Peter Thiel has worn many hats over the years: Silicon Valley founder, Trump megadonor, cryptocurrency booster, democracy skeptic.

But there is yet another facet to Thiel, one that has remained secret until now: FBI informant.

In the summer of 2021, Insider has learned, Thiel began providing information as a "confidential human source," or CHS, to Johnathan Buma, a Los Angeles-based FBI agent who specializes in investigating political corruption and foreign-influence campaigns.