The York Press and BHP Chartered Accountants analysed the data from more than 4,000 small and medium sized enterprises in the area and produced a definitive Top 50 list, based on pre-tax profits.
According to The York Press the Top 50's turnover had grown by £11m since last year, but the group collectively employs 3,191 - down almost 1000 employees from 2015.
However Green-tech managing director Rachel Kay said she was "delighted" that the company has bucked that trend.
"Our staff numbers have risen dramatically since 2015 and we have plans to continue recruiting throughout 2016. We have recruited an additional seven members of staff so far this year and we currently have another four positions that have been newly created to help us meet our ambitious growth strategy."
Green-tech recently moved into its own newly-built £3m business park, on the outskirts of Boroughbridge in North Yorkshire which gives added capacity to increase output and staff numbers.