Citadel and Citadel Securities founder Ken Griffin speaking to the audience on Saturday night.
Ken Griffin.
  • Billionaire Ken Griffin donated $20 million to Miami Dade College to launch a new scholarship.
  • In a commencement address at the college, he told graduates to find solutions to America's problems.
  • Earlier this month, Griffin gave $300 million to his alma mater Harvard University.

Ken Griffin's South Florida spending spree has now benefited a college where more than half the students are from low-income households. 

On Saturday, the billionaire founder of hedge fund Citadel donated $20 million to Miami Dade College, one of the country's largest and most diverse schools.