Cambustion Limited
Registered name: CAMBUSTION LIMITED
Part of Fidion Eot Limited groupCambustion Limited made £11.5m revenue and £2.1m profit in the year to 30 Apr 2025.
Cambustion Limited’s revenue grew 10% to £11.5m in the year to 30 Apr 2025, with £2.1m profit and 68 employees. The company is classified under “manufacture of other special-purpose machinery” and is based in Cambridge; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Cambridge, East of England
- Age
- 39 yrs · since 1987
- 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. From the filing: “The Company's immediate parent company and controlling party is Fidion Limited, a company incorporated in England and Wales.”
Key figures
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 30 Apr 2022 | 30 Apr 2023 | 30 Apr 2024 | 30 Apr 2025 |
|---|---|---|---|---|
| Disclosure | Profit & loss | Profit & loss | Profit & loss | Profit & loss |
| Profit & loss | ||||
| Revenue (turnover) | £10.7m | £10.6m | £10.4m | £11.5m |
| Cost of sales | £5m | £5.2m | −£5.5m | −£5.4m |
| Gross profit | £5.7m | £5.4m | £4.9m | £6.1m |
| Operating profit | £2.7m | £2.4m | £1.3m | £2.4m |
| Profit before tax | £2.7m | £2.4m | £1.4m | £2.4m |
| Profit after tax | £2.5m | £2.5m | £1.3m | £2.1m |
| Profit (best available) | £2.5m | £2.5m | £1.3m | £2.1m |
| Staff costs | £3.9m | £4.1m | — | — |
| Employees (average) | 67 | 66 | 68 | 68 |
| Ratios | ||||
| Profit margin | 23.4% | 23.3% | 12.9% | 18.6% |
| Gross margin | 53.5% | 51.2% | 47.1% | 53.3% |
| Revenue per employee | £159k | £160k | £153k | £169k |
| Profit per employee | £37.3k | £37.3k | £19.8k | £31.4k |
| Growth (year on year) | ||||
| Revenue growth | — | ▼0.8% | ▼1.4% | ▲10.2% |
| Profit growth | — | ▼1.4% | ▼45.4% | ▲58.6% |
| Headcount growth | — | ▼1.5% | ▲3% | 0% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £5.5m | £3.8m | — | — |
| Net assets | £11.8m | £12.2m | — | — |
| Fixed assets | £1.7m | £4m | — | — |
| Current assets | £11.7m | £9.6m | — | — |
| Debtors | £3.1m | £2.3m | — | — |
| Deferred income | £883k | £855k | — | — |
| Source | Accounts · bulk data Dec 2023 | Accounts · bulk data Dec 2023 | Accounts · bulk data Jan 2025 | Accounts · bulk data Jan 2026 |
How the business works
- Profit margin
- 18.6%
- Profit ÷ revenue.
- Gross margin
- 53.3%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £169k
- Revenue ÷ average employees.
- Profit per employee
- £31.4k
- 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
- 0%
- Now 68
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Fidion Eot Limitedultimate parent75–100%
- Fidion Limited75–100%
- Cambustion Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (1)
- Cammotive LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
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Sources
Latest figures from accounts for the year to 30 Apr 2025 (profit £2.1m), from the Companies House accounts bulk data published Jan 2026. Spotted an error? Request a correction.
Updated from Companies House on 24 Oct 2026