Mainprize Offshore Ltd
Registered name: MAINPRIZE OFFSHORE LTD
Part of Project Summer Topco Limited groupMainprize Offshore Ltd made £18.7m revenue and £3.2m profit in the year to 31 Mar 2025.
Mainprize Offshore Ltd’s revenue grew 25% to £18.7m in the year to 31 Mar 2025, with £3.2m profit and 17 employees. The company is classified under “sea and coastal passenger water transport” and is based in Scarborough; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Scarborough, Yorkshire and The Humber
- Age
- 47 yrs · since 1979
- 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 Mar 2022 | 31 Mar 2023 | 31 Mar 2024 | 31 Mar 2025 |
|---|---|---|---|---|
| Disclosure | Full P&Lread from filing text | Full P&L | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | £8.6m | £10.5m | £15m | £18.7m |
| Cost of sales | £6.1m | £7.5m | £10.6m | £13.1m |
| Gross profit | £2.5m | £4.1m | £4.5m | £5.6m |
| Operating profit | £1.5m | £3m | £3.3m | £4.9m |
| Profit before tax | £1.4m | £1.7m | £2.8m | £4m |
| Profit after tax | — | £2.4m | £2.8m | £3.2m |
| Profit (best available) | £1.4m | £2.4m | £2.8m | £3.2m |
| Staff costs | £548k | £619k | £358k | £98k |
| Employees (average) | 11 | 13 | 16 | 17 |
| Ratios | ||||
| Profit margin | 16% | 22.7% | 18.4% | 17.3% |
| Gross margin | 29% | 39% | 29.6% | 29.8% |
| Revenue per employee | £780k | £805k | £939k | £1.1m |
| Profit per employee | £125k | £183k | £173k | £190k |
| Growth (year on year) | ||||
| Revenue growth | — | ▲21.9% | ▲43.6% | ▲24.6% |
| Profit growth | — | ▲73% | ▲16.4% | ▲16.9% |
| Headcount growth | — | ▲18.2% | ▲23.1% | ▲6.3% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £2.9m | £549k | £1.4m | £1.6m |
| Net assets | £12.3m | £14.3m | £20m | £19.5m |
| Fixed assets | — | £32.7m | £33.5m | £37.6m |
| Current assets | — | £3m | £9.2m | £7.3m |
| Debtors | — | £2.1m | £2.5m | £3.1m |
| Deferred income | — | £93.5k | £71.5k | £78.7k |
| Source | FullAccounts · bulk data Oct 2023 | FullAccounts · bulk data Oct 2023 | FullAccounts · bulk data Sep 2024 | FullAccounts · bulk data Oct 2025 |
How the business works
- Profit margin
- 17.3%
- Profit ÷ revenue.
- Gross margin
- 29.8%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £1.1m
- Revenue ÷ average employees.
- Profit per employee
- £190k
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 201%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 0.4%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 16.4%
- 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
- ▼3%
- Now £19.5m
- Cash at bank
- ▲15%
- Now £1.6m
- Headcount
- ▲6%
- Now 17
- Deferred income
- ▲10%
- Now £78.7k
- Fixed assets
- ▲12%
- Now £37.6m
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
- Project Summer Topco Limitedultimate parent75–100%
- Project Summer Bidco Limited75–100%
- Mainprize Holdings Limited75–100%
- Mainprize Midco Limited75–100%
- Mainprize Offshore Ltdthis 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).
Similar profitable businesses
- B.a.i. (U.K.), LimitedSea and coastal passenger water transport
- Revenue
- £22m
- Profit
- £972k
- Staff
- 369
- Seacat Services LtdCowes · Sea and coastal passenger water transport
- Revenue
- £12.3m
- Profit
- £272k
- Staff
- 124
- Holyhead Boatyard LimitedHolyhead · Sea and coastal passenger water transport
- Revenue
- £7.7m
- Profit
- £584k
- Staff
- 63
Sources
Latest figures from FullAccounts for the year to 31 Mar 2025 (profit £3.2m), from the Companies House accounts bulk data published Oct 2025. 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.