INTRODUCTION ACKNOWLEDGMENT The Advanced Nuclear Directory offers a sample of companies engaged in the development of advanced nuclear technologies and should not be considered a comprehensive list of this industry. All companies featured have participated on a voluntary basis and are responsible for the infor- mation provided. Inclusion of a company does not indicate endorsement by any of the directory’s sponsors. The Advanced Nuclear Directory was created in partnership between the Gateway for Accelerated Innovation in Nuclear (GAIN) and Third Way, with the help of the United States Nuclear Infrastructure Council (USNIC). *GAIN reserves the right to edit content for publishing purposes.