Ken Griffin, the billionaire founder of Citadel Investments, plans to donate $1 million to President-elect Donald Trump's inauguration fund after refusing to donate to his campaign during this year's election. Mr. Griffin has made similar donations before, including for Mr. Trump's 2017 inauguration and Mr. Biden's 2021 inauguration. "I'm sure you'll see me listed as an inauguration donor again," he said on Monday after attending a Miami-Dade City League event.