Check out which companies are making headlines before the bell:

Walgreens Boots Alliance – The drug store operator and lab operator Theranos have reached a tentative settlement of their legal dispute, according to The Wall Street Journal. The proposed deal would see Theranos pay Walgreens less than $30 million, although it has not been finalized and the details could change. Walgreens had sought to recover the $140 million it had put into the partnership.