GRAND RAPIDS, Mich.--(BUSINESS WIRE)--SpartanNash Company (Nasdaq: SPTN) will announce its second quarter 2015 financial results after the stock market close on Wednesday, August 19, 2015. The Company will host a conference call to discuss these results with additional comments and details on Thursday, August 20, 2015 at 9:00 a.m. ET. The call will be broadcast live over the Internet hosted at SpartanNash’s website at www.spartannash.com under the “Investor Relations” section and will remain av