Plumosa fern - is it possible to encourage more bushy growth rather than just tall?

Hello! Recently got a pot for this guy. While I'm repotting I may try to split it- I want to encourage it to be more bushy. I have been reading a bit about how to encourage bushiness and it seems I could either separate it at the root so the base is wider and hope it fills in, and/or prune.

Just wanted to see if any of you had success with this or generally getting them to grow more bushy than tall. This one sits directly under a bright fluorescent light at work (less than 12 inches above the plant, maybe 8).

If you've pruned one of these, how would you recommend going about it?

Thanks!