Do I need an APO to publish my app or component on AppExchange?

No, you no longer need an AppExchange Publishing Organization (APO) to publish your app or component on AppExchange. You can now connect the organization where you developed the app or component directly to AppExchange publishing console. To connect an organization, open the Publishing page in the Partner Community, and click the Organizations tab. Before connecting an organization, make sure that you have the “Manage Listings” permission in the Partner Community.