On July 3rd in Japan, the first Ultimo (機巧童子ULTIMO) volume will be released in Japan. The volume will be priced at 459yen. Page count, and ISBN have not been released yet for this volume.

On June 4th, a new Ultimo chapter will be released in Jump SQ, continuing it’s monthly release schedule in Japan. This new chapter will be extended with 46 pages with color pages. 

Updated:On July 19th, Jump SQII issue 3 will be released in Japan. This will contain a 23 page special chapter of Ultimo in it. Ultimo Chapter 0 premiered in Jump SQII issue 1.

Currently on newstands right now in the USA, the first chapter of Ultimo is being published in Shonen Jump, starting with chapter 1.

Sources: 
http://jumpsq.shueisha.co.jp/yokoku.html
http://www.animate-shop.jp/ws/commodity_param/ctc/book/shc/0/cmc/4112780