Japanese cryptocurrency exchange Coincheck announced today that it lost over 500 million NEM tokens, worth over $500 million. The company admitted to being hacked earlier today in a conference with local media. Officials are currently pondering a method of compensating some of the users who suffered losses. NEM trading price dropped from $1 to $0.8 following the hack announcement. It is believed the hacker stole almost 7% of all NEM token tokens currently in circulation. Kaspersky researcher Costin Raiu also pointed out earlier today that the exchange also moved $110 million worth of Ripple (XRP) cryptocurrency after the hack.
Source: https://www.bleepingcomputer.com/news/cryptocurrency/coincheck-loses-500-million-in-biggest-cryptocoin-hack-ever/