Change of Plan Sponsor - Filing Extension

[oriecat]

I need to file a 5558 extension for the 5500, for plan year ending 9/30/03. We have changed who the plan sponsor is since the last 5500, so I am not sure if the old or the new plan sponsor should file the extension.

Also, we changed the name of the plan. Which name should be on the extension form?

Thanks! Sorry if this is a simple question.