This Cheltenham-based company is known for its innovative magnetic filters that remove sludge from central heating and cooling systems, improve fuel efficiency and extend boiler life. It also makes water testing and water treatment chemicals at its laboratories in Kent. Sales to the EU reached £4.1m in 2017, under chief executive John Vaughan, 52. Adey plans to expand in America and China, with the backing of its majority owner, private equity firm LDC.

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Company details
Year2019
Rank111
CompanyADEY
ActivityHeating filter manufacturer
LocationCheltenham
2-yr av intl sales growth pa55.44%
International sales £000s4,098
Total sales £000s40,948
Staff98
Founded2003
Websitewww.adey.com

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* Supplied by company † Annualised figure