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Shoppers walk through the King of Prussia mall in King of Prussia, Pennsylvania.

Check out the companies making headlines in midday trading. 

Sunrun -- The solar stock popped 10% after Simmons Energy, a division of Piper Sandler, upgraded the stock to overweight from neutral. The firm said in a note to client that the recent pullback in solar stocks was puzzling and that shares of Sunrun could jump more than 60%.

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