https://phys.org/news/2018-10-yahoo-50m-massive-breach.html

About 3 billion Yahoo accounts were hit by hackers that included some linked to Russia by the FBI . The settlement reached in a San Francisco court covers about 1 billion of those accounts held by an estimated 200 million people.

Yahoo is now owned by Verizon Communications.

                                                            
                                    
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Ex-Yahoo paying $35M to settle SEC charges over 2014 hack (Update)