STM Group (UK) Limited
Registered name: STM GROUP (UK) LIMITED
STM Group (UK) Limited made £40.2m revenue and £228k profit in the year to 31 Aug 2025.
STM Group (UK) Limited’s revenue was £40.2m in the year to 31 Aug 2025, with £228k profit and 1,085 employees. The company is classified under “private security activities” and is based in London; we hold 5 years of its filed accounts.
- Status
- Active
- Location
- London, London
- Age
- 21 yrs · since 2005
- Type
- Private Limited Company
Key figures
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 31 Jan 2022 | 31 Jan 2023 | 31 Jan 2024 | 31 Aug 2024 | 31 Aug 2025 |
|---|---|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||||
| Revenue (turnover) | £25.4m | £25.5m | £32.2m | £24.2m | £40.2m |
| Cost of sales | £21.4m | £20.8m | £27.4m | £19.5m | £33.8m |
| Gross profit | £3.9m | £4.6m | £4.8m | £4.7m | £6.4m |
| Operating profit | −£396k | £295k | −£302k | £802k | £304k |
| Profit before tax | −£389k | £303k | −£300k | £807k | £309k |
| Profit after tax | −£483k | £303k | −£304k | £512k | £228k |
| Profit (best available) | −£483k | £303k | −£304k | £512k | £228k |
| Staff costs | £21.5m | £19.4m | £25m | £18m | £31.2m |
| Employees (average) | 920 | 825 | 925 | 1,132 | 1,085 |
| Ratios | |||||
| Profit margin | −1.9% | 1.2% | −0.9% | 2.1% | 0.6% |
| Gross margin | 15.6% | 18.2% | 14.9% | 19.6% | 15.9% |
| Revenue per employee | £27.6k | £30.9k | £34.8k | £21.4k | £37k |
| Profit per employee | −£525 | £367 | −£328 | £452 | £210 |
| Growth (year on year) | |||||
| Revenue growth | — | ▲0.5% | ▲26.3% | — | — |
| Profit growth | — | — | ▼200.3% | — | — |
| Headcount growth | — | ▼10.3% | ▲12.1% | — | — |
| Balance sheet — indirect signals, not revenue | |||||
| Cash at bank | £3 | £1.1k | £462k | £1.1m | £66 |
| Net assets | −£123k | £180k | −£124k | £388k | £616k |
| Fixed assets | £318k | £293k | £285k | £322k | £276k |
| Current assets | £6.1m | £7.9m | £10.4m | £9.4m | £10.2m |
| Debtors | £3.2m | £4.2m | £6m | £4m | £6.1m |
| Deferred income | £1.1m | £838k | £1.9m | £57k | £108k |
| Source | Accounts · bulk data Mar 2024 | Accounts · bulk data Mar 2024 | FullAccounts · bulk data Feb 2025 | FullAccounts · bulk data Feb 2025 | FullAccounts · bulk data May 2026 |
How the business works
- Profit margin
- 0.6%
- Profit ÷ revenue.
- Gross margin
- 15.9%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £37k
- Revenue ÷ average employees.
- Profit per employee
- £210
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 0.7%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 0.3%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 15.2%
- Money owed by customers. Low = customers pay quickly.
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 £616k
- Cash at bank
- —
- Now £66
- Headcount
- —
- Now 1,085
- Deferred income
- —
- Now £108k
- Fixed assets
- —
- Now £276k
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
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Sources
Latest figures from FullAccounts for the year to 31 Aug 2025 (profit £228k), from the Companies House accounts bulk data published May 2026. Spotted an error? Request a correction.
Updated from Companies House on 13 Oct 2026
Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.