Why Shares of Darling Ingredients Jumped 13.2% in May

Shares of Darling Ingredients (NYSE: DAR) rose 13.2% in May, according to data provided by S&P Global Market Intelligence. That handily outpaced the S&P 500 index's 4.5% gain for the month, but the organic ingredients manufacturer's shares are still down about 8% year to date.

Darling Ingredients takes used animal products like restaurant grease and used frying oil, bakery scraps, and other... ahem...more unsavory bits and pieces, and refines them into usable ingredients for use in feed, soap, and even biodiesel, through a joint venture with Valero called Diamond Green Diesel.

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Source Fool.com