In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

Denise Morrison, the CEO of Campbell Soup since 2011, abruptly announced her retirement Friday, effective immediately. 
  
 Morrison's departure leaves only 23 women as CEOs of Fortune 500 companies. 
  
 Keith McLoughlin, the former head of appliance maker Electrolux AB (ELUXF) and a board member at Campbell Soup, was named interim CEO. The company did not say why Morrison is leaving. Neither took questions from analysts on a conference call to discuss the company's latest financial results. 
  
 In the past year, a number of other high-profile women have stepped down as business leaders, including Meg Whitman of Hewlett Packard Enterprise, Irene Rosenfeld of Mondelez (MDLZ) and Sheri McCoy of Avon (AVP). 
  
 And just last month, Margo Georgiadis, who became CEO of Mattel (MAT) in 2017, said she was leaving the struggling toymaker to become the CEO of the genealogy company Ancestry. 
  
 Among the women still leading large American companies are Mary Barra at GM (GM), Marillyn Hewson at Lockheed Martin (LMT), Ginni Rometty at IBM (IBM) and Indra Nooyi at Pepsi (PEP). 
  
 Morrison's sister, Maggie Wilderotter, used to be a CEO as well. She ran the telecom company Frontier Communications (FTR) from 2004 to 2015, when she retired. 
  
 Related: The ranks of women CEOs got even smaller in 2017 
  
 Shares of Campbell Soup (CPB) fell more than 10% Friday on the news of Morrison's retirement. 
  
 Campbell Soup recently completed the acquisition of snack maker Snyder's Lance for more than $6 billion, and it reported earnings Friday that topped forecasts. But it lowered its outlook for the year. 
  
 Brittany Weissman, an analyst with Edward Jones, said in a report that Morrison's departure was a surprise. But she added Morrison was under pressure to turn Campbell's soup business around, and that her retirement "likely reflects ongoing execution issues." 
  
 Campbell Soup isn't the only supermarket staple that is hurting. 
  
 Many food companies, including cereal makers General Mills (GIS) and Kellogg (K), Mondelez and Warren Buffett-backed Kraft Heinz, have been struggling in 2018. Campbell Soup's stock is down nearly 30% this year. 
  
 Higher commodity costs are hurting profits. So is a focus on lower prices by Amazon (AMZN), Walmart (WMT), Kroger (KR) and other big retailers in the grocery business. ||||| Campbell Soup Co. chief Denise Morrison stepped down on Friday and the company said it might sell some brands, after a bet on fresher foods under her leadership failed to revive sales. 
  
 Campbell’s U.S. soup sales—its core business—fell in all but one year of Ms. Morrison’s seven-year tenure. Efforts to enter the faster-growing fresh-food business, through the acquisition of Bolthouse Farms juice for instance, hit their own hurdles. 
  
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A series of high-level departures over the last year thinned the ranks of women leading Fortune 500 companies. On Friday, another departure was added to the list: Denise Morrison announced she is stepping down as CEO of Campbell Soup. That leaves 23 women in charge of Fortune 500 companies, or just 4.6% of the total, reports the New York Times. Others who have stepped down over the past year include Marissa Mayer of Yahoo, Meg Whitman of Hewlett-Packard, Irene Rosenfeld of Mondelez, and Sheri McCoy of Avon, reports CNN Money. So why is the 64-year-old Morrison out? The Wall Street Journal reports that a "bet on fresher foods during her seven-year tenure failed to revive sales." What's more, sales of US soup, a key metric for the company, rose in only one year under her watch. Board member Keith McLoughlin will replace Morrison on an interim basis, and he said in a conference call that the company will take a new look "with urgency" at its product portfolio, suggesting some brands might be sold. Pepperidge Farm, V8, and Bolthouse Farms are among those currently under the company's umbrella.