I see there is an Extra for Softimage Subscription customers. It’s a plugin that adds two commands for exporting CrowdFX:
Export Crowd as FBX (Null Rig) – Exports a null rig for each actor including the animations created by the crowd simulation
Export Crowd as FBX (Null Rig and Geometry) – In addition to the null rig, it exports one geometry per actor enveloped to the null rig
There’s some docs on the Documentation tab in the Sub center.