ARPA-E Reauthorization Act of 2017 This bill amends the AMERICA Competes Act to declare that the following categories of information collected by the Advanced Research Projects Agency-Energy (ARPA-E) from recipients of ARPA-E financial assistance awards are considered privileged and confidential and not subject to disclosure under the Freedom of Information Act: plans for the commercialization of technologies that have been developed under the award, investments provided to an awardee from third parties, additional financial support that the awardee plans to invest or has invested into the technology developed under the award or that the awardee is seeking from third parties, and revenue from the licensing or sale of new products or services resulting from the research that was conducted under the award. The bill reauthorizes the ARPA-E through FY2022.