Sigma posted on their Facebook page in the Czech Republic that they will no longer make lenses for Pentax K-mount (Google translation):
“Sigma today apparently causes the thinning community of Pentax users, since it decided to completely end the production of lenses with bayonet Pentax during the autumn Instead, it is planning to focus more on developing and supporting the mirrorless systems in which they see the future.”
The currently available Sigma lenses for Pentax K-mount can be found at Adorama and B&H.
