Shelf registration
Also called: shelf, universal shelf, shelf offering, Rule 415
A registration statement, usually on Form S-3, that registers securities now so the company can sell them later in one or more offerings without filing a new registration each time.
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How it works
Under SEC Rule 415, an eligible company can register a dollar amount of securities, for example "up to $150 million of common stock, preferred stock, warrants, debt and units", and keep that registration "on the shelf". Once the SEC declares it effective, the company can take securities off the shelf whenever it chooses, typically for up to three years.
Each sale is documented by a prospectus supplement filed under Rule 424(b), most often a 424B5, which states the size, price and terms of that particular offering. The base shelf itself raises no money.
Why it matters for small caps
A shelf is the infrastructure that makes fast offerings possible. With an effective shelf, a company can launch an ATM program or price a registered direct offering overnight. Smaller companies using Form S-3 are limited by the baby shelf rule, so the amount they can actually raise may be far below the headline shelf size.
Worked example
Hypothetical: Company X files a $100,000,000 universal shelf, declared effective in March. In June it files a 424B5 for a $10,000,000 registered direct. The shelf still shows $90,000,000 of registered capacity, but if Company X has a $30,000,000 public float, the baby shelf rule limits its 12-month primary sales to $10,000,000, which it has just used.
How to spot it
Look for Form S-3 (or S-3/A amendments) and the SEC's notice of effectiveness (EFFECT). The cover page gives the maximum aggregate offering amount. Prospectus supplements filed against the shelf show how much has been used. The guide S-1 vs S-3 and the baby shelf compares the main registration routes.
Related terms
Guides that use this term
Dilution 101 · 6 min read
S-1 vs S-3 vs the Baby Shelf Rule, With the One-Third Math Worked Out
How Form S-1 and Form S-3 differ, who can use a shelf, and how the baby shelf rule caps small companies at one-third of public float per year.
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How an ATM program works, what a sales agreement and prospectus supplement say, how fast an ATM can be used, and where its sales show up later.
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A section-by-section route through a 424B5, the filing that announces a shelf takedown, with the dilution table math worked out and a checklist.
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