According to @StockMKTNewz, OpenAI is presented with a $500B market cap among top global companies, alongside Exxon Mobil (XOM) at $508B, Johnson & Johnson (JNJ) at $500B, and Palantir (PLTR) at $450B, source: @StockMKTNewz. The post states OpenAI is the 21st largest company, while its accompanying list shows OpenAI at No. 22 behind JNJ, source: @StockMKTNewz. For trading context, the source’s snapshot places OpenAI’s reported size near XOM and JNJ, framing relative market cap comparisons in the AI equity landscape, source: @StockMKTNewz.