Hi Venkat,
As per the data format and requirements mentioned by you, you can use Combo box as filter to your users to filter on Company Code.
Use "Filtered Rows" as data insertion and you can get your desired data mapped to the bar graph.
check the SCN thread http://scn.sap.com/message/14791067
There is a sample attachment in one post you can check that for you usage.
Regards,
Javed