SoftBank's data center subsidiary SB Energy delayed its $50 billion IPO after failing to attract sufficient buyers, despite holding $439 billion in OpenAI contracts but only $139 million in revenue. Nvidia invested an additional $1.5 billion in nonvoting shares and guaranteed up to $105 billion of OpenAI's lease obligations, effectively propping up its own customer to sustain chip demand for the Stargate buildout. Multiple AI infrastructure companies delayed IPO listings the same week, suggesting private valuations face skepticism in public markets.