1. Confidential filing– what’s really being hidden
“The contents themselves contain a lot of detailed information about the internals of the company including financials, revenue, ownership details etc... those details are what’s confidential until the SEC gives its approval, at which point Anthropic will release that document to the public and IPO.” – Maxatar
2. Index‑fund fast‑track & retail exposure
“What this means it that it won’t survive scrutiny, so better hide it so that there is only a small amount of time to do it.” – outside1234
3. AI bubble & crash risk
“This is actually the pin everyone was looking for that will pop this AI bubble, including the token cost falling in China and the release of open models that are good and run locally.” – rvz
4. Profitability & valuation doubts
“It could be, but the market could bounce right back… Anthropic could end up like Amazon, or it could end up like Yahoo.” – bensyverson
5. IPO timing, lock‑up & incentive to rush
“Because you want another funding round but you will get it only if investors think they’re going to get their money back soon.” – iLoveOncall
6. Corporate ethos & public scrutiny > “I gather most of the ethos behind Anthropic is ‘we don’t want to work with Sam’.” – Arubis