Currently RadListView does not provide built-in sticky group headers - we have it logged as a feature request in our public portal, you could cast your vote and track its status at the link below:
ListView: Add frozen group headers
Let me know if you have any additional questions on RadListView control.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items