0001547903 2021-09-09 2021-09-09 0001547903 false 8-K 2021-09-09 NMI Holdings, Inc. DE 001-36174 45-4914248 2100 Powell Street 12th Floor Emeryville CA 94608 855 530-6642 false false false false Class A Common Stock, par value $0.01 NMIH NASDAQ false