business Entity Number"; the search interface calls it a file number.

• Certificate of Organization or Incorporation: The number typically appears on your filed formation document; confirm against your specific certificate.

• Annual reports and state correspondence: If the entity has filed an annual report, the identifier should also appear on that filing or the related correspondence.

Third-party guides describe Montana entity numbers as a letter prefix followed by 6 to 7 digits. The Business Services Catalog documents Business Entity Number as a field but does not establish that visual pattern as an official specification. Do not infer entity type from an identifier's appearance. Verify the number against the official entity record, or confirm with the Business Entity office at (406) 444-3665.

How to find your entity type in Montana

Montana's business entity records use "Business Entity Type" and "Business Entity Sub Type" fields, covering categories such as domestic and foreign LLCs, profit and nonprofit corporations, PLLCs, professional corporations, LPs, LLPs, and assumed business names, among other record types the catalog documents.

Where to find your Montana entity type:

• Montana business search (most accessible): Displayed in search results and on the entity detail page.

• Certificate of Organization or Incorporation: The entity type also appears on your filed formation document.

• Annual reports: Your entity type appears with your entity's information when you file.

The Montana SOS Help Center describes a PLLC as a professional LLC for licensed professions, distinct from a standard LLC used for general businesses, per its current guidance. Converting an entity from one type to another, for example LLC to corporation, generally requires filing Articles of Conversion, subject to the applicable entity statute and current SOS filing instructions.

How to find your formation date in Montana

The date field that applies to your entity depends on the record type, and the label follows the entity's category rather than the page you view it on.

Where your Montana date field appears:

• Montana business search (easiest access): Domestic corporations display "Incorporation Date"; domestic LLCs display "Organization Date"; domestic limited partnerships display "Formation Date"; assumed business names display "Registration Date." Foreign entities display a separate Montana "Qualification Date" alongside the entity's formation information from its home jurisdiction.

• Certificate of Organization or Incorporation: The filed date also appears on your formation document.

Formation date vs. effective date

Montana allows businesses to specify a future effective date when filing, which can create two different dates: the date the Secretary of State filed your formation document, and the date the filing takes effect, if you specified a later date.

For corporations, MCA 35-14-123 allows a delayed effective date up to 90 days after filing, with the document taking effect at 12:01 a.m. on the specified date if no time is stated; this general rule is subject to certain exceptions stated elsewhere in the same section. For LLCs, MCA 35-8-201(2) provides that an LLC's existence begins when the articles of organization are filed unless a delayed effective date is specified.

Let Discern handle your ongoing Montana compliance

You've got what you need from Montana's system: business name, entity type, entity number, and the applicable date field. Put those details into Discern and we file your Montana annual reports on time, track Montana business tax deadlines, and act as your registered agent so state notices reach you electronically.

For teams with entities in more than one state, Discern files annual reports for every jurisdiction where your entities are registered from one dashboard, provides registered agent service in each of those states, and keeps a single set of entity records for the whole portfolio.

Book a demo with Discern to see how it works for your portfolio.