Mass evolution of planetesimals for collisions and pebble accretion in the giant planet region. Each line shows the growth history of a planetesimal or embryo. Bodies that grow more massive than 10⁻² M_⊕ are shown as coloured lines. The colour scales with mass and is the same as in Fig. 10. The grey lines show all other bodies. The endpoint of the simulation for each body is indicated with a circle. Because the bodies do not grow significantly before 10⁴ yr, only the later times are shown.