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    How to find a company's registration number in United States

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    Reviewed by LemReveal Research TeamContent reviewed June 2026Primary source: SEC EDGAR

    How do I find a company's registration number in United States?

    Search the company's name on SEC EDGAR at https://www.sec.gov/edgar. The result page shows its registration number — the same identifier that appears on invoices, contracts, and government filings.

    Step-by-step

    1. 1

      Open SEC EDGAR

      Navigate to https://www.sec.gov/edgar.

      https://www.sec.gov/edgar
    2. 2

      Search by company name

      Type the exact trading or legal name. Partial matches usually work; add the city if the name is common.

    3. 3

      Copy the registration number

      The registration number is displayed at the top of the entity profile. It is the authoritative ID for cross-referencing.

    4. 4

      Confirm it's the right entity

      Check the registered address and incorporation date to be sure you have the correct legal entity, especially for groups with similarly named subsidiaries.

    Open SEC EDGARAll United States records

    United States: choosing and checking the right record

    Choose the correct source
    Search the formation state's business register for an LLC or corporation. SEC EDGAR is a securities-disclosure system, not a national list of all US companies. Use the state links on this page to select the right register.
    Confirm the entity
    Save the state and entity/file number together. The same name can exist in multiple states. A foreign qualification is permission to register outside the formation state, not a separate original incorporation.

    Check current access and document options on the official United States company sources site. For search limitations and missing-result guidance, see the United States registry guide.

    Frequently asked questions

    Where is a United States company's registration number published?

    Look for the identifier on the entity's record or available extract in SEC EDGAR (https://www.sec.gov/edgar). Compare it with the counterparty's documentation; publication requirements and identifier labels vary by jurisdiction.

    Is looking up a United States registration number free?

    LemReveal's basic lookup is free. Check SEC EDGAR's current access rules: an official portal can require an account, charge for searches or restrict particular documents.

    How do I look up a US company?

    For public companies, search SEC EDGAR by company name to find filings like 10-K annual reports and 8-K material events. For private companies, you'll need to search the specific state's Secretary of State website where the company is incorporated.

    People also ask about find a company's registration number in United States

    The exact questions searchers type into Google — answered from the primary source.

    Is the United States company register free to search?

    Yes. Basic company lookups on the United States company sources are free — you can search by company name or registration number, view legal status, registered address and (usually) directors at no cost. Some jurisdictions charge a small fee only for downloading full filed documents.

    What is the official United States business registry?

    The United States company sources is the official public register of companies incorporated in United States. It is operated by the government and is the primary source cited on this page — https://www.sec.gov/edgar.

    Where do I find a United States company's registration number?

    Every registered United States entity has a unique registration number issued at incorporation. It appears on invoices, contracts, the company's website footer (often in a "legal" section), and prominently on its United States company sources record.

    Is a United States registration number the same as a VAT number?

    No. The registration number is the identifier issued by the United States company sources when the company was formed. The VAT number is a separate tax identifier issued (only if the company is VAT-registered) by the national tax authority. Many small companies have a registration number but no VAT number.

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