Who needs Time Warner Cable? Comcast stock is up 2.7% in pre-market trading after it said that it will add $2.5 billion to its stock repurchase plan — to $6.75 billion for 2015 — and reported strong Q1 results almost entirely across its broad board. Ratings improved at NBC, the film studio profited from Fifty Shades Of Grey, and Universal Theme Parks benefited from Orlando’s The Wizarding World of Harry Potter — Diagon Alley. The No.