Gem Security Services LimitedDissolved
Registered name: GEM SECURITY SERVICES LIMITED
Part of Johnson Controls International Plc groupGem Security Services Limited made £500k revenue and £55k profit in the year to 30 Sep 2024.
Gem Security Services Limited’s revenue was £500k in the year to 30 Sep 2024, with £55k profit and 6 employees. The company was classified under “other service activities” and was based in Sunbury-on-Thames; we hold 4 years of its filed accounts. It is no longer on the Companies House register.
- Status
- Dissolved
- Last location
- Sunbury-on-Thames, London
- Age
- 36 yrs · since 1990
- 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.
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 | 30 Sep 2023 | 30 Sep 2024 |
|---|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | £448k | £591k | £332k | £500k |
| Cost of sales | £279k | £284k | £209k | −£296k |
| Gross profit | £169k | £307k | £122k | £204k |
| Operating profit | — | — | — | £62k |
| Profit before tax | −£107k | £84.7k | −£12.4k | £73k |
| Profit after tax | −£106k | £74.3k | −£12.4k | £55k |
| Profit (best available) | −£106k | £74.3k | −£12.4k | £55k |
| Employees (average) | 9 | 7 | 6 | 6 |
| Ratios | ||||
| Profit margin | −23.7% | 12.6% | −3.8% | 11% |
| Gross margin | 37.7% | 52% | 36.9% | 40.8% |
| Revenue per employee | £49.8k | £84.4k | £55.3k | £83.3k |
| Profit per employee | −£11.8k | £10.6k | −£2.1k | £9.2k |
| Growth (year on year) | ||||
| Revenue growth | — | ▲31.8% | — | — |
| Headcount growth | — | ▼22.2% | — | — |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £123k | £149k | £22.4k | — |
| Net assets | −£17.8k | £56.5k | £44k | — |
| Fixed assets | £7k | £5.7k | £4.8k | — |
| Current assets | £231k | £285k | £245k | — |
| Debtors | £63k | £126k | £55.1k | — |
| Source | Accounts · bulk data Oct 2023 | Accounts · bulk data Oct 2023 | FullAccounts · bulk data Jun 2024 | Accounts · bulk data Sep 2025 |
How the business works
- Profit margin
- 11%
- Profit ÷ revenue.
- Gross margin
- 40.8%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £83.3k
- Revenue ÷ average employees.
- Profit per employee
- £9.2k
- Profit ÷ average employees.
- Cash conversion
- —
- 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
- —
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- —
- 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 —
- Cash at bank
- —
- Now —
- Headcount
- —
- Now 6
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Johnson Controls International Plc (registered outside the UK register)ultimate parent75–100%
- Tyco Holdings (U.K.) Limited75–100%
- Adt Fire and Security PLC75–100%
- Computerised and Digital Security Systems Limited75–100%
- Gem Security Services Limitedthis company
Bands show the share of ownership each company holds in the one below it.
From the Persons with Significant Control register (corporate controllers only).
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Sources
Latest figures from accounts for the year to 30 Sep 2024 (profit £55k), from the Companies House accounts bulk data published Sep 2025. Spotted an error? Request a correction.
Updated from Companies House on 20 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.