A small float is only small until the company decides otherwise. Every mechanism for making it bigger is disclosed in advance, and most traders never look.
The mechanisms, worst to best
| Structure | What it is | What it does to a move |
|---|---|---|
| Priced offering | Shares sold at a set price, usually below market, often with warrants | Caps it immediately. The offering price becomes resistance. |
| ATM active | An at-the-market programme selling into open-market strength | Sells into every rally. Strength is the trigger for supply. |
| Shelf on file | An effective S-3 permitting future sales, not yet used | Latent. Becomes real with no warning. |
| Warrant overhang | Outstanding warrants that convert above a strike | Adds supply at a known price. Look up the strike. |
| Shelf exhausted, no ATM | No current legal mechanism to issue | Genuine scarcity. This is what you actually want. |
Where to look
- 1.424B5: the prospectus supplement for a priced offering. If one landed in the last five sessions, the move has a ceiling.
- 2.S-3 / F-3: the shelf. Check whether it is effective and how much capacity remains.
- 3.10-Q, liquidity note: months of cash at the current burn. Under six months and an offering is a matter of when.
- 4.8-K, item 3.02: unregistered sales. Frequently the first sign.