---
title: How to Map a UK Company Group Structure Before a Deal
description: "How to map a UK target's group structure before a deal: PSC chains, subsidiaries, directors, charges, property, CCJs and ID verification."
image: https://www.probedigital.co.uk/hubfs/Programmer_Using_Keyboard_To_Write_Code_original_3754731-1.jpg
---
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# How to Map a UK Company Group Structure Before a Deal
[By \- James Sharpe,](https://www.probedigital.co.uk/blog/author/james-sharpe) Oct 13, 2026
***To map a UK company's group structure before a deal, start with the target entity, trace its ownership up the PSC register until every chain ends with a person, map its subsidiaries and sister companies, then layer on directors, charges, property, judgments and identity verification.***
For an in-house corporate development team, the company named on the share purchase agreement is rarely the whole story. The trading business may lease its premises from a sister company. The valuable intellectual property may sit in a holding company. A lender may hold a charge over assets you assumed were unencumbered. And the people who really control the business may sit two or three corporate layers above the seller you have been negotiating with.
This matters more when each deal carries more weight. The Office for National Statistics' provisional figures show UK companies acquired 130 other UK businesses in April to June 2026, down from 241 a year earlier, while the value of those deals rose to £4.2 billion from £3.4 billion ([ONS, 1 September 2026](https://www.ons.gov.uk/businessindustryandtrade/changestobusiness/mergersandacquisitions/bulletins/mergersandacquisitionsinvolvingukcompanies/apriltojune2026)). Fewer, larger deals leave less room for surprises in the structure underneath.
This guide sets out an eight-step method for mapping a UK target's group, followed by a pre-signing checklist and answers to common questions.
## Why group structure matters in an acquisition
Assets, liabilities, contracts and people are spread across legal entities for good reasons: tax, financing, regulation, history. Due diligence that looks only at the target entity can miss:
- **Assets held elsewhere.** Property, brands or key contracts owned by a company outside the perimeter you are buying.
- **Security across the group.** Charges granted by subsidiaries or cross-guarantees that bind the target to the debts of its affiliates.
- **Control you did not expect.** An owner several layers up whose identity, other interests or reputation changes the risk of the deal.
- **Connected failures.** Directors and shareholders whose other companies have entered insolvency or attracted judgments.
A group map turns these from late-stage surprises into early questions for the seller.
## How to map a UK group structure in eight steps
### Step 1: Fix the target entity
Start with the company number, not the trading name. Confirm the registered name, status, incorporation date, registered office and accounts category. Note any previous names. Trading names and brands often belong to a different company from the one you expected, so tie every name in the information memorandum to a specific registered entity.
### Step 2: Trace ownership up the PSC register
Under Schedule 1A of the Companies Act 2006, a person with significant control is someone who holds, directly or indirectly, more than 25% of the shares or more than 25% of the voting rights, holds the right to appoint or remove a majority of the board, or has the right to exercise, or actually exercises, significant influence or control ([legislation.gov.uk](https://www.legislation.gov.uk/ukpga/2006/46/schedule/1A/part/1)).
Where the PSC is a company rather than a person, open that company's record and repeat. Keep going until every chain ends with individuals, a listed company, or an overseas entity you will need to research separately. Record the percentage bands at each level, and compare the PSC entries with the latest confirmation statement shareholder list. Gaps between the two are worth raising with the seller.
### Step 3: Map down and across the group
Now work the other way. Identify the companies the target controls, and the sister companies that share its parent. Group accounts, where filed, will list principal subsidiaries. Look for dormant companies, dissolved entities and companies with the same registered office. Agree with your deal team which entities are inside the perimeter and which stay with the seller, and write it down.
### Step 4: Map sideways through the directors
List every director and PSC across the group, then review their other appointments, current and resigned. Patterns to look for include short-lived companies, repeated insolvencies, shared addresses and appointments that overlap with your target's customers, suppliers or competitors. This is where undisclosed related-party relationships often show up.
### Step 5: Layer on charges
Pull the charges register for every company in the group, not just the target. A charge must be delivered to Companies House within 21 days beginning with the day after its creation ([s859A](https://www.legislation.gov.uk/ukpga/2006/46/section/859A)). If it is not, the security is void against a liquidator, administrator or creditor of the company, and the money it secured becomes payable immediately ([s859H](https://www.legislation.gov.uk/ukpga/2006/46/section/859H)). Check which charges are outstanding, who holds them and which assets they cover, and match them to the debt the seller has disclosed.
### Step 6: Find where the property sits
Establish which entity owns each site the business uses. Freeholds sometimes sit in a sister company, or with the owners personally, and are leased back to the trading business. Where property is held by an overseas company, the Register of Overseas Entities applies: overseas entities that bought UK land on or after 1 January 1999 in England and Wales, or on or after 8 December 2014 in Scotland, must register and declare their beneficial owners or managing officers ([ACCA](https://www.accaglobal.com/uk/en/technical-activities/uk-tech/in-practice/2022/august/register-overseas-entities.html)). Missing registrations can restrict buying, selling, leasing or charging that land.
### Step 7: Check judgments and filing discipline
Search for county court judgments against each group company and note whether they were satisfied. Review filing history for late accounts, late confirmation statements and repeated changes of auditor or accounting reference date. One late filing is rarely decisive. A pattern across the group is a reason to look harder at controls and cash.
### Step 8: Confirm identity verification status
Under the Economic Crime and Corporate Transparency Act 2023, identity verification became a legal requirement on 18 November 2025, with a 12-month transition period for existing directors and PSCs to verify by their individual due dates. Failing to comply is an offence, and a company whose officers have not verified cannot make filings ([Companies House](https://changestoukcompanylaw.campaign.gov.uk/identity-verification/)). If completion requires new appointments or a confirmation statement, an unverified officer can hold it up. Ask for verification status for every director and PSC in the group.
## Pre-signing checklist: group structure
1. Every entity in the perimeter is identified by company number.
2. Every PSC chain ends with individuals, a listed company or a researched overseas entity.
3. PSC entries reconcile with the latest shareholder list.
4. Subsidiaries, sister companies and dormant entities are listed, with a clear in or out decision.
5. Directors' other appointments have been reviewed for failures and conflicts.
6. Outstanding charges across the group match disclosed debt.
7. The owner of each operational site is confirmed, including overseas owners.
8. CCJs and filing history have been checked for every group company.
9. Identity verification status is confirmed for directors and PSCs.
10. The map is re-run shortly before signing and again before completion.
## Where group maps usually go wrong
### The chain stops at a corporate owner
A PSC entry naming a company is a starting point, not an answer. If the chain leads offshore, record what you know, what you do not, and what you have asked the seller to provide.
### The map is a snapshot
Officers resign, charges are created and PSCs change between heads of terms and completion. Set a watch on every group company so changes reach you before the signing call, not after.
### Property is treated as a finance question
Who owns the buildings is a structure question first. Settle it in the group map, then let the property and finance workstreams take it forward.
## FAQ
### Is the PSC register enough to identify a target's ultimate owner?
It is the right place to start, but not always the end. Corporate PSCs need tracing through their own records, and overseas owners need separate research. Compare the register with shareholder lists and ask the seller to confirm the chain.
### How far up the group should we trace?
Until every chain ends with individuals, a listed company or an overseas entity you have researched and documented. Stopping at the first corporate shareholder leaves the most important question unanswered.
### Why check charges for subsidiaries and sister companies?
Security and guarantees often run across a group. A charge over a sister company's property can affect a site the target depends on, even if the target itself has no charges.
### When should the group map be refreshed?
At least twice: shortly before signing and again before completion. Monitoring each group company in between is better still.
## Map the group in one view
ProbeDigital is a [corporate intelligence platform](https://www.probedigital.co.uk) that brings UK group structures, PSCs, directors' appointments, charges, CCJs and UK and foreign property ownership into one view, with bulk portfolio checks for larger target lists. Compare [ProbeDigital plans](https://www.probedigital.co.uk/subscription-pricing-0), or read more practical guides on the [ProbeDigital blog](https://www.probedigital.co.uk/blog).
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