• 1983

    Winson Cleaning Service Co Ltd was initially established

  • 1993

    Winson Professional Pest Control Co Ltd was established

  • 1996

    First awarded a Tender Contract from a mass transit transportation operator in Hong Kong for provision of Environmental Hygiene Services.

  • 2000

    First obtained ISO 9001 accreditation from TÜV Rheinland.

  • 2001

    First obtained ISO 14001 accreditation from TÜV Rheinland.

  • 2002

    The Group’s annual revenue first exceeded HK$100 million.

  • 2007

    The service area of a single Tender Contract of the Group for provision of Environmental Hygiene Services in a commercial centre first exceeded 1.3 million sq.ft.

  • 2008

    First obtained OHSAS 18001: 2007 accreditation from Hong Kong Quality Assurance Agency.

  • 2011

    The Group’s annual revenue first exceeded HK$200 million.

  • 2013

    The Group commenced the provision of Airline Catering Support Services.

  • 2014

    The Group’s annual revenue first exceeded HK$300 million.

  • 2015

    The Group was awarded Honorary Certificate 2015 for 3 years of excellence performance during the sustainability projects and management process by Hong Kong Environmental Protection Association.

  • 2016

    The Group’s annual revenue first exceeded HK$400 million.

  • 2017

    Share of The Company commenced trading on the Growth Enterprise Market of The Stock Exchange of Hong Kong on 16 March 2017, under the stock code 8421.