Having made light-blocking ventilation equipment to keep factories safe during Second World War blackouts, Colt now designs and services smoke control, ventilation, climate control and solar shading for its clients. The group’s climate technology sector grew in 2016 with increased demand, particularly in Europe, for environmentally sustainable buildings and infrastructure. Still owned by the founding O’Hea family, the Hampshire firm is led by chief executive Mark Oliver, 55.

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Company details
Year2017
Rank168
CompanyColt
ActivityVentilation systems provider
LocationHampshire
Sales £m158.2
Operating profit £m7.5
Main shareholdersO'Hea family (78%), Colt Foundation (22%)
Staff994
Founded1931
Websitewww.coltgroup.com

If applicable:

* supplied by Company   † annualised figure   ‡  profit = ebitda