Business Owners Policy (BOP) that combines LLCs across states

[Frank Mancuso]

I had an experienced insurance agent say I could put all properties under a single BPO that are across states (some owned by LLCs and some not). 

Has anyone done this or familiar?  

I originally requested 1 policy per "business" (either LLC or sole proprietorship) and was surprised when he came back and said I could add everything under one policy and add the other LLCs as "named insureds"

Looking for best practice and real life experience.