Eccentricity of remaining planetesimals as a function of semimajor axis at t = 300 kyr for each gas profile and Saturn growth timescale for our two-planet model. The dotted line represents Jupiter-crossing orbits, the dashed line represents Saturn-crossing orbits. The color represents the planetesimals’ formation location, with cooler colors representing earlier loss and yellow for those that remain. The more gas in the simulation, the more easily the planetesimals are circularized (lower final e). The cluster of purple points near ~7 au represents planetesimals trapped near Saturn’s orbit; these bodies are dynamically influenced by the planet and are likely to be absorbed into its circumplanetary disk over time.