PROSPECT, the Precision Reactor Oscillation and Spectrum Experiment, is a multiphase short baseline reactor antineutrino experiment that aims to probe eV-scale sterile neutrinos and precisely measure the antineutrino spectrum generated from a Highly Enriched U-235 (HEU) reactor. In Phase-I, a 3-ton movable optically segmented Li-6 loaded liquid scintillator (LiLS) detector will be deployed at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory (ORNL) at baselines ranging from 7-12m. With an energy resolution of < 4.5% at 1 MeV and a daily interaction rate of about 700 antineutrinos. PROSPECT will make the highest to date precision measurement of an HEU reactor spectrum. In this poster, we describe PROSPECT’s spectral measurement and its ability to shed light on the recently observed spectral discrepancies observed in the θ13 reactor experiments.