UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 NORTH DAKOTA 81-2683619 (State or other jurisdiction of (IRS Employer incorporation or organization) Identification No.) 1101 First Avenue North Fargo, North Dakota 58102 (Address of principal executive offices) (Zip Code) (701) 298-4200 Registrant's telephone number, including area code Not A ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ____ to _____ Commission file number 001-37973 NI HOLDINGS, INC. (Exact name of registrant as specified in its charter) NORTH DAKOTA (State or other jurisdiction of incorpora ...