Rule 506 is the most commonly used Regulation D safe harbor for private offerings, with two main paths: Rule 506(b) (no general solicitation, limited non-accredited participation) and Rule 506(c) (general solicitation allowed with accredited investor verification). In venture financings, Rule 506 is the standard exemption used for priced rounds and many SAFEs/notes, and Rule 506 offerings typically require Form D filings and state notice filings.
