Hostess Brands, the maker of Twinkies and Wonder Bread in the United States, said Friday that it plans to go out of business.

The company plans to close its American plants lay off approximately 18,500 people in the U.S. Wonder Bread is made by Weston in Canada. Montreal-based Saputo owns the Hostess brand in Canada but doesn’t produce Twinkies.

A national strike by members of the Bakery, Confection, Tobacco Workers and Grain Millers International Union that started last week has affected the company’s ability to produce and deliver products.

The company has filed for bankruptcy twice since 2004 — the latest filing happening last January. On Friday it said it had filed a bankruptcy motion in a New York court asking for permission to shut down operations and sell its assets.