OpenAI is the maker of ChatGPT and the GPT model family, serving roughly 900M weekly active users with 50M+ paid subscribers — it filed its S-1 on June 8, 2026 ahead of a planned IPO.

GPU-as-a-service cloud provider delivering NVIDIA-based compute clusters for AI training and inference to underserved mid-market and enterprise customers, pursuing a Nasdaq direct listing under ticker QMLS.