This report evaluates submissions received in response to a Request for Proposals for Biomolecular Simulation Time on Anton 2, a supercomputer designed and built by D.E. Shaw Research (DESRES). Over the past 12 years, DERES has made an Anton or Anton 2 system housed at the Pittsburgh Supercomputing Center available to the non-commercial research community, based on the advice of previous committees of the National Academies of Sciences, Engineering, and Medicine. As in those prior rounds, the goal of the thirteenth Request for Proposals for simulation time on Anton 2 is to continue to facilitate breakthrough research in the study of biomolecular systems by providing a massively parallel system specially designed for molecular dynamics simulations. These capabilities allow multi-microsecond simulation timescales. The program seeks to continue to support research that addresses important and high impact questions demonstrating a clear need for the special capabilities of the Anton.