Free tool

Baby shelf capacity calculator

Under Form S-3 General Instruction I.B.6, an issuer whose public float sits below $75M cannot sell more than one third of that float in primary offerings over any twelve calendar months. When a company needs more than the cap allows, the shelf structurally cannot carry the raise and the balance has to be placed privately. This works out where that line falls.

The issuer

Aggregate market value held by non-affiliates. On EDGAR this is dei:EntityPublicFloat, measured at the last business day of the second fiscal quarter.
Gross proceeds of primary sales already made under the shelf in the last twelve calendar months. Resales by selling shareholders do not count against the cap.
Optional. Used to work out how much has to come from somewhere other than the shelf.

Capacity

What this is not. This is the arithmetic of one instruction, not legal or securities advice, and it does not account for every fact that bears on eligibility: registrant status, the twelve-month look-back on specific transaction types, whether the issuer qualifies to use Form S-3 at all, or a float that has moved since it was last measured. Confirm with counsel before relying on it.

Why this matters for origination

The cap is not a problem for the issuer. It is the opening.

A company under the baby shelf cap that needs real money has run out of the cheap, fast route. It cannot simply take the whole raise down off an existing shelf. The balance has to come from a private placement, and someone has to write it.

That is why the scoring rubric treats a baby shelf constraint as a positive signal worth 12 points rather than a warning. Stacked on a runway number under six months, it describes an issuer with a defined need, a defined size, and a defined instrument.

323
of the 676 issuers in the tracked universe sit under this cap
48%
of the universe, recalculated on every universe rebuild
$75M
the float threshold at which I.B.6 stops applying entirely