Once you've uploaded your Sponsors/Exhibitor companies into Hubb, you can edit them through the Sponsor & Exhibitor dashboard.
Select the Sponsor & Exhibitor role in the top-left hand corner:
This will take you to the Sponsor & Exhibitor portal. From here, click on Companies > All Companies:
From here, scroll or search for the name of the company you wish to edit:
Click the Edit button in the top right-hand corner of the screen:
From here, you can make changes to a wide variety of company details. As always, click Save when you're finished.