Alder BioPharmaceuticals, Inc.’s ALDR shares soared 83.9% after Danish company Lundbeck announced plans to acquire the company in a deal worth $2 billionShares of General Motors Company GM fell 4.3% after the United Auto Workers went on strike onSep 15; this is the first nationwide strike at General Motors in the last 12 yearsShares of New Relic, Inc. NEWR dropped 0.4% as the software company mentioned a cut in revenue guidanceSemGroup Corporation’s SEMG shares rose 60.5% after Energy Transfer LP (ET) announced that it will buy SemGroup for $5 billionWant the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report New Relic, Inc. (NEWR): Free Stock Analysis Report General Motors Company (GM): Free Stock Analysis Report Alder BioPharmaceuticals, Inc. (ALDR): Free Stock Analysis Report SemGroup Corporation (SEMG): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research