Transonics Limited
Registered name: TRANSONICS LIMITED
Part of Castello Holding Company Limited groupTransonics Limited made £10.9m revenue and £317k profit in the year to 31 Aug 2024.
Transonics Limited’s revenue fell 34% to £10.9m in the year to 31 Aug 2024, with £317k profit and 44 employees. The company is classified under “manufacture of electronic components” and is based in Hemel Hempstead; we hold 3 years of its filed accounts.
- Status
- Active
- Location
- Hemel Hempstead, South East
- Age
- 50 yrs · since 1976
- 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 Aug 2022 | 31 Aug 2023 | 31 Aug 2024 |
|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||
| Revenue (turnover) | £21.1m | £16.3m | £10.9m |
| Cost of sales | £13.7m | £10.6m | £6.9m |
| Gross profit | £7.4m | £5.8m | £3.9m |
| Operating profit | £4.5m | £2.4m | £462k |
| Profit before tax | £4.5m | £2.3m | £458k |
| Profit after tax | £3.7m | £1.7m | £317k |
| Profit (best available) | £3.7m | £1.7m | £317k |
| Staff costs | £1.6m | £1.8m | £2m |
| Employees (average) | 31 | 36 | 44 |
| Ratios | |||
| Profit margin | 17.6% | 10.3% | 2.9% |
| Gross margin | 35.1% | 35.3% | 36.2% |
| Revenue per employee | £681k | £454k | £247k |
| Profit per employee | £120k | £46.9k | £7.2k |
| Cash conversion | −80.7% | −91% | 276% |
| Growth (year on year) | |||
| Revenue growth | — | ▼22.6% | ▼33.5% |
| Profit growth | — | ▼54.7% | ▼81.2% |
| Headcount growth | — | ▲16.1% | ▲22.2% |
| Balance sheet — indirect signals, not revenue | |||
| Cash at bank | £4m | £2.5m | £1.1m |
| Net assets | £5.6m | £5.3m | £5.6m |
| Fixed assets | £940k | £1.3m | £1.1m |
| Current assets | £10.9m | £7.1m | £7.1m |
| Debtors | £4.6m | £2.8m | £3.1m |
| Deferred income | £747k | £253k | £241k |
| Cash from operations | −£3.6m | −£2.2m | £1.3m |
| Source | FullAccounts · bulk data Feb 2024 | FullAccounts · bulk data Feb 2024 | FullAccounts · bulk data Feb 2025 |
How the business works
- Profit margin
- 2.9%
- Profit ÷ revenue.
- Gross margin
- 36.2%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £247k
- Revenue ÷ average employees.
- Profit per employee
- £7.2k
- Profit ÷ average employees.
- Cash conversion
- 276%
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 10.2%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 2.2%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 28.5%
- 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
- ▲6%
- Now £5.6m
- Cash at bank
- ▼57%
- Now £1.1m
- Headcount
- ▲22%
- Now 44
- Deferred income
- ▼5%
- Now £241k
- Fixed assets
- ▼11%
- Now £1.1m
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
Group structure
Ownership chain
- Castello Holding Company Limitedultimate parent75–100%
- Transonics Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (4)
- Alan Anderson Manufacturing LtdFigures not disclosed
- Applied Healthcare Products LimitedFigures not disclosed
- Lewmax Programming LimitedFigures not disclosed
- Pcba Manufacturing LimitedActive - Proposal to Strike offFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Similar profitable businesses
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- £11m
- Profit
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- Staff
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- Iqd Frequency Products LimitedCrewkerne · Manufacture of electronic components
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- DD-Scientific LimitedChelmsford · Manufacture of electronic components
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- Profit
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- The British Rototherm Company LimitedWest Glamorgan · Manufacture of electronic components
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- Ams Neve LimitedBurnley · Manufacture of electronic components
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Sources
Latest figures from FullAccounts for the year to 31 Aug 2024 (profit £317k), from the Companies House accounts bulk data published Feb 2025. 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.