Hey Aj - I am a commercial insurance agent with lots of experience covering apartments, lets talk about your current coverage and see if there is room to improve. Just shot you a connection request.
Aj, for a 12-unit the number mostly moves on the usual underwriting list: roof age, when the electrical, plumbing and HVAC were last updated, 5 years of loss runs, and whether the building limit matches real replacement cost (a lot of "expensive" policies are just over-insured on the building value, and a lot of cheap ones are under-insured). Before you compare quotes, line up the same deductible, the same valuation (replacement cost vs. actual cash value) and the same liability limit, or the prices mean nothing next to each other. And ask whoever quotes it to market it to several carriers at once rather than one company's number; a 12-unit usually gets 3 to 5 real options that way.
I'm a licensed P&C broker (JM & ADA Associates) and multifamily is most of what I place. Happy to shop it for you, just message me here.