Subsea Innovation Limited
Registered name: SUBSEA INNOVATION LIMITED
Part of Unique System (UK) Limited groupSubsea Innovation Limited made £5m revenue and a £689k loss in the year to 31 Dec 2025.
Subsea Innovation Limited’s revenue was £5m in the year to 31 Dec 2025, with a loss of £689k and 32 employees. The company is classified under “manufacture of other special-purpose machinery” and is based in Darlington; we hold 3 years of its filed accounts.
- Status
- Active
- Location
- Darlington, North East
- Age
- 31 yrs · since 1995
- 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 Sep 2023 | 31 Dec 2024 | 31 Dec 2025 |
|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||
| Revenue (turnover) | £4.3m | £7.3m | £5m |
| Cost of sales | £3.3m | £5.7m | −£4.5m |
| Gross profit | £986k | £1.6m | £493k |
| Operating profit | −£1.4m | −£638k | −£1m |
| Profit before tax | −£1.4m | −£643k | −£1m |
| Profit after tax | −£1.4m | −£440k | −£689k |
| Profit (best available) | −£1.4m | −£440k | −£689k |
| Staff costs | £2.3m | £2.6m | — |
| Employees (average) | 40 | 38 | 32 |
| Ratios | |||
| Profit margin | −32.2% | −6% | −13.7% |
| Gross margin | 23.1% | 22.3% | 9.8% |
| Revenue per employee | £107k | £192k | £157k |
| Profit per employee | −£34.5k | −£11.6k | −£21.5k |
| Balance sheet — indirect signals, not revenue | |||
| Cash at bank | £191k | £145k | — |
| Net assets | £1.4m | £1.1m | — |
| Fixed assets | £3.5m | £338k | — |
| Current assets | £2.9m | £2.4m | — |
| Debtors | £1.8m | £1.2m | — |
| Deferred income | £667k | £298k | — |
| Source | FullAccounts · bulk data Jul 2025 | FullAccounts · bulk data Jul 2025 | Accounts · bulk data Jul 2026 |
How the business works
- Profit margin
- −13.7%
- Profit ÷ revenue.
- Gross margin
- 9.8%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £157k
- Revenue ÷ average employees.
- Profit per employee
- −£21.5k
- 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 32
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Unique System (UK) Limitedultimate parent75–100%
- Subsea Innovation Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (1)
- Gse Rentals LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Similar profitable businesses
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- Profit
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- Staff
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- Profit
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- Profit
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- Staff
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Sources
Latest figures from accounts for the year to 31 Dec 2025 (profit −£689k), from the Companies House accounts bulk data published Jul 2026. Spotted an error? Request a correction.
Updated from Companies House on 12 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.