STS Marine Solutions (UK) Limited
Registered name: STS MARINE SOLUTIONS (UK) LIMITED
STS Marine Solutions (UK) Limited made £10.4m revenue and £446k profit in the year to 31 Dec 2025.
STS Marine Solutions (UK) Limited’s revenue grew 110% to £10.4m in the year to 31 Dec 2025, with £446k profit and 35 employees. The company is classified under “service activities incidental to water transportation” and is based in Sunderland; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Sunderland, North East
- Age
- 42 yrs · since 1984
- 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 Dec 2022 | 31 Dec 2023 | 31 Dec 2024 | 31 Dec 2025 |
|---|---|---|---|---|
| Disclosure | Full P&Lread from filing text | Full P&Lread from filing text | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | £3.4m | £4.4m | £5m | £10.4m |
| Cost of sales | £945k | £990k | −£1.2m | −£5.3m |
| Gross profit | £2.5m | £3.4m | £3.8m | £5.1m |
| Operating profit | −£256k | £535k | £733k | £927k |
| Profit before tax | −£256k | £253k | £274k | £496k |
| Profit after tax | −£290k | £189k | £107k | £446k |
| Profit (best available) | −£290k | £189k | £107k | £446k |
| Staff costs | £2.2m | £2.6m | — | — |
| Employees (average) | 28 | 28 | 222 | 35 |
| Ratios | ||||
| Profit margin | −8.5% | 4.3% | 2.2% | 4.3% |
| Gross margin | 72.4% | 77.3% | 75.9% | 49% |
| Revenue per employee | £122k | £156k | £22.3k | £297k |
| Profit per employee | −£10.4k | £6.8k | £483 | £12.7k |
| Growth (year on year) | ||||
| Revenue growth | — | ▲27.6% | ▲13.7% | ▲109.9% |
| Profit growth | — | — | ▼43.4% | ▲316.5% |
| Headcount growth | — | 0% | ▲692.9% | ▼84.2% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £23.9k | £82.9k | — | — |
| Net assets | £2.8m | £3m | — | — |
| Source | FullAccounts · bulk data Sep 2024 | FullAccounts · bulk data Sep 2024 | Accounts · bulk data Oct 2025 | Accounts · bulk data Jun 2026 |
How the business works
- Profit margin
- 4.3%
- Profit ÷ revenue.
- Gross margin
- 49%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £297k
- Revenue ÷ average employees.
- Profit per employee
- £12.7k
- 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
- ▼84%
- Now 35
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Similar profitable businesses
Sources
Latest figures from accounts for the year to 31 Dec 2025 (profit £446k), from the Companies House accounts bulk data published Jun 2026. Spotted an error? Request a correction.
Updated from Companies House on 15 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.