All kind of organizations and companies can broadcast through the Alyx & Yeyi shortwave facilities.
In most cases, the organization does not need to have its own broadcast license.
Acceptable organizations include governmental organizations, public broadcasters, religious organizations, commercial broadcasters, free radio stations, pro-democracy organizations, non-profit and non-governmental organizations.
To give you an idea about who is broadcasting on shortwave, you can find an overview of radio stations that broadcast on shortwave at Shortwave Radio Broadcast Stations.