Colt originally made light-blocking ventilation equipment to keep factories safe during Second World War blackouts. It now designs and supplies smoke control, ventilation and solar shading for clients in 50 countries. Last year it expanded production in China to supply customers in Australia, Asia and the Middle East. Still owned by the founding O’Hea family, the Hampshire firm is led by chief executive Antoine Ligtvoet, 50.

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Company details
Year2015
Rank239
CompanyColt
ActivityVentilation systems provider
LocationHampshire
Sales £m146.0
Operating profit £m4.2
Main shareholdersO'Hea family (75%), Colt Foundation (22%), other (3%)
Staff957
Founded1931
Websitewww.coltgroup.com

If applicable:

* supplied by Company   † annualised figure   ‡  profit = ebitda