The first Sloan Research Fellowships were awarded in 1955. Since that time, more than five thousand outstanding early-career researchers have received the award. Originally awarded in physics, chemistry, and mathematics, the Sloan Research Fellowships have expanded over the decades to include the support of early-career researchers in a total of eight scientific and technical fields. For each fellow, this database lists the fellow’s name, the field the fellowship was awarded in, the year of his or her award, and the fellow’s institutional affiliation at the time of the award. Each year’s fellows are announced in February and added to this database in April. (Note: fellows may have moved institutions since receiving the award.)