Jonathan Christodoro, a former managing director of Icahn Capital LP who was on Lyft's board until last month, connected the activist investor with Soros, which was worth about $550 million at the IPO price, according to the WSJ report.

It was not clear what price Soros paid for the stake, the WSJ said.

Lyft could not be immediately reached for comment.

(Reporting by Sayanti Chakraborty and Bhargav Acharya in Bengaluru; Editing by James Emmanuel and Leslie Adler)