UK Company Data API: Companies House Register

Search over 5 million UK companies from the official Companies House register. Filter by SIC code, status, location, company type and incorporation date. Get company number, name, registered address, accounts, mortgages, SIC codes and previous names as clean JSON.

No scraping. Companies House publishes its register as a monthly bulk file for direct download. This Actor downloads the published archive, streams it, filters and normalises it — no browser, no proxy, no selectors to break.

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What you get

One dataset item per company:

Group	Fields
Identity	company number, name, status, legal category, country of origin
Dates	incorporation date, dissolution date (ISO-8601)
Registered address	care of, PO box, line 1, line 2, town, county, country, postcode
Accounts	reference day and month, next due date, last made up date, account category
Confirmation statement	next due date, last made up date
Mortgages	charges, outstanding, part satisfied, satisfied
SIC codes	up to four codes, each split into code and description
Previous names	up to ten former names with the date of change
Provenance	register snapshot date, licence, attribution

Every row carries the licence and the attribution string, because the Open Government Licence requires it.

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Sample output

Real row, from the September 2026 register snapshot:

{
  "companyNumber": "16092999",
  "companyName": "!ABRIDGE TAX LTD",
  "status": "Active",
  "category": "Private Limited Company",
  "countryOfOrigin": "United Kingdom",
  "incorporationDate": "2024-11-21",
  "dissolutionDate": null,
  "registeredAddress": {
    "careOf": null,
    "poBox": null,
    "line1": "82 GREAT NORTH ROAD",
    "line2": "GREAT NORTH BUSINESS CENTRE",
    "postTown": "HATFIELD",
    "county": null,
    "country": "UNITED KINGDOM",
    "postCode": "AL9 5BL"
  },
  "accounts": {
    "accountRefDay": 30,
    "accountRefMonth": 11,
    "nextDueDate": "2027-08-31",
    "lastMadeUpDate": "2025-11-30",
    "category": "MICRO ENTITY"
  },
  "confirmationStatement": { "nextDueDate": "2026-12-04", "lastMadeUpDate": "2025-11-20" },
  "mortgages": { "charges": 0, "outstanding": 0, "partSatisfied": 0, "satisfied": 0 },
  "sicCodes": [
    { "code": "62020", "description": "Information technology consultancy activities" }
  ],
  "previousNames": [
    { "name": "BLUECASE LTD", "changedOn": "2026-03-27" }
  ],
  "companyUri": "http://business.data.gov.uk/id/company/16092999",
  "source": {
    "provider": "UK Companies House",
    "snapshot": "2026-09-01",
    "licence": "Open Government Licence v3.0"
  }
}

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Usage

Recent IT consultancies

{
  "sicCodes": ["62020"],
  "activeOnly": true,
  "incorporatedAfter": "2026-01-01",
  "maxItems": 2000
}

Look up specific companies

{
  "companyNumbers": ["08209948", "09446231"]
}

The fastest path: the Actor still scans the register, but it emits only what you asked for.

Companies in a city, by postcode

{
  "postcodePrefix": "M",
  "status": ["Active"],
  "maxItems": 5000
}

Companies that changed their name

{
  "hasPreviousNames": true,
  "activeOnly": true,
  "incorporatedAfter": "2025-01-01"
}

A rename is often the signal you want in due diligence: a company that has already traded under another identity.

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Filters

Field	Notes
sicCodes	UK SIC 2007 codes. Matches if any of the company's four codes is listed
sicText	Free-text match on the SIC description instead of the code
companyNumbers	Exact lookups
status	Register status values, e.g. Active, Dissolved, Liquidation
activeOnly	Shortcut for status: ["Active"]
category	Private Limited Company, PLC, LLP, Limited Partnership…
postcodePrefix	Postcode prefix, spaces ignored
postTown	Registered town, substring match
nameContains	Company name, substring match
incorporatedAfter / incorporatedBefore	ISO dates
hasPreviousNames	Only companies that have traded under another name
maxItems	Hard cap on returned companies

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Pricing

Event	Charged	Covers
register-scan	once per run	downloading and parsing the published register archive
company-record	once per company returned	the normalised company record

The scan is a fixed cost per run — roughly 490 MB of archive, read every time — which is why it is charged once rather than folded into the per-company price. After that you pay only for what you keep.

A narrow run that returns 100 companies costs about $0.10 + $0.10. A run returning 5,000 costs about $5.10. maxItems is the lever: it caps the per-company part and nothing else.

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Reliability

• The source is a monthly published archive, not a web page. No browser, no anti-bot handling, no selectors.
• The file format has been stable for years: 55 fixed columns.
• If this month's file is not published yet, the Actor reads the download index and falls back to the most recent snapshot rather than failing.
• Every row carries the snapshot date, so you always know how fresh the data is.

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Notes and limits

• Results come in register order, not a random sample. The published archive is split into seven parts and the Actor reads them in order, stopping as soon as maxItems is reached. With a low cap you therefore get the first N matches alphabetically by company name, not N matches drawn from the whole register. If you need full coverage of a filter, leave maxItems generous — the register scan is charged once per run, so a bigger cap costs you only the extra per-company records.
• The register is a snapshot. It reflects Companies House's data as of the first of the month, not real time. If you need a filing within minutes of it landing, use the Companies House API instead.
• The header of the published file is not clean — several column names carry leading spaces, including CompanyNumber. This Actor strips them. If you parse the file yourself, that will bite you.
• Financial figures are not included. The bulk product carries registration data and filing dates, not the numbers inside the accounts.
• Company names are as registered, including oddities like the leading ! in the sample above.
• Attribution is required. Contains public sector information licensed under the Open Government Licence v3.0.

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Data source

Companies House publishes a monthly bulk data product covering the whole UK register. It is Crown copyright, available under the Open Government Licence v3.0, which permits commercial use including redistribution inside a product, provided the source is acknowledged. This Actor acknowledges it on every output row.

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Support

Found a field that should be exposed, or a filter you need? Open an issue on this Actor's Issues tab.