Demand registration rights, where an investor can force a company to file a registration statement to register the holder’s securities so the investor can sell them in the public market without restriction.

Piggyback registration rights, where the investor is entitled to register its securities when either the company or another investor initiates the registration. Holders of piggyback rights are allowed to include their securities in a registration initiated by the company or another investor. This type of registration right is seen as inferior to demand registration rights, because holders of piggyback rights cannot initiate the registration process.

Practice Note, Registration Rights Agreement for Rule 144A and Regulation S Offerings: Understanding the Terms.

Practice Note, What are Registration Rights Agreements?.

Article, Revised Rule 144 and Registration Rights: Market Practice Two Years On.

Standard Document, Registration Rights Agreement (Section 4(2) Private Placement Form).