After Canon, Sony, Fuji, Leica, and Blackmagic, Sigma is the next company to increase its prices in the US on June 2nd, 2025.
Sigma currently has 18 lenses for Nikon F-mount and 3 lenses for Nikon Z-mount.
Nikon is also rumored to increase their prices on June 1st. This is not confirmed, but I do not see how they are going to keep their prices unchanged.
Here is the full text of the statement issued by Sigma: