Longmartin Investments Limited
Registered name: LONGMARTIN INVESTMENTS LIMITED
Part of The Mercers' Company groupLongmartin Investments Limited made £1.3m revenue and £128 profit in the year to 31 Dec 2025.
Longmartin Investments Limited’s revenue was £1.3m in the year to 31 Dec 2025, with £128 profit. The company is classified under “buying and selling of own real estate” and is based in London; we hold 3 years of its filed accounts.
- Status
- Active
- Location
- London
- Age
- 21 yrs · since 2005
- Type
- Private Limited Company
Key figures
Financial history
| Year to | 31 Dec 2023 | 31 Dec 2024 | 31 Dec 2025 |
|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||
| Revenue (turnover) | £1.6m | £1.3m | £1.3m |
| Cost of sales | −£1.6m | −£1.3m | −£1.2m |
| Gross profit | £0 | £2.8k | £54.7k |
| Operating profit | −£255 | −£11.5k | £47.7k |
| Profit before tax | −£216 | −£11.5k | £50.1k |
| Profit after tax | −£216 | −£11.5k | £128 |
| Profit (best available) | −£216 | −£11.5k | £128 |
| Employees (average) | — | — | — |
| Ratios | |||
| Profit margin | 0% | −0.9% | 0% |
| Gross margin | 0% | 0.2% | 4.3% |
| Growth (year on year) | |||
| Revenue growth | — | — | ▼0.1% |
| Balance sheet — indirect signals, not revenue | |||
| Net assets | — | — | — |
| Source | Accounts · bulk data Jul 2025 | Accounts · bulk data Jul 2025 | Accounts · bulk data Sep 2026 |
How the business works
- Profit margin
- 0%
- Profit ÷ revenue.
- Gross margin
- 4.3%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- —
- Revenue ÷ average employees.
- Profit per employee
- —
- 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 —
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- The Mercers' Company (registered outside the UK register)ultimate parent75–100%
- Longmartin Properties Limited75–100%
- Longmartin Investments Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (1)
- ST Martin's Courtyard LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Sources
Latest figures from accounts for the year to 31 Dec 2025 (profit £128), from the Companies House accounts bulk data published Sep 2026. Spotted an error? Request a correction.
Updated from Companies House on 23 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.