Look up a company by number

    EIN number search (United States)

    Source-cited registry guidance — access and document fees vary by source.

    Search Company Records in United States

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

    How do I look up a company by its registration number in United States?

    Use the exact EIN with its issuing jurisdiction or register on SEC EDGAR. Compare the returned legal name and identifier. A valid-looking number does not guarantee a result: coverage, formatting, access and source availability affect the lookup.

    Step-by-step

    1. 1

      Find the EIN on the paperwork

      The EIN normally appears on invoices, contracts, the website footer or official correspondence. It is the number counterparties are required to quote.

    2. 2

      Search the EIN

      Preserve leading zeros, letters, court and jurisdiction information. Follow the source's documented format rather than removing meaningful parts to force a match.

    3. 3

      Confirm the returned entity

      Check the legal name on the returned record matches the name on your paperwork. A mismatch between quoted number and quoted name is a serious warning sign.

    4. 4

      Verify at SEC EDGAR

      For anything contractual, confirm the number against the primary source at https://www.sec.gov/edgar.

      https://www.sec.gov/edgar
    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

    What is a EIN in United States?

    It is the identifier SEC EDGAR assigns to a registered entity. It stays with the entity even if the trading name changes, which makes it the reliable way to track a company over time.

    Is a EIN lookup free?

    LemReveal's basic lookup is free where supported. Check SEC EDGAR's official access rules for the record or document required.

    What if the EIN returns no result?

    Check the format, issuing jurisdiction, coverage and source availability. Preserve meaningful prefixes and leading zeros. An unavailable source is not a confirmed absence; ask the counterparty to clarify the identifier.

    Should I use the EIN or the company name?

    The EIN. Names are duplicated across entities within a group; the number is unique to one entity.

    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 look up a company by its 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.

    Related guides and tools

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