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Company No. 14191977 · Incorporated 23 Jun 2022

Greencastle Solutions (UK) Limited

Registered name: GREENCASTLE SOLUTIONS (UK) LIMITED

Part of Blackwater Capital Holdings Limited group

Greencastle Solutions (UK) Limited made £20.1m revenue and £12.9k profit in the year to 30 Sep 2025.

Greencastle Solutions (UK) Limited’s revenue was £20.1m in the year to 30 Sep 2025, with £12.9k profit and 80 employees. The company is classified under “other business support service activities” and is based in Harrow; we hold 3 years of its filed accounts.

Full P&L filedSection N · Administrative and support servicesSIC 82990Other business support service activities n.e.c.
Status
Active
Location
Harrow, London
Age
4 yrs · since 2022
Type
Private Limited Company

Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently.

Latest accounts · year to 30 Sep 2025

Key figures

Young and profitableCash flow filed
Revenue
£20.1m
Growth —
Profit
£12.9k
Growth —
Profit margin
0.1%
 
Employees
80
Change —
Profit / employee
£162
Revenue/employee £251k
Profitable streak
2yrs
Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

3 filed years

Financial history

Multi-year financials, oldest to newest
Year to30 Jun 202330 Sep 202430 Sep 2025
DisclosureNo P&LFull P&LFull P&L
Profit & loss
Revenue (turnover)—£13.7m£20.1m
Operating profit—£28.1k£14.9k
Profit before tax—£28.1k£17.3k
Profit after tax—£21.1k£12.9k
Profit (best available)—£21.1k£12.9k
Staff costs—£13.7m£20m
Employees (average)—10380
Ratios
Profit margin—0.1%0.1%
Revenue per employee—£133k£251k
Profit per employee—£205£162
Cash conversion—1980%−7947%
Balance sheet — indirect signals, not revenue
Cash at bank—£123k£725k
Net assets£100£21.2k£34.1k
Current assets—£2.2m£3m
Debtors—£0£24k
Deferred income—£4.4k£37k
Cash from operations—£556k−£1.2m
SourceFullAccounts · bulk data Mar 2024FullAccounts · bulk data Jun 2026FullAccounts · bulk data Jun 2026
Derived from the latest filing

How the business works

Profit margin
0.1%
Profit ÷ revenue.
Gross margin
—
Gross profit ÷ revenue. High for software and services.
Revenue per employee
£251k
Revenue ÷ average employees.
Profit per employee
£162
Profit ÷ average employees.
Cash conversion
−7947%
Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue
—
Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue
0.2%
Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue
0.1%
Money owed by customers. Low = customers pay quickly.
Indirect — not revenue

Balance-sheet signals

Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.

Net assets
—
Now £34.1k
Cash at bank
—
Now £725k
Headcount
—
Now 80
Deferred income
—
Now £37k
Fixed assets
—
Now —

Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.

Corporate ownership

Group structure

Ownership chain

  1. Blackwater Capital Holdings Limited (registered outside the UK register)ultimate parent75–100%
  2. Greencastle Holdings Limited75–100%
  3. Greencastle Solutions (UK) Limitedthis company

Bands show the share of ownership each company holds in the one below it.

Sister companies (14)

From the Persons with Significant Control register (corporate controllers only).

Same industry, similar size

Similar profitable businesses

Industry benchmarks →

Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 30 Sep 2025 (profit £12.9k), from the Companies House accounts bulk data published Jun 2026. Spotted an error? Request a correction.

Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.