How much does Alpha Laboratories Limited make?

Alpha Laboratories Limited reported revenue of £16.8m and £925k profit in the year to 30 Sep 2025, according to its accounts filed at Companies House.

How many employees does Alpha Laboratories Limited have?

Alpha Laboratories Limited reported an average of 75 employees in the year to 30 Sep 2025.

Is Alpha Laboratories Limited profitable?

Yes — Alpha Laboratories Limited reported a profit of £925k in the year to 30 Sep 2025.

Company No. 01215816 · Incorporated 12 Jun 1975

Alpha Laboratories Limited

Registered name: ALPHA LABORATORIES LIMITED

Part of Diploma PLC group

Alpha Laboratories Limited made £16.8m revenue and £925k profit in the year to 30 Sep 2025. read from filing text

Alpha Laboratories Limited’s revenue was £16.8m in the year to 30 Sep 2025, with £925k profit and 75 employees. The company is classified under “agents specialized in the sale of other particular products” and is based in London; we hold 3 years of its filed accounts.

Full P&L filedSection G · Wholesale and retail trade; repair of motor vehiclesSIC 46180Agents specialized in the sale of other particular products

Status: Active
Location: London, London
Age: 51 yrs · since 1975
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: “The ultimate parent company is Diploma Holdings Plc. The smallest and largest group of undertakings of which the company is a member and that draws up group financial statements is that of Diploma Hol”

Latest accounts · year to 30 Sep 2025

Key figures

Cash flow filed

Revenue

£16.8m

Growth —

Profit

£925k

Growth —

Profit margin

5.5%

Gross 46.8%

Employees

Change —

Profit / employee

£12.3k

Revenue/employee £224k

Profitable streak

3yrs

Consecutive profitable years in our data

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

3 filed years

Financial history

Multi-year financials, oldest to newest
Year to	30 Sep 2023	31 Dec 2024	30 Sep 2025
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£19.4m	£26.6m	£16.8m
Cost of sales	£12.6m	£14.9m	£8.9m
Gross profit	£6.7m	£11.7m	£7.9m
Operating profit	£438k	£3.6m	£1.3m
Profit before tax	£705k	£4.4m	£1.7m
Profit after tax	£522k	£3.3m	£925k
Profit (best available)	£522k	£3.3m	£925k
Staff costs	£3.7m	£4.8m	£3.5m
Employees (average)	71	71	75
Ratios
Profit margin	2.7%	12.4%	5.5%
Gross margin	34.7%	44.1%	46.8%
Revenue per employee	£273k	£375k	£224k
Profit per employee	£7.4k	£46.3k	£12.3k
Cash conversion	661.4%	138.7%	1321%
Balance sheet — indirect signals, not revenue
Cash at bank	£19.8m	£24.1m	£5m
Net assets	£26.2m	£28.9m	£29.8m
Fixed assets	£2.8m	£3.6m	£3.9m
Current assets	£26.8m	£30.1m	£30m
Debtors	£2.7m	£2.1m	£2.4m
Deferred income	£508k	£401k	£617k
Cash from operations	£2.9m	£5m	£17.7m
Source	FullAccounts · bulk data Aug 2025	FullAccounts · bulk data Aug 2025	FullAccounts · bulk data Jun 2026

Derived from the latest filing

How the business works

Profit margin: 5.5%; Profit ÷ revenue.
Gross margin: 46.8%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £224k; Revenue ÷ average employees.
Profit per employee: £12.3k; Profit ÷ average employees.
Cash conversion: 1321%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 23.1%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 3.7%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 14.2%; 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: —; Now £29.8m
Cash at bank: —; Now £5m
Headcount: —; Now 75
Deferred income: —; Now £617k
Fixed assets: —; Now £3.9m

Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.

Corporate ownership

Group structure

Ownership chain

Diploma PLCultimate parent75–100%
Diploma Holdings PLC75–100%
Diploma UK Holdings Limited75–100%
Alpha Laboratories Limitedthis company

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

Sister companies (9)

The Lodge Group LimitedRev. £17.7m · Profit £4.1m
Swift Aerospace Services LimitedRev. £17.7m · Profit £1.9m
Cabletec Interconnect Components Systems LimitedFigures not disclosed
Clarendon Specialty Fasteners LimitedFigures not disclosed
I.s. Group (Europe) LimitedFigures not disclosed
Is-Rayfast LimitedFigures not disclosed
Krempfast LimitedFigures not disclosed
Spring Industrial LimitedFigures not disclosed
WDS Components LimitedFigures not disclosed

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

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 30 Sep 2025 (profit £925k), 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.