I think Cerebras stock going down could also be partly caused by the lock-up period ending today for 200k shares (page 73 of their prospectus) - https://www.sec.gov/Archives/edgar/data/2021728/000162828026...

It doesn’t seem like it? Unless I am misunderstanding these Nasdaq insider trading reports: https://www.nasdaq.com/market-activity/stocks/cbrs/insider-a...