Question: I want to say : 

> 
> Analysis **conducted at a** insurance company showed that...  
> 
>  or  
> 
>  Analysis **into a** insurance company showed that...
> 
> 
> 

What is the best way to phrase this?

Answer: 
I would make it slightly less passive:

*"An analysis performed by the insurance company ..."*

or other material to indicate *who* performed the analysis and *where* it was performed as well as the issue being analyzed. If you or your associates performed the analysis, you might phrase it:

*"An analysis performed by the authors into insurance company policies...'*
Use:

> 
> The analysis that the company made says that \_\_\_.
> 
> 
>