TradingKey – SoftBank Group Corp (TSE: 9984, all prices in Japanese yen) slid as much as 13% on June 26 to ¥6,132, wiping out weeks of gains, after a report by the New York Times said that OpenAI is leaning toward postponing its first public offering (IPO) until 2027. That drop in SoftBank’s stock comes amid a direct line to its stake in OpenAI, which is on track to total around $65 billion in October 2026, and a recent run in SoftBank shares, which had been boosted by hopes of a payday from OpenAI’s eventual listing, helped push the holding company’s market value to record levels above that of Toyota Motor Corp.

The delay report is not a corporate failure. OpenAI filed a confidential S-1 with the SEC on June 8, its business…