Grouping specific rows
 

I have a sheet containing company names and addresses, The company names are
listed in Column A with their addresses in the rows underneath. ie 1st
Company name in Row 2, 2nd company name in Row 6 and so on The contact at
that company is detailed in Column B. I would like to sort the Company names
into alphabetical order or group them by company name, then sort them,anyone
help please?