As stated by CARL-ABRC (The Canadian Association of Research Libraries):
"Research data may be defined as the factual records (e.g. microarray, numerical and textual records, images and sounds, etc.) used as primary sources for research, and that are commonly accepted in the research community as necessary to validate research findings.
For the most part these data are born digital, and stored and managed electronically, making them easy to share, replicate, and combine with other data. However, in order to share and reuse data, they must be created and maintained in a manner consistent with the goal of long-term preservation. This involves active data management throughout the life-cycle of the data, beginning at the time they are first envisioned."
Answer: Everyone.
"The three federal research funding agencies—the Canadian Institutes of Health Research (CIHR), the Natural Sciences and Engineering Research Council of Canada (NSERC), and the Social Sciences and Humanities Research Council of Canada (SSHRC) (the agencies)—have developed a draft Tri-Agency Research Data Management Policy, which aims to support Canadian research excellence by fostering sound digital data management and data stewardship practices. The policy includes suggested requirements related to institutional data management strategies, researcher data management plans and data deposit."
From Research Data Management via science.gc.ca.
