Another option is to use the grid ItemDataBound event... You can place the below code in the ItemDataBound event:

e.Item.Cells(0).Text = "<a href=CompanyData.aspx?CompanyID=" & e.Item.Cells(9).Text & "&IndexTypeID=" & e.Item.Cells(10).Text & ">" & e.Item.Cells(9).Text & "</a>"

That code would change column 0 to a hyperlink using columns 9 & 10 for the parameters... You can then make 9 and 10 invisiable. ItemDataBound can be used for putting images, colors and a number of other things in a grid extremely easy.