- Kacper Pempel/Reuters
- Capital One‘s data breach puts the company on a long list of firms that have fallen victim to hackers exploiting data on millions of people.
- Since 2008, there have been eight data breaches that have each affected more than 100 million individuals.
- Here are the eight largest hacks of the 21st century, and how the company’s stock price reacted.
- Visit the Markets Insider homepage for more stories.
The hack exposed the personal information of more than 100 million people across the US and Canada. The company said a former Amazon Web Services engineer was able to exploit one of Capital One’s AWS servers to access the data.
Customers and small businesses that applied for one of Capital One’s credit products between 2005 and early 2019 were impacted. According to a statement from the company, about 140,000 social security numbers and around 80,000 linked bank accounts were also compromised.
Shares of the credit-card issuer fell as much as 8% as the breach sparked worries about the reputational damage to the company.
But Capital One is far from the first company to experience a major major data breach. Below are the eight largest hacks of the 21st century, listed in increasing order of people affected. Each one wound up impacting more than 100 million individuals.
We’ve also provided the stock price reaction in each instance.
8. Capital One
- Roman Tiraspolsky / Getty Images
Date: July 2019
Number of people affected: 106 million
Data released: Names, addresses, self-reported income, phone numbers, and some credit status data including credit balances and limits, payments, and transaction history
Stock price impact: 7% drop on July 30, the day the hack was announced
- Getty/Helen H. Richardson
Date: December 2013
Number of people affected: 110 million
Data released: Credit/debit card and contact information
Stock price impact: 14% drop between December 2013 and February 2014
6. Heartland Payment Systems
- Joe Raedle/Getty Images
Date: March 2008
Number of people affected: 134 million
Data released: Credit card information
Stock price impact: N/A
- Thomson Reuters
Date: July 2017
Number of people affected: 143 million
Data released: Social security numbers, birth dates, addresses, and some drivers licenses numbers
Stock price impact: 34% drop between July 2017 and September 2017
- Getty/Ki Price
Date: May 2014
Number of people affected: 145 million
Data released: Names, addresses, dates of birth, and passwords
Stock price impact: 7% drop between May 2014 and June 2014
3. Adult Friend Finder
Date: October 2016
Number of people affected: More than 412 million
Data released: Names, email addresses, and passwords
Stock price impact: N/A
2. Marriott International
Number of people affected: 500 million
Data released: Names, contact information, credit card numbers, passport numbers, Starwood Preferred Guest numbers, and travel information
Stock price impact: 14% drop from November 2018 (when the hack was discovered) to December 2018
- REUTERS/Robert Galbraith
Number of people affected: 3 billion user accounts
Data released: Names, email addresses, dates of birth, and phone numbers
Stock price impact: At the time Yahoo wasn’t a public company, but was in the process of being sold to Verizon. The hack slashed an estimated $350 million off the company’s sale price.