What is an SEC Form D filing?

Form D is the notice a company must file with the SEC within 15 days of first selling securities in a private placement under Regulation D — the exemption behind most US startup rounds and fund closes. It discloses the amount offered and sold, the exemption used, and the company's officers and directors.

Because the deadline runs from the first sale, Form Ds routinely surface raises before any announcement — and for companies that never announce, the filing is the only public record. Amounts are 'sold so far' and can grow in amendments.