GMO Says Cyber Incident Response Costs Remain Unquantified

GMO Internet Group said in an October 28 disclosure that it had not yet calculated the total cost of customer payments and other measures responding to a cyber incident. The incident concerns a desktop cloud service run by subsidiary GMO Internet, Inc.

Reported bond spread

BlockBeats, citing Bloomberg-compiled data, reported a spread of about 174 basis points on October 28 for a GMO Internet Group yen bond maturing in June 2031. That compared with about 122 basis points on October 20.

Sources: GMO’s October 28 disclosure and the BlockBeats report, published October 29, 2026, at 04:54:44 UTC.