Does anyone know if there are standard reports or sessions for reporting inventory stock turns by warehouse and by company?

Yes in the warehouse management reports, you would find them

Hello,

I'm not sure about Baan V, but in ERP LN you have a "Perform Slow Moving Analysis" (whina6220m000) session which will calculate the Inventory Turns and assigns a percentage based on the predefined data from the Parameters.

Try and let me know if you have any queries.