OpenAI closes the largest private round ever: $122B at an $852B valuation

OpenAI announced $110B on February 27 at a $730B pre-money valuation, then took another $12B in March to close at $122B and $852B post-money. Amazon, Nvidia and SoftBank anchored the round alongside a16z, D.E. Shaw, MGX, TPG and T. Rowe Price. The money funds the Stargate compute buildout; for builders it locks in OpenAI as a vertically integrated platform for years.