https://www.reuters.com/article/us-uber-cyberattack/uber-ceo-says-company-failed-to-disclose-massive-breach-in-2016-idUSKBN1DL2UQ

Uber Technologies Inc [UBER.UL] failed to disclose a massive breach last year that exposed the data of some 57 million users of the ride-sharing service, the company's new chief executive officer said on Tuesday.