Sloan Foundation Research Fellowships  https://sloan.org/fellowships/?L=0

Limitation:  Candidates must be nominated by a department head or other senior researcher. Submissions unaccompanied by a nomination from a senior researcher are not accepted. More than one candidate from a department may be nominated, but no more than three.

Deadline for UIowa applicants:   Application materials should be routed through your department and to the Division of Sponsored Programs by September 6, 2019.  All nomination materials, including nomination letters and all letters of support, must be submitted online to the sponsor by September 16, 2019.