Ambulatory Surgery International Ltd
Registered name: AMBULATORY SURGERY INTERNATIONAL LTD
Ambulatory Surgery International Ltd made £95.4m revenue and £25.2m profit in the year to 31 Dec 2025.
Ambulatory Surgery International Ltd’s revenue grew 12% to £95.4m in the year to 31 Dec 2025, with £25.2m profit and 436 employees. The company is classified under “general medical practice activities” and is based in London; we hold 3 years of its filed accounts.
- Status
- Active
- Location
- London, London
- Age
- 10 yrs · since 2015
- 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 2023 | 31 Dec 2024 | 31 Dec 2025 |
|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||
| Revenue (turnover) | £71.4m | £85.2m | £95.4m |
| Cost of sales | −£24.8m | −£31.5m | −£34.4m |
| Gross profit | £46.6m | £53.7m | £61.1m |
| Operating profit | £6.2m | £13.8m | £14.3m |
| Profit before tax | £3m | £11.7m | £14.2m |
| Profit after tax | −£482k | £7.2m | £25.2m |
| Profit (best available) | −£482k | £7.2m | £25.2m |
| Employees (average) | 332 | 385 | 436 |
| Ratios | |||
| Profit margin | −0.7% | 8.4% | 26.4% |
| Gross margin | 65.3% | 63% | 64% |
| Revenue per employee | £215k | £221k | £219k |
| Profit per employee | −£1.5k | £18.6k | £57.7k |
| Growth (year on year) | |||
| Revenue growth | — | ▲19.3% | ▲12.1% |
| Profit growth | — | — | ▲251.1% |
| Headcount growth | — | ▲16% | ▲13.3% |
| Balance sheet — indirect signals, not revenue | |||
| Net assets | — | — | — |
| Source | Accounts · bulk data Oct 2025 | Accounts · bulk data Oct 2025 | Accounts · bulk data Aug 2026 |
How the business works
- Profit margin
- 26.4%
- Profit ÷ revenue.
- Gross margin
- 64%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £219k
- Revenue ÷ average employees.
- Profit per employee
- £57.7k
- 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
- ▲13%
- Now 436
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Subsidiaries (10)
- Asi Cambridge Holdings LimitedFigures not disclosed
- Asi Edinburgh Holdings LimitedFigures not disclosed
- Asi Hampshire Holdings LimitedFigures not disclosed
- Asi London P LimitedFigures not disclosed
- Asi London S LimitedFigures not disclosed
- Asi Oxford Holdings LimitedFigures not disclosed
- Asi Welbeck Holdings LimitedFigures not disclosed
- Welbeck Developments LimitedFigures not disclosed
- Welbeck East Midlands Holdings LimitedFigures not disclosed
- Welbeck Health Partners Management UK LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Similar profitable businesses
- Community Health and Eyecare LimitedPreston · General medical practice activities
- Revenue
- £94.3m
- Profit
- £15.2m
- Staff
- 655
- Psych-UK LimitedCamelford · General medical practice activities
- Revenue
- £160m
- Profit
- £5.9m
- Staff
- 247
- Care Unbound LimitedBrighton · General medical practice activities
- Revenue
- £52.1m
- Profit
- £3m
- Staff
- 206
- Health Bridge LimitedBristol · General medical practice activities
- Revenue
- £40.2m
- Profit
- £3.6m
- Staff
- 142
Sources
Latest figures from accounts for the year to 31 Dec 2025 (profit £25.2m), from the Companies House accounts bulk data published Aug 2026. Spotted an error? Request a correction.
Updated from Companies House on 13 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.