Geb Surface Treatments Limited
Registered name: GEB SURFACE TREATMENTS LIMITED
Part of Sigma Advanced Systems Ltd groupGeb Surface Treatments Limited made £2.3m revenue and £436k profit in the year to 30 Apr 2025.
Geb Surface Treatments Limited’s revenue grew 6% to £2.3m in the year to 30 Apr 2025, with £436k profit and 22 employees. The company is classified under “treatment and coating of metals” and is based in Coventry; we hold 5 years of its filed accounts.
- Status
- Active
- Location
- Coventry, West Midlands
- Age
- 21 yrs · since 2005
- 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 | 30 Apr 2022 | 29 Apr 2023 | 30 Apr 2023 | 30 Apr 2024 | 30 Apr 2025 |
|---|---|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||||
| Revenue (turnover) | £1.3m | £1.9m | £1.9m | £2.1m | £2.3m |
| Cost of sales | £1.3m | £1.3m | £1.3m | £1.4m | £1.7m |
| Gross profit | £35k | £580k | £580k | £683k | £600k |
| Operating profit | −£495k | £313k | £313k | £607k | £373k |
| Profit before tax | −£499k | £306k | £306k | £605k | £436k |
| Profit after tax | −£414k | £306k | £306k | £605k | £436k |
| Profit (best available) | −£414k | £306k | £306k | £605k | £436k |
| Employees (average) | 15 | 16 | 16 | 21 | 22 |
| Ratios | |||||
| Profit margin | −31.5% | 16.4% | 16.4% | 28.4% | 19.4% |
| Gross margin | 2.7% | 31% | 31% | 32.1% | 26.7% |
| Revenue per employee | £87.7k | £117k | £117k | £101k | £102k |
| Profit per employee | −£27.6k | £19.1k | £19.1k | £28.8k | £19.8k |
| Growth (year on year) | |||||
| Revenue growth | — | — | — | ▲13.9% | ▲5.7% |
| Profit growth | — | — | — | ▲97.7% | ▼27.9% |
| Headcount growth | — | — | — | ▲31.3% | ▲4.8% |
| Balance sheet — indirect signals, not revenue | |||||
| Cash at bank | £95k | £52k | £52k | £6k | £10k |
| Net assets | £126k | £432k | £432k | £1m | £1.5m |
| Fixed assets | £457k | £458k | £458k | £366k | £280k |
| Current assets | £464k | £987k | £987k | £1.6m | £2.1m |
| Debtors | £346k | £467k | £467k | £498k | £552k |
| Deferred income | £42k | £42k | £42k | £58k | £74k |
| Source | Accounts · bulk data Aug 2024 | Accounts · bulk data Aug 2024 | FullAccounts · bulk data Apr 2025 | FullAccounts · bulk data Apr 2025 | FullAccounts · bulk data Jan 2026 |
How the business works
- Profit margin
- 19.4%
- Profit ÷ revenue.
- Gross margin
- 26.7%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £102k
- Revenue ÷ average employees.
- Profit per employee
- £19.8k
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 12.4%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 3.3%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 24.5%
- 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
- ▲42%
- Now £1.5m
- Cash at bank
- ▲67%
- Now £10k
- Headcount
- ▲5%
- Now 22
- Deferred income
- ▲28%
- Now £74k
- Fixed assets
- ▼24%
- Now £280k
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
Group structure
Ownership chain
- Sigma Advanced Systems Ltd (registered outside the UK register)ultimate parent75–100%
- Sigma Advanced Systems UK Ltd75–100%
- Nasmyth Group Limited75–100%
- Geb Surface Treatments Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (7)
- Nasmyth Bulwell LimitedRev. £28.9m · Profit −£1m
- Nasmyth Coventry LimitedRev. £10.8m · Profit −£1.1m
- Nasmyth Iec LimitedRev. £8.1m · Profit −£582k
- Nasmyth Henton LimitedRev. £6.7m · Profit −£388k
- Nasmyth Technologies LimitedRev. £4.5m · Profit £475k
- Nasmyth Enterprises LimitedRev. £848k · Profit −£1.2m
- Nasmyth Doughty LimitedLiquidationFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Similar profitable businesses
- Highland Metals LimitedMoray · Treatment and coating of metals
- Revenue
- £4.5m
- Profit
- £1.1m
- Staff
- 35
- Hyde Coatings LimitedStalybridge · Treatment and coating of metals
- Revenue
- £4.8m
- Profit
- £252k
- Staff
- 41
- Hardide PLCBicester · Treatment and coating of metals
- Revenue
- £6m
- Profit
- £178k
- Staff
- 30
- United Anodisers LimitedHuddersfield · Treatment and coating of metals
- Revenue
- £6.5m
- Profit
- £590k
- Staff
- 69
Sources
Latest figures from FullAccounts for the year to 30 Apr 2025 (profit £436k), from the Companies House accounts bulk data published Jan 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.