Just days after announcing a $1.1 billion Series G funding round, AI chip startup Cerebras Systems pulled its S-1 IPO filing without so much as an explanation. Amid growing concerns of an AI bubble, has Cerebras CEO Andrew Feldman gotten cold feet? Apparently not. Taking to LinkedIn on Sunday, Feldman apologized for the lack of transparency, and presumably any panic the decision might have caused. "On Friday, Cerebras Systems withdrew our S-1. We didn't explain why - that was a mistake," he wrote, adding that he still has every intention of taking the company public.