Form S-1(redirected from S1)
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A document filed with the SEC explaining an initial public offering of securities. Form S-1 must contain a complete description of the security and the terms of the sale. It must also include applicable information about the issuer's financial situation and applicable risk factors. This is done to protect investors from fraud.
A statement that a firm must file with the SEC before its securities can be listed for trading on a national securities exchange. This form contains information on the firm's business, financing, and directors. It also includes a description of the securities listed.