How much does Immunodiagnostic Systems Limited make?

Immunodiagnostic Systems Limited reported revenue of £31.6m and a loss of £18.7k in the year to 29 Dec 2024, according to its accounts filed at Companies House.

How many employees does Immunodiagnostic Systems Limited have?

Immunodiagnostic Systems Limited reported an average of 58 employees in the year to 29 Dec 2024.

Is Immunodiagnostic Systems Limited profitable?

No — Immunodiagnostic Systems Limited reported a loss of £18.7k in the year to 29 Dec 2024.

Company No. 03141527 · Incorporated 27 Dec 1995

Immunodiagnostic Systems Limited

Registered name: IMMUNODIAGNOSTIC SYSTEMS LIMITED

Part of Wellesley Bv group

Immunodiagnostic Systems Limited made £31.6m revenue and a £18.7k loss in the year to 29 Dec 2024. read from filing text

Immunodiagnostic Systems Limited’s revenue grew 16% to £31.6m in the year to 29 Dec 2024, with a loss of £18.7k and 58 employees. The company is classified under “other manufacturing” and is based in Boldon; we hold 3 years of its filed accounts.

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

Status: Active
Location: Boldon, North East
Age: 30 yrs · since 1995
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 immediate parent company is Immunodiagnostic Systems Holdings Limited. The registered office of the immediate parent company is 10 Didcot Way, Boldon Business Park, Boldon Colliery, Tyne and Wear,”

Latest accounts · year to 29 Dec 2024

Key figures

Revenue

£31.6m

Growth ▲16.2%

Profit

−£18.7k

Growth ▼100.5%

Profit margin

−0.1%

Gross 24.3%

Employees

Change ▲3.6%

Profit / employee

−£322

Revenue/employee £545k

Profitable streak

0yrs

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	31 Dec 2022	31 Dec 2023	29 Dec 2024
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£26.7m	£27.2m	£31.6m
Cost of sales	£20.3m	£18.3m	£23.9m
Gross profit	£6.3m	£9m	£7.7m
Operating profit	−£1.5m	£2.2m	£507k
Profit before tax	£8.8m	£1.7m	£86.5k
Profit after tax	£8.7m	£3.5m	−£18.7k
Profit (best available)	£8.7m	£3.5m	−£18.7k
Staff costs	£2.5m	£2.4m	£2.5m
Employees (average)	55	56	58
Ratios
Profit margin	32.7%	12.9%	−0.1%
Gross margin	23.7%	32.9%	24.3%
Revenue per employee	£485k	£486k	£545k
Profit per employee	£159k	£62.7k	−£322
Growth (year on year)
Revenue growth	—	▲2.1%	▲16.2%
Profit growth	—	▼59.8%	▼100.5%
Headcount growth	—	▲1.8%	▲3.6%
Balance sheet — indirect signals, not revenue
Cash at bank	£833k	£1.6m	£1.1m
Net assets	£1m	£4.5m	£4.5m
Fixed assets	£4.8m	£4.6m	£4.5m
Current assets	£14m	£16.9m	£11m
Debtors	£2.7m	£2.6m	£2.5m
Deferred income	£0	£33.6k	£32.5k
Source	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data Dec 2025

Derived from the latest filing

How the business works

Profit margin: −0.1%; Profit ÷ revenue.
Gross margin: 24.3%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £545k; Revenue ÷ average employees.
Profit per employee: −£322; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 14.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 0.1%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 7.9%; 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: ▼0%; Now £4.5m
Cash at bank: ▼28%; Now £1.1m
Headcount: ▲4%; Now 58
Deferred income: ▼3%; Now £32.5k
Fixed assets: ▼2%; Now £4.5m

Corporate ownership

Group structure

Ownership chain

Wellesley Bv (registered outside the UK register)ultimate parent75–100%
Revvity (UK) Holdings Limited75–100%
Immunodiagnostic Systems Holdings Limited75–100%
Immunodiagnostic Systems Limitedthis 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).

Same industry, similar size

Similar profitable businesses

Industry benchmarks →

Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 29 Dec 2024 (profit −£18.7k), from the Companies House accounts bulk data published Dec 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.