An S-1 is a registration statement filed with the SEC before a company sells new securities. For traders, the goal is to extract three numbers fast: shares being registered, expected use of proceeds, and any selling shareholders.
You don't have to read 200 pages. Five sections carry 90% of the signal.
1. Cover page
The cover lists total shares being registered and the maximum aggregate offering price. Compare shares-registered to current outstanding — anything above 20% is meaningful, above 50% is a structural reset.
2. Use of Proceeds
Vague language like 'general corporate purposes and working capital' usually means the cash will fund operating losses. Specific milestones (Phase 2 trial, plant buildout, debt retirement) are stronger.
3. Selling Stockholders
If insiders or prior PIPE investors are registering shares for resale, the offering is a liquidity event for them, not new capital for the company. The cash never hits the balance sheet, but the float still expands.
4. Capitalization
The cap table shows pro-forma share count after the offering, including warrants and options. This is the diluted number that matters for any forward valuation work.
5. Plan of Distribution
Firm commitment = the underwriter is buying the block and reselling it. Best efforts = they'll try, no guarantee. ATM-style = drip selling over time. Best efforts on a small-cap is often a sign no real demand exists.
Red flags
Going-concern language in the auditor's report, a selling-stockholder block larger than the company issuance, multiple S-1/A amendments over months, and 'reasonable best efforts' all rhyme with one outcome: a stair-step lower.