Checkpoint Systems, Inc. (NYSE: CKP) shares gained 27.03 percent to $10.01 in pre-market trading after the company agreed to be acquired by CCL Industries for $10.15 per share in cash. Everyday Health Inc (NYSE: EVDY) shares rose 24.89 percent to $5.82 in pre-market trading on stronger-than-expected Q4 results. Abercrombie & Fitch Co. (NYSE: ANF) shares rose 6.68 percent to $31.30 in pre-market trading after the company reported upbeat Q4 results. CSX Corporation (NYSE: CSX) rose 4.95 percent to $25.86 in pre-market trading after the Wall Street Journal reported on Tuesday the company has been approached by Canadian Pacific Railway Limited (NYSE: CP). Zynga Inc (NASDAQ: ZNGA) shares rose 4.17 percent to $2.25 in pre-market trading after the company appointed a new CEO. Zynga announced after Tuesday's market close that Frank Gibeau will replace Mark Pincus as CEO, effective March 7. Pincus is credited as being Zynga's founder and will serve as Executive Chairman of the Board. PTC Therapeutics, Inc. (NASDAQ: PTCT) shares rose 3.60 percent to $5.75 in the pre-market trading session after tumbling 30.45 percent on Tuesday. Ross Stores, Inc. (NASDAQ: ROST) shares rose 1.73 percent to $57.20 in pre-market trading. Ross Stores reported better-than-expected results for its fourth quarter, but the company issued a weak earnings forecast. The company also lifted its quarterly dividend by 15 percent.