There are many market reports covering the Master Data Management (MDM) and Product Information Management (PIM) market. Below you can find 4 of these coming from who is usually considered as the more reliable analyst houses around:
Forrester has not issued a report on the MDM market recently, but in June 2018 they published their PIM wave as told on the post There is no PIM quadrant, but there is a PIM wave.
Information Difference came out with their MDM market coverage as examined in the post MDM Vendor Landscape 2018.
Constellation Research revealed their top vendors in August as mentioned in the post Making Your MDM Vendor Longlist and Shortlist.
Gartner got their MDM quadrant finished in December as flashed in the post Movements in the Gartner MDM Magic Quadrant 2018. You will find vendor provided links to the Gartner report in the post Who Will Make the Next Disruption on the MDM Market?
PS: You can meet some of the included vendors (and some of the upcoming ones) on The Disruptive Master Data Management Solutions List.