U.S. stocks opened flat on Thursday, following two straight days of gains, as investors continued to make sense of last week's Brexit vote. The S&P 500 moved back into positive territory for 2016 on Wednesday. Plus, weekly jobless claims rose by 10,000 last week to 268,000, according to the Labor Department. The four-week average held steady at 266,750 claims. Meanwhile, LionsGate (LGF) agreed to acquire Starz (STRZA) for $4.4 billion in cash and stock. Billionaire media mogul John Malone holds stakes in both companies. Starz's class A shares rose almost 12 percent. LionsGate shares jumped eight percent. Shares of Constellation Brands (STZ - Get Report) climbed over two percent after reporting earnings of $1.54 a share, beating estimates of $1.52. Revenue of $1.87 billion was 15 percent higher than the same quarter a year ago and eclipsed forecasts of $1.83 billion. TheStreet's Scott Gamm reports from Wall Street.