distribute wordpress theme inside of a company

Hi everyone,

I wonder if someone could explain me how the theme publishing work, more precisely how the theme’s update works.

I like to develop a theme for a company, and they like to have one parent theme which would be used on several sites with child themes.

How can I host the parent theme so the other WP installs get notified about updates and can update the parent theme as a regular update? Every theme have to be published on www.ads-software.com???

Thanks,
tomy