HHMI James H. Gilliam Fellowships for Advanced Study
HHMI url  https://www.hhmi.org/developing-scientists/gilliam-fellowships-advanced-...
Last year's program announcement  https://www.hhmi.org/sites/default/files/g18_programannouncement_122017.pdf

As of 8/21/2018:
"We [HHMI] will be posting the updated program announcement on the site about the 2019 competition shortly.

However, the dates on the site should be updated to reflect the 2019 competition:
Program Dates
October 2018: Nomination Deadline
January 2019: Application Deadline
June 2019: Award Notification
September 1, 2019: Fellowship Start Date

Megan Katz,  Program and Special Projects Coordinator
Undergraduate and Graduate Programs
Gilliam Fellowships for Advanced Study"