S-3 Shelf Checker

An effective S-3 shelf lets a company sell new shares at almost any time — with no new SEC review — which can crash a small-cap fast (often a halt-down). Enter a ticker to see if one is active.

Why it matters: shelf takedowns (a 424B5 filing) and at-the-market (ATM) programs are how small companies raise cash by issuing stock. If float is under $75M, the SEC’s “baby-shelf” rule caps sales to ~1/3 of float per year — still meaningful dilution.