Software firm Apptio to be bought by Vista Equity Partners for $1.94 billion

(Reuters) - Software company Apptio Inc said on Sunday it had agreed to be bought by private equity firm Vista Equity Partners for about $1.94 billion (1.50 billion pounds)in cash.Apptio shareholders will receive $38 per share, a premium of about 53 percent to its last close. The deal that has been approved by the company's board, Apptio said.The agreement includes a 30-day "go-shop" period, which allows Apptio board and advisers to consider alternative offers, the company said.The deal is..