Form S-3
A short-form SEC registration statement that lets established public companies raise capital quickly, including through shelf offerings.
A Form S-3 is a simplified registration statement that eligible public companies use to register securities for sale. It incorporates much of the information already in their periodic reports, so it can be used quickly. A shelf registration lets a company sell securities over time without filing a new statement for each sale.
On our site, S-3 filings are listed with the offering type. A shelf is a capacity, not a sale; check the prospectus supplement for the actual terms.
Traders care because a new S-3 can signal that a company may issue equity, which dilutes existing shareholders. Offerings often price at a discount to the market price.
Worked example (illustrative numbers, not real data): a company with 100 million shares files a shelf for up to 1 billion dollars. If its stock trades at 50 dollars, the shelf covers up to 20 million new shares, or 20 percent dilution if fully used. Actual sales could be smaller or come later.