NX 11.0.1.mp01 | SW 2016 | TcUA 11.2.3
Select the items along with the item revisions/datasets, Edit > Change Ownership. Select the new owning user from Organization Selection Dialog. By this you can transfer the ownership of folders also (Not applicable for psuedo folders).
The change ownership command fails. I think it is because infodba has no rights to change ownership of items or datasets from a different group.
I used Workflow Designer to create a Take Ownership WF. Highlighting a bunch of Item amd running the WF does that for me.