Kaluza Ltd
Registered name: KALUZA LTD
Part of Energy Transition Holdings Ltd groupKaluza Ltd made £35m revenue and a £47m loss in the year to 31 Dec 2024.
Kaluza Ltd’s revenue grew 13% to £35m in the year to 31 Dec 2024, with a loss of £47m and 486 employees. The company is classified under “other information technology service activities” and is based in London; we hold 2 years of its filed accounts.
- Status
- Active
- Location
- London
- Age
- 7 yrs · since 2019
- Type
- Private Limited Company
Key figures
Financial history
| Year to | 31 Dec 2023 | 31 Dec 2024 |
|---|---|---|
| Disclosure | Full P&L | Full P&L |
| Profit & loss | ||
| Revenue (turnover) | £31m | £35m |
| Cost of sales | −£20.8m | −£23m |
| Gross profit | £10.2m | £12m |
| Operating profit | −£31.8m | −£54m |
| Profit before tax | −£33.3m | −£55m |
| Profit after tax | −£26.1m | −£47m |
| Profit (best available) | −£26.1m | −£47m |
| Employees (average) | 458 | 486 |
| Ratios | ||
| Profit margin | −84.2% | −134.3% |
| Gross margin | 32.9% | 34.3% |
| Revenue per employee | £67.7k | £72k |
| Profit per employee | −£57k | −£96.7k |
| Growth (year on year) | ||
| Revenue growth | — | ▲12.9% |
| Headcount growth | — | ▲6.1% |
| Balance sheet — indirect signals, not revenue | ||
| Net assets | — | — |
| Source | Accounts · bulk data Sep 2024 | Accounts · bulk data Oct 2025 |
How the business works
- Profit margin
- −134.3%
- Profit ÷ revenue.
- Gross margin
- 34.3%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £72k
- Revenue ÷ average employees.
- Profit per employee
- −£96.7k
- 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
- ▲6%
- Now 486
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Energy Transition Holdings Ltdultimate parent75–100%
- Energy Transition Group Ltd75–100%
- Energy Transition Finance Ltd75–100%
- Kaluza Holdings 1 Ltd75–100%
- Kaluza Holdings 2 Ltd50–75%
- Kaluza 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).
Sources
Latest figures from accounts for the year to 31 Dec 2024 (profit −£47m), from the Companies House accounts bulk data published Oct 2025. Spotted an error? Request a correction.
Updated from Companies House on 24 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.