Publicly traded companies suffering the worst data breaches averaged a 7.5 percent decrease in stock price, a Bitglass report reveals.

Bitglass researched the three largest data breaches of publicly traded companies from each of the last three years in order to uncover cybersecurity trends and demonstrate the extensive damage that can be done by improper security. Among the incidents detailed in the Kings of the Monster Breaches report are the Marriott breach of 2018, the Equifax breach of 2017 and the Yahoo! breach of 2016.