See this example properly formatted in the QUT Cite tool.
Standard in-text citation examples are in Getting started - In-text citation.
Author AA. Title [Internet]. Place of publication: Publisher; Year Month [cited Year Month Day]. # p. Report No.: #####. Available from: http://www.xxxxxx.xxx.xxx.xx
 Australian Institute of Health and Welfare. A picture of overweight and obesity in Australia [Internet]. Canberra (ACT): Australian Institute of Health and Welfare; 2017 Nov [cited 2017 June 21]. 60 p. Available from: https://www.aihw.gov.au/reports/overweight-obesity/a-picture-of-overweight-and-obesity-in-australia/contents/table-of-contents
Put the organisation or government department as the author if no individuals are listed.
If the report doesn't have a number, leave this out.
For reports relating to market and company research see Government and corporate documents - Industry report.