Sentinel 123 Limited
Registered name: SENTINEL 123 LIMITED
Part of Westbridge III GP LLP groupSentinel 123 Limited made £18.5m revenue and a £5.2m loss in the year to 31 Oct 2025.
Sentinel 123 Limited’s revenue grew 60% to £18.5m in the year to 31 Oct 2025, with a loss of £5.2m and 221 employees. The company is classified under “activities of other holding companies” and is based in Solihull; we hold 2 years of its filed accounts.
- Status
- Active
- Location
- Solihull, West Midlands
- Age
- 2 yrs · since 2023
- Type
- Private Limited Company
Pass-through vehicle. This looks like a holding, staffing or umbrella company. Its revenue and profit may largely pass through to or from other entities, so the figures may not reflect a standalone operating business. It is excluded from our opportunity lists.
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 Oct 2024 | 31 Oct 2025 |
|---|---|---|
| Disclosure | Full P&L | Full P&L |
| Profit & loss | ||
| Revenue (turnover) | £11.5m | £18.5m |
| Cost of sales | −£7.5m | −£12.2m |
| Gross profit | £4m | £6.3m |
| Operating profit | −£1.7m | −£1.7m |
| Profit before tax | −£4.1m | −£4.9m |
| Profit after tax | −£4.1m | −£5.2m |
| Profit (best available) | −£4.1m | −£5.2m |
| Employees (average) | 183 | 221 |
| Ratios | ||
| Profit margin | −35.3% | −28.3% |
| Gross margin | 34.8% | 34.1% |
| Revenue per employee | £62.9k | £83.6k |
| Profit per employee | −£22.2k | −£23.6k |
| Growth (year on year) | ||
| Revenue growth | — | ▲60.4% |
| Headcount growth | — | ▲20.8% |
| Balance sheet — indirect signals, not revenue | ||
| Net assets | — | — |
| Source | Accounts · bulk data Jul 2025 | Accounts · bulk data Jul 2026 |
How the business works
- Profit margin
- −28.3%
- Profit ÷ revenue.
- Gross margin
- 34.1%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £83.6k
- Revenue ÷ average employees.
- Profit per employee
- −£23.6k
- 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
- ▲21%
- Now 221
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Westbridge III GP LLPultimate parent75–100%
- Sentinel 123 Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Subsidiaries (1)
- Sentinel 456 LimitedRev. £18.5m · Profit −£5.2m
Sister companies (2)
- Causeway Securities LimitedRev. £26.1m · Profit £4.1m
- Satori 123 LimitedRev. — · Profit −£1k
From the Persons with Significant Control register (corporate controllers only).
Sources
Latest figures from accounts for the year to 31 Oct 2025 (profit −£5.2m), from the Companies House accounts bulk data published Jul 2026. Spotted an error? Request a correction.
Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.