Change the Owner of a Query
In order to change the owner of a query, click on the checkbox to left of the query name and click Change Owner. Upon clicking Change Owner link, a popup will appear that shows all of the users to whom you can assign the selected query to. Once you select a user from the drop-down presented and confirm, that user will become the new owner of the query. Only owner of the query can perform this operation.
You can alternatively click on the query name to get to the query edit screen and then select a user from the Owner drop-down presented below and hit Save.