The Brewery Manual, which aimed to survey all the working brewers in the UK.
Its researchers reckon there were 1544 "commercially operational national, regional and craft/micro brewers" in the UK last year. Of these, the vast majority - 1505 of them - were smaller producers that brewed less than 30,000 hectolitres (18,330 barrels).
They add that 60 breweries started operations during 2016. That's way down on the 100+ numbers recorded in each of the previous five years.
At the same time, there were 58 breweries that ceased operations and a few more that are still in business but are no longer brewing, which means that the total of working breweries has actually gone down since 2015.
Some observers have argued for a while now that the rapid growth in microbrewing was not sustainable, and that a period of 'rationalisation and consolidation' was on the way. Brewery Manual publisher Larry Nelson agreed, suggesting that "it could be the start of a slow contraction in brewery numbers.
"After years of rapid expansion in numbers the industry has been due for a correction," he continued. "The early numbers for 2017 openings suggest that this may be the start of a slowdown in new brewery growth.
"That isn’t necessarily a bad thing for craft. When the American craft brewing industry underwent a contraction in numbers at the end of the 1990s, demand for craft beer continued to rise year-on-year."