How to Use OSINT to Investigate UK Companies, Directors and Hidden Business Links
Looking Beyond a Company Website
Using OSINT, there is often far more information available about a company than simply its website and a few listed contact details.
Before starting company research, it is useful to understand the difference between a limited company and a non-limited business.
In simple terms, if you are operating a limited company in the UK, with shareholders and directors, then it must be registered with Companies House.
However, smaller sole trader businesses, the classic “one-man-band” operations often seen in investigative work, do not need to be formally registered as companies in the same way.
Understanding this distinction is important, as it determines where records may exist and what information is publicly available.
Researching UK Limited Companies
One of the primary resources for researching registered UK companies is the official Companies House website. You can search for:
- active limited companies,
- dissolved companies,
- directors,
- filing histories,
- and company officers.
The official search portal is available here:
The database includes:
- active companies,
- companies dissolved since 2010,
- and directorship records linked to those companies.
Additional Company Search Platforms
Several other platforms also provide company information and directorship searches, including:
Some of these services provide limited free access, while others operate as paid intelligence or credit-reference platforms.
CreditSafe can be particularly useful when researching older dissolved companies or identifying historical connections not immediately visible through the standard Companies House search interface.
Researching Dissolved Companies
When using the free Companies House database, investigators should be aware that not all historic company records and directorships are available. In general, companies dissolved prior to 2010 are not fully searchable through the standard platform.
However, additional dissolved company information can still be accessed here:
This resource allows searches for companies dissolved between 1989 and 2009.
In many cases, investigators can request digital copies of submitted company documents. These records have proven valuable in numerous investigations and are generally inexpensive to obtain.
Obtaining a Director’s Full Date of Birth
When carrying out company directorship research, investigators will often notice that a director’s date of birth only displays the month and year. This change was introduced in October 2015 as part of efforts to protect personal information.
However, investigators often require an individual’s full date of birth abd can often still identify a director’s full date of birth by locating older filing documents submitted before the redaction changes took effect.
For example, appointment documents, incorporation filings, or historic officer records may still contain the director’s full date of birth within the scanned filing documents.
This can be particularly useful when attempting to distinguish between individuals with similar names.
Understanding PSCs, Shareholders & Company Control
When researching companies, investigators should not focus solely on directors. In many investigations, the most important individuals connected to a business may not appear as directors at all.
One of the most valuable records available through Companies House is the PSC register.
PSC stands for:
- Person with Significant Control
A PSC is generally someone who:
- owns more than 25% of the shares,
- controls more than 25% of the voting rights,
- or otherwise exercises significant influence or control over the company.
This information can be extremely useful during investigations, helping identify who may actually control or financially benefit from a business. In some cases, investigators will identify:
- spouses or family members listed as PSCs,
- associates holding shares on behalf of others,
- or individuals linked to multiple companies despite not appearing as directors.
Minority Shareholders & Hidden Associations
Whilst PSC records identify individuals with significant control, investigators should also pay attention to minority shareholders recorded within company filings.
Even relatively small shareholdings can reveal useful associations between:
- business partners,
- family members,
- investors,
- or long-term associates.
Historic filings, confirmation statements, and incorporation documents can often reveal:
- changes in ownership,
- movement of shares,
- appointments and resignations,
- or previously unknown relationships between individuals and businesses.
While searching by company or director name is easy in Companies House, searching by shareholder name is more complex. Public Insights aggregates PSC and shareholder records to enable investigators to search by name and identify connections between individuals, businesses, and addresses more efficiently.
Identifying Businesses Operating From an Address
While most companies operate from commercial premises, some businesses are registered to residential addresses. During investigations, it is common to research an address to determine whether any businesses are operating from a subject’s address.
For the UK and many other European Countries there are a number of useful free online resources that you can use.
ICO Register of Data Controllers
One particularly useful UK resource is the Register of Data Controllers operated by the Information Commissioner's Office. This service records Data Protection Act licence holders.
This database allows searches by:
- address,
- postcode,
- or organisation name.
It can reveal businesses registered with the ICO and operating from a specific location.
As most legitimate businesses processing personal data should be registered with the ICO, this can provide useful investigative leads.
VAT Registration Search Tools
VAT search resources can also help identify businesses associated with an address.
Examples include:
These tools may reveal business names, VAT registration numbers, and associated addresses.
International Company Research
For international company investigations, one of the most useful resources is:
This platform aggregates company registration information from multiple jurisdictions and often links directly to the official registration authority in the relevant country.
Another highly valuable investigative resource is:
Maintained by the International Consortium of Investigative Journalists, the database contains information linked to:
- 785,000 offshore companies,
- trusts,
- foundations,
- and individuals connected to datasets such as:
- the Panama Papers,
- Offshore Leaks,
- Bahamas Leaks,
- and Paradise Papers investigations.
Additional Company Research Resources
A broader collection of company research resources can also be found here:
Training Exercise
Exercise 1: Identify a UK Company
Using the free Companies House search service:
Identify the UK registered company with the company number:
- 01525485
Exercise 2: Locate a Director’s Full Date of Birth
View the directors associated with the company identified above.
You will see that Elizabeth Jane BALES has a listed date of birth showing only the month and year.
Now:
- Open the company’s Filing History tab.
- Locate the filing document showing her appointment as a director.
- View the filing document and identify her full date of birth.
Exercise 3: Research Gordon Ramsay
Using the free Companies House search service:
Research chef: Gordon Ramsay
Attempt to identify:
- his full legal name,
- and his full date of birth.
Exercise 4: Search the ICO Register
Using the ICO Register of Data Controllers:
Search:
- your own postcode,
- or the postcode of your workplace,
to identify any businesses associated with that location.
Exercise 5: Search VAT Databases
Using:
Search:
- your own postcode,
- or the postcode of your workplace,
to identify any businesses associated with the address.
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