ROCKWOOL LIMITED

Active
Company number 00972252Private limited companyIncorporated 1970

Key figures

£162,437,000+6.8%
Net assets 2025
+6.8%
Average annual growth 2024–2025
050 m100 m150 m200 m20242025

† ROCKWOOL LIMITED filed these accounts on paper, so Companies House publishes them only as a scanned image. The figures for the years marked † were read automatically from the scan and kept only where the statements add up (for example net assets equal total equity), but a reading error is still possible — check the original accounts at Companies House.

Ratios

2025

Sector comparison

SIC 23990

Where the company stands among the 284 active companies whose first SIC code is 23990 (Manufacture of other non-metallic mineral products n.e.c.).

Net assets£162,437,000
Higher than 99% · median £56,662
Total assets£215,270,000
Higher than 99% · median £277,292
Cash£11,148,000
Higher than 98% · median £82,003
Employees565
Higher than 97% · median 2
Company age56.7 years
Older than 96% · median 12.5 years
Largest in this sector by net assets
  1. ROCKWOOL LIMITED£162.4m
  2. VIBRANTZ MINERALS LIMITED£91.8m
  3. DAY GROUP LIMITED£53.2m
  4. JAMES DURRANS & SONS,LIMITED£28.2m
  5. KERAKOLL U.K. LIMITED£26.5m
  6. CARBON INTERNATIONAL LIMITED£23.6m
  7. JAMES A. JOBLING AND COMPANY LIMITED£15.1m
  8. BLUE PHOENIX LIMITED£11.8m
  9. TOLSA UK LIMITED£10.3m
  10. GREENBOTTLE RE-REFINING (UK) LIMITED£9.1m

Positions are approximate. Figures come from each company's latest accounts; money and employee figures are compared only with companies that filed accounts in pounds for a period ending in the last two and a half years and are not dormant, so those groups are smaller than 284. The line on each bar marks the median.

Summary: ROCKWOOL LIMITED

What kind of company is it?

ROCKWOOL LIMITED is a private limited company registered with Companies House under company number 00972252. It was incorporated on 12 Feb 1970. Its status is active. The registered office is in Bridgend (CF35). Its nature of business (SIC 2007) is manufacture of other non-metallic mineral products n.e.c. (23990).

How is the company doing financially?

The latest accounts in the database are for 2025 (period ending 31 Dec 2025); the company files full accounts. Turnover was £269,581,000. Net assets were £162,437,000, up 6.8% on the previous year. Cash at bank and in hand was £11,148,000. Total assets were £215,270,000 and total liabilities £49,087,000. The company had an average of 565 employees. Figures are available for 2 financial years (2024–2025).

How does it compare with similar companies?

Compared with 284 active companies whose first SIC code is 23990: By net assets it ranks higher than 99% of them (median £56,662). By total assets it ranks higher than 99% of them (median £277,292). By cash it ranks higher than 98% of them (median £82,003). By number of employees it ranks higher than 97% of them (median 2). It is older than 96% of them (median age 12.5 years).

Does it supply the public sector?

The company is named as a supplier in 2 public contract award notices from 2 public sector buyers since 2018. 2 of the awards are shared with other suppliers, typically framework agreements. It is recorded as the recipient of 2 central government grants worth £182.2k, mainly from Department for Business, Energy and Industrial Strategy.

What do public registers and reports show?

It appears on the Home Office register of licensed sponsors (Global Business Mobility: Senior or Specialist Worker, Skilled Worker). HMRC lists it as an importer of goods, mainly mineral fuels and oils, inorganic chemicals, paints, dyes and inks. HMRC lists it as an exporter of goods, mainly stone, plaster and cement articles, iron and steel, iron and steel articles. In its latest payment practices report it took an average of 32 days to pay suppliers, and 17% of invoices were not paid within agreed terms. Its gender pay gap report for 2025/26 shows median hourly pay for women 6.9% lower than for men. It has modern slavery statements on the government registry for 7 years.

Who runs and controls the company?

One person with significant control is registered. 1 of 1 registered charges are outstanding.

When are its next filings due?

The next accounts are due by 30 Sep 2027. The next confirmation statement is due by 19 May 2027.

Filed accounts2024–2025
2024 †2025 †
Turnover268,430,000269,581,000
Cash at bank and in hand7,980,00011,148,000
Total assets198,397,000215,270,000
Total liabilities44,513,00049,087,000
Net assets / total equity152,027,000162,437,000
Average number of employees599565

A dash (—) means no accounts were filed for that year or the item is not in the accounts; 0 is a zero stated in the accounts. Small companies usually file only a balance sheet, so the profit and loss account is often missing.

Public contracts

2 contracts

ROCKWOOL LIMITED is named as a supplier in 2 public contract award notices from 2 public sector buyers since 2018. 2 awards are shared with other suppliers.

Contracts per year
Main buyers2
Department for Business, Energy & Industrial Strategy
1 contract
L&Q Construction
1 contract
Contracts
  1. CONTRACT FOR THE PROVISION OF INDUSTRIAL HYDROGEN ACCELERATOR STREAM 2A TO THE DEPARTMENT FOR BUSINESS, ENERGY AND INDUSTRIAL STRATEGY Department for Business, Energy & Industrial Strategy · shared by 9 suppliers, up to £2,946,970 in total
  2. London and Quadrant Housing Trust - Insulation Framework 2018 - 2020 - AWARD‡L&Q Construction · shared by 5 suppliers

From contract award notices on Contracts Finder (since 2016) and Find a Tender (since 2021), published by the Cabinet Office under the Open Government Licence v3.0. Values are as published by the buyer and usually cover the whole contract term; the total leaves out awards shared between several suppliers, where the published figure is a ceiling for all of them, placeholder values and single figures of £1 billion or more. Notices marked ‡ do not state a company number and were linked by an exact match on the registered name. Contracts below the publication thresholds and those of devolved buyers that publish elsewhere are not included.

Government grants

2 grants

ROCKWOOL LIMITED is recorded as the recipient of 2 central government grants since 2021, together worth £182.2k.

Funders
Department for Business, Energy and Industrial Strategy
1 grant · £136.7k
Department for Science, Innovation and Technology
1 grant · £45.4k
Grants
  1. Installation of ORC at Wern Tarw siteDepartment for Business, Energy and Industrial Strategy · £136,744 · UKRI - Innovate - Scheme 21/22
  2. Installation of ORC at Wern Tarw siteDepartment for Science, Innovation and Technology · £45,413 · UKRI - Innovate UK - Scheme

From the Government Grants Register published by the Cabinet Office (financial years 2016/17 onwards, Open Government Licence v3.0). It covers grants from central government departments and their agencies where the register states the recipient's company number and the recipient name matches this company; grants from local authorities, lottery distributors and devolved governments are not included.

Statutory reporting

Payment practices1 Jan 2026 – 30 Jun 2026
Average time taken to pay invoices
32 days
Invoices not paid within agreed terms
17%
Standard payment terms
13–60 days
Member of a payment code
No
  • Within 30 days 54%
  • 31 to 60 days 42%
  • After 60 days 4%
Earlier periods (7)
Period ending
Days to pay
Within 30 days
Late
31 Dec 2025
33
53%
15%
30 Jun 2025
32
54%
13%
31 Dec 2024
32
51%
11%
30 Jun 2024
33
52%
16%
31 Dec 2023
33
51%
15%
30 Jun 2023
32
50%
17%
31 Dec 2022
35
48%
17%

View the latest report on GOV.UK

Gender pay gap2025/26
Median hourly pay
women 6.9% lower
Mean hourly pay
women 2.8% lower
Median bonus pay
women 9.9% lower
Employer size
500 to 999 employees
Lower pay quarter30.6% womenLower middle12.3% womenUpper middle15.1% womenUpper pay quarter19.9% women
Earlier years (8)
Year
Median hourly pay
Mean hourly pay
2024/25
women 5.8% lower
women 2.9% lower
2023/24
women 5.2% lower
women 1% lower
2022/23
women 9.6% lower
women 5.2% lower
2021/22
women 5.5% lower
women 1.9% lower
2020/21
women 3.8% lower
women 1.9% lower
2019/20
women 5.4% lower
women 5.6% lower
2018/19
women 6.5% lower
women 5.7% lower
2017/18
women 7.5% lower
women 9.3% lower

A positive gap means women's average hourly pay is lower than men's across the whole employer; it is not a comparison of pay for the same work. View on the Gender pay gap service

Modern slavery statements7
2026
Statement · summary on GOV.UK
2025
Statement · summary on GOV.UK
2024
Statement · summary on GOV.UK
Earlier years (4)
2023
Statement · summary on GOV.UK
2022
Statement · summary on GOV.UK
2021
Statement · summary on GOV.UK
2020
Statement · summary on GOV.UK

Figures the company reported itself to the government's Check payment practices service, Gender pay gap service and Modern slavery statement registry (Open Government Licence v3.0). Only large companies and employers with 250 or more staff have to report, so most companies have nothing here.

Registers and licences

Sponsor licence‡
Licence type and rating
Worker (A rating)
Routes
Global Business Mobility: Senior or Specialist Worker, Skilled Worker

On the Home Office register of licensed sponsors, which lists organisations licensed to sponsor workers from overseas.

International trade‡

Listed by HMRC as an importer of goods in 12 of the last 12 months on record, most recently August 2026. Main goods: mineral fuels and oils, inorganic chemicals, paints, dyes and inks, plastics and stone, plaster and cement articles.

Listed by HMRC as an exporter of goods in 12 of the last 12 months on record, most recently August 2026. Main goods: stone, plaster and cement articles, iron and steel, iron and steel articles, paints, dyes and inks and machinery.

From HMRC's monthly lists of importers and exporters. Traders can ask to be left off the lists, so absence does not mean a company does not trade.

Sources: Charity Commission for England and Wales, Care Quality Commission, Home Office and HM Revenue & Customs, under the Open Government Licence v3.0. Entries marked ‡ come from lists that do not state a company number and were linked by an exact match on the registered name.

History

4 events
  1. Financial year 2025 endedAccounts: turnover £269.6m, net assets £162.4m, 565 employees
  2. Financial year 2024 endedAccounts: turnover £268.4m, net assets £152m, 599 employees
  3. Rockwool A/S registered as a person with significant control
  4. Company incorporatedPrivate limited company

Dates as recorded at Companies House: incorporation, name changes, officer appointments and resignations, current persons with significant control, and the end of each financial year with figures in the database. Former persons with significant control are not listed.