Check out the companies making headlines in midday trading: Micron Technology — Micron edged 2.7% higher after JPMorgan reiterated the stock as overweight ahead of the memory chipmaker's earnings, which are expected Wednesday after market close. Monday's gain put the stock on track for its biggest advance since Aug. 28, when it popped 9%. Ulta — The cosmetics stock lost more than 3% after a downgrade to hold from buy at TD Cowen. Biohaven — Shares surged 12% after the clinical-stage pharma company announced positive trial data for its drug treating spinocerebellar ataxia known as troriluzole. Intel — Shares of the struggling chipmaker climbed 2.4% after Bloomberg News reported on Sunday that Apollo Global Management proposed to make a multibillion-dollar investment in Intel.

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Persons: Harlan Sur, General Motors, Bernstein, Cowen, troriluzole, Ciena, Jesse Pound, Alex Harring, Samantha Subin, Sean Conlon Organizations: Micron Technology, Micron, JPMorgan, Tesla, Barclays, U.S . Army, General, pharma, Intel —, Bloomberg, Apollo Global Management, Intel, CNBC, Qualcomm, Citi