CEO listed himself as his own supervisor on SF86

Hello. I am the FSO for a very small company. My CEO is up for a T3R. He put his own name in the field for supervisor name. (He technically does not have a supervisor.) I know it’s weird, but I’m not sure what to advise him about what to put that field instead of his own name. Has anyone else encountered this? Would appreciate any advice.

One of the other company officers or someone that can talk about his employment.

That sounds like a good idea. Thank you very much.