Activist investor Elliott Management Corp disclosed a stake of “more than 4%” in Cognizant Technology Solutions Corp. (NASD: CTSH) and urged the IT services provider to consider shaking up its board as one of several steps to boost shareholder value, Reuters reports. Shares of the company, which disclosed in September that it was investigating possible violations of US anti-corruption laws, rose 10.4% to $58.87 in early trading. Up to Friday’s close, the stock had fallen 11% this year.