Marriott Faces $124 Million Fine From U.K. for Data Hacking (2)

The massive hacking of Marriott International Inc. reservation databases could lead to a 99 million-pound ($124 million) fine as the U.K. cracked down on privacy breaches with its second major penalty notice in two days.

The cyber attack, which Marriott disclosed last year, exposed information on 339 million guest records, including 7 million related to British residents, the U.K. Information Commissioner’s Office said in a statement July 9. It’s the second time in two days the regulator has taken advantage of far-reaching European Union powers after proposing a 183.4 million-pound penalty against British Airways.

The proposed fine also highlights an ...