Styleguide owners can transfer the ownership of their styleguides from both the Mac and the Web apps, directly from the “Styleguides” tab by clicking on the settings icon that appears when you hover over it.
Transferring a personal styleguide to your Organization
If your team is on the Organization plan, you can transfer your personal styleguide to that organization from the “Styleguides” tab.
Hover over a styleguide under your “Personal Workspace”, click on the settings icon. You'll see the name of your organization after you click on the “Transfer Ownership” option.
☝️ You can only transfer a project if your role is Editor, Admin or Owner in the organization.
When you transfer a parent styleguide, all the child styleguides will also be transferred without losing their parent-child relationships.