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).
Testing: NX 11 | NX 12 | TCIN
TC 11.2 | TC Vis 11.3 | AWC 3.2
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.