How much does Thermex Limited make?

Thermex Limited reported revenue of £11.5m and £1.3m profit in the year to 30 Sep 2025, according to its accounts filed at Companies House.

How many employees does Thermex Limited have?

Thermex Limited reported an average of 53 employees in the year to 30 Sep 2025.

Is Thermex Limited profitable?

Yes — Thermex Limited reported a profit of £1.3m in the year to 30 Sep 2025.

Company No. 01420384 · Incorporated 16 May 1979

Thermex Limited

Registered name: THERMEX LIMITED

Part of Diamond Rain Limited group

Thermex Limited made £11.5m revenue and £1.3m profit in the year to 30 Sep 2025. read from filing text

Thermex Limited’s revenue fell 8% to £11.5m in the year to 30 Sep 2025, with £1.3m profit and 53 employees. The company is classified under “machining” and is based in Redditch; we hold 4 years of its filed accounts.

Full P&L filedSection C · ManufacturingSIC 25620Machining SIC 32990Other manufacturing n.e.c.

Status: Active
Location: Redditch, West Midlands
Age: 47 yrs · since 1979
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. From the filing: “Diamond Rain Limited is the immediate and ultimate parent undertaking. The ultimate controlling party of Diamond Rain Limited is Mr J”

Latest accounts · year to 30 Sep 2025

Key figures

Cash flow filed

Revenue

£11.5m

Growth ▼8.5%

Profit

£1.3m

Growth ▲9.7%

Profit margin

11.4%

Gross 35.7%

Employees

Change ▼8.6%

Profit / employee

£24.7k

Revenue/employee £216k

Profitable streak

4yrs

Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

4 filed years

Financial history

Multi-year financials, oldest to newest
Year to	30 Sep 2022	30 Sep 2023	30 Sep 2024	30 Sep 2025
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£10.1m	£11.8m	£12.5m	£11.5m
Cost of sales	£7.6m	£8.5m	£8.9m	£7.4m
Gross profit	£2.5m	£3.3m	£3.7m	£4.1m
Operating profit	£765k	£866k	£1.3m	£1.7m
Profit before tax	£747k	£823k	£1.2m	£1.6m
Profit after tax	£616k	£633k	£1.2m	£1.3m
Profit (best available)	£616k	£633k	£1.2m	£1.3m
Staff costs	£2m	£2.7m	£2.6m	£2.5m
Employees (average)	58	61	58	53
Ratios
Profit margin	6.1%	5.4%	9.5%	11.4%
Gross margin	24.8%	27.7%	29.3%	35.7%
Revenue per employee	£174k	£193k	£216k	£216k
Profit per employee	£10.6k	£10.4k	£20.6k	£24.7k
Cash conversion	−191.7%	−125.2%	−133.7%	−70.2%
Growth (year on year)
Revenue growth	—	▲17.1%	▲6.4%	▼8.5%
Profit growth	—	▲2.8%	▲88.7%	▲9.7%
Headcount growth	—	▲5.2%	▼4.9%	▼8.6%
Balance sheet — indirect signals, not revenue
Cash at bank	£227k	£146k	£505k	£169k
Net assets	£2.5m	£3.2m	£4.6m	£5.9m
Fixed assets	£2.7m	£2.9m	£2.9m	£3.3m
Current assets	£6m	£6.8m	£6.9m	£7.4m
Debtors	£2.4m	£2.2m	£2m	£2.2m
Deferred income	£190k	£183k	£632k	£129k
Cash from operations	−£1.5m	−£1.1m	−£1.8m	−£1.2m
Source	FullAccounts · bulk data Jun 2024	FullAccounts · bulk data Jun 2024	FullAccounts · bulk data Jun 2025	FullAccounts · bulk data Jun 2026

Derived from the latest filing

How the business works

Profit margin: 11.4%; Profit ÷ revenue.
Gross margin: 35.7%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £216k; Revenue ÷ average employees.
Profit per employee: £24.7k; Profit ÷ average employees.
Cash conversion: −70.2%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 28.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 1.1%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 19.2%; Money owed by customers. Low = customers pay quickly.

Indirect — not revenue

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: ▲29%; Now £5.9m
Cash at bank: ▼67%; Now £169k
Headcount: ▼9%; Now 53
Deferred income: ▼80%; Now £129k
Fixed assets: ▲12%; Now £3.3m

Corporate ownership

Group structure

Ownership chain

Diamond Rain Limitedultimate parent75–100%
Thermex Limitedthis company

Bands show the share of ownership each company holds in the one below it.

Sister companies (1)

Harcross Developments LimitedFigures not disclosed

From the Persons with Significant Control register (corporate controllers only).

Same industry, similar size

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 30 Sep 2025 (profit £1.3m), from the Companies House accounts bulk data published Jun 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.