Sears, Kmart owner: There's 'substantial doubt' about company survival

The parent company of Sears, once the nation's largest retailer, issued a somber warning Tuesday about its survival.

According to USA Today, Sears Holdings, which also owns Kmart, broke the news in an annual report filed with the Security and Exchange Commission.

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"Our historical operating results indicate substantial doubt exists related to the company's ability to continue as a going concern," the company said.

According to The New York Times, Sears Holdings lost $2.2 billion last year. Sears reported a 9.3 percent decline in sales, while Kmart's sales dropped 7.4 percent, Fortune reported.

Earlier this year, Sears Holdings said it would shutter 150 Sears and Kmart stores in 40 states.

Explore>> Which Sears, Kmart stores will be closing? Here's a list