The new issue of Kodansha's Afternoon magazine announced that the manga ends on September 25th.
The creator of the work Nihei Tsutomu launched the manga in 2009, where Kodansha published the 14th volume in February. Nihei had already left clues that the manga was already reaching its climax.
Shidonia no Kishi had two seasons, the first premiered between April and June 2014, and the second season arrived in April of that year, titled Knights of Sidonia: Battle for Planet Nine, being shown with Portuguese dubbing on the beloved Netflix, soon after from the end of its exhibitions in Japan.