Glossary
Lock-up period
The window after an IPO during which insiders and pre-IPO investors are barred from selling shares, typically 180 days.
Lock-ups prevent a flood of insider selling in the first months of trading. Anthropic's filing restricts most holders for 180 days and founders and large holders for up to 365, with some early release if price conditions are met after an earnings report. Lock-up expiries are among the biggest scheduled events for a newly listed stock with a small free float.
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