Kioxia Shares Slump 12% as OpenAI IPO Delay Concerns Trigger Broader AI Stock Selloff Across Memory and Supply-Chain Equities

Japanese NAND flash maker Kioxia saw its shares fall 12% on Friday amid a broader AI-related selloff triggered by reports that OpenAI is considering delaying its IPO until 2027. The sell-off spread across AI supply-chain equities, illustrating how tightly coupled AI-infrastructure stocks have become to US lab monetization timelines. SoftBank — which holds a major OpenAI stake — fell 13% on the same news, and the contagion extended to Japanese and Korean memory names.