£19.46m
−3%vs Mar 2024Active01408138Private limited companyScarborough
MAINPRIZE OFFSHORE LTD
Significant control: Mainprize Midco Limited (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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What does Mainprize Offshore Ltd sell?
Registered activity: Sea and coastal passenger water transport (SIC 50100). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
MAINPRIZE OFFSHORE LTD is an active private limited company (company number 01408138) incorporated on 9 January 1979, registered in Scarborough. Its registered activity is sea and coastal passenger water transport (SIC 50100). Latest medium accounts cover the period ending 31 March 2025, showing net assets of £19.46m and cash of £1.63m, with 17 employees on average. Turnover was £18.73m and profit for the year £3.23m. Net assets fell 3% on the prior period (£19.96m).
Peer position · net assets
By net assets it sits in the top quarter of 198 comparable companies in Other (median £22, upper quartile £27k).
02
Ownership and control
- Mainprize Midco Limited
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
- Mrs Sharon Marie Mainprize
- owns 50–75% of shares
- holds 50–75% of voting rights
- can appoint or remove directors
- Robert Rewcroft Mainprize Jnr
- owns 50–75% of shares
- holds 50–75% of voting rights
- Mainprize Holdings Limited
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 9 January 197947 yrs ago
- Next accounts due
- 31 December 2026in 64 days
- Confirmation statement due
- 23 January 2027in 87 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 50100
- Sea and coastal passenger water transport
- Accounts type
- Medium
- Size band
- MediumCompanies Act thresholds
05
Financials
£1.63m
+15%vs Mar 2024£18.73m
+25%vs Mar 202417
+6%vs Mar 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 March 2025 | £19.46m | £1.63m | £5.66m | — | £18.73m | £3.23m | 17 |
| 31 March 2024 | £19.96m | £1.42m | £7.57m | — | £15.03m | £2.77m | 16 |
| 31 March 2023 | — | — | — | — | — | — | — |
Net margin17.3%Profit for the year ÷ turnover
Cash per employee£96kCash ÷ average employees
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
06
Filing and accounts signals
- Net assets above zeroNet assets £19,456,604 at 31 March 2025
- Cash at bank of £50,000 or moreCash £1,628,203
- Three or more accounting periods on record3 periods on record
- Incorporated five or more years agoIncorporated 9 January 1979
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Confirmation statement duein 87 days
- Next accounts duein 64 days
- Accounts period endNet assets £19.46m · medium accounts
- Accounts period endNet assets £19.96m · medium accounts
- Accounts period end
- Incorporated
08
Similar companies in the UK
- ARISAIG MARINE LIMITEDArisaig · inc. Nov 1975
- EVANS (THE DOCKS) LIMITEDTruro · inc. Aug 1984
- B.A.I. (U.K.), LIMITEDinc. Nov 1972
- WINTERS MARINE LIMITEDDorset · inc. Nov 1971
- HARWICH INTERNATIONAL PORT LIMITEDFelixstowe · inc. Mar 1990
- M M MARINE LTDLyme Regis · inc. Mar 1992
All companies incorporated on 9 January 1979 · in Jan 1979.
09
Reminders for MAINPRIZE OFFSHORE LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.