Shares of Apptio Inc. soared 52% to pace all premarket gainers Monday, after the business management systems company confirmed a deal to be acquired by an affiliate of private-equity firm Vista Equity Partners in a deal valued at $1.94 billion. The Wall Street Journal originally reported on Sunday that a deal was imminent. Under terms of the deal, which was announced late Sunday evening, Vista will pay $38 in cash for each Apptio share outstanding, which represents a 53% premium to Friday's closing price of $24.85. The deal, which includes a 30-day "go-shop" period, is expected to close in the first quarter of 2019. Apptio's stock has tumbled 30% over the past three months, while the S&P 500 /zigman2/quotes/210599714/realtime SPX -0.43% has slipped 1.8%.