A Practice Note reviewing the integration framework of Rule 152 under the Securities Act of 1933 and the application of the framework to multiple securities offerings. It describes the purpose of the integration doctrine and the provisions of Rule 152 , which apply to exempt and registered offerings and provide a general principle of integration and four non-exclusive safe harbors from integration. This Note also describes the application of Rule 152 to various combinations of two or more exempt offerings and two or more exempt and registered offerings.