Initial radial distribution of compositional endmembers at t = 0.0 Myr in our simulations corresponds to the early epoch of planetesimal differentiation, which occurred approximately ~1–2 Myr after the formation of CAIs. EF and EC materials are separated at the leftside two-fifths division point of the Gaussian annulus (a=0.9747 AU), while the EC and OC boundary is defined at the right-side one-fourth division point (a=1.0674 AU). The OC/CI transition is located at 2.0 AU. Colored points denote different compositional tags, and the gray curve (right axis) shows the normalized number-density distribution of planetesimals.