Thames Water Utilities Limited
Registered name: THAMES WATER UTILITIES LIMITED
Part of Kemble Water Holdings Limited groupThames Water Utilities Limited made £2.7bn revenue and a £1.8bn loss in the year to 31 Mar 2025.
Thames Water Utilities Limited’s revenue grew 29% to £2.7bn in the year to 31 Mar 2025, with a loss of £1.8bn and 7,824 employees. The company is classified under “water collection, treatment and supply” and is based in Reading; we hold 2 years of its filed accounts.
- Status
- Active
- Location
- Reading, South East
- Age
- 37 yrs · since 1989
- 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 2024 | 31 Mar 2025 |
|---|---|---|
| Disclosure | Full P&L | Full P&L |
| Profit & loss | ||
| Revenue (turnover) | £2.1bn | £2.7bn |
| Operating profit | £517m | £471m |
| Profit before tax | −£10.8m | −£1.9bn |
| Profit after tax | −£50.4m | −£1.8bn |
| Profit (best available) | −£50.4m | −£1.8bn |
| Employees (average) | 7,934 | 7,824 |
| Ratios | ||
| Profit margin | −2.4% | −64.6% |
| Revenue per employee | £267k | £350k |
| Profit per employee | −£6.4k | −£226k |
| Growth (year on year) | ||
| Revenue growth | — | ▲29.3% |
| Headcount growth | — | ▼1.4% |
| Balance sheet — indirect signals, not revenue | ||
| Net assets | — | — |
| Source | Accounts · bulk data Dec 2025 | Accounts · bulk data Dec 2025 |
How the business works
- Profit margin
- −64.6%
- Profit ÷ revenue.
- Gross margin
- —
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £350k
- Revenue ÷ average employees.
- Profit per employee
- −£226k
- 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
- ▼1%
- Now 7,824
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Kemble Water Holdings Limitedultimate parent75–100%
- Kemble Water Eurobond PLC75–100%
- Kemble Water Finance Limited75–100%
- Thames Water Limited75–100%
- Thames Water Utilities Holdings Limited75–100%
- Thames Water Utilities Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Subsidiaries (2)
- Thames Water Super Senior Issuer PLCFigures not disclosed
- Thames Water Utilities Finance PLCFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Similar profitable businesses
Sources
Latest figures from accounts for the year to 31 Mar 2025 (profit −£1.8bn), from the Companies House accounts bulk data published Dec 2025. 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.