Warren Buffett (L), CEO of Berkshire Hathaway, and Vice Chairman Charlie Munger attend the 2019 annual shareholders meeting in Omaha, Nebraska, May 3, 2019.

More than a year ago Warren Buffett looked into investing in ride-sharing company Uber, which is going public this year at a valuation above $80 billion.

But the legendary value investor passed.

"We looked at it 18 months ago or so...it was private," Buffett told a group of reporters ahead of Berkshire Hathaway's annual meeting at the CHI Health Center in Omaha, Nebraska.

When pressed further, Buffett said "I wouldn't comment on any new issue."