Shares of Electronics for Imaging Inc. EFII, +0.72% soared 26% toward an 18-month high in premarket trade Monday, after the digital imaging company announced a deal to be acquired in a cash deal valued at $1.7 billion by private equity firm Siris Capital Group LLC. Under terms of the deal, Siris will pay $37 for each Electronics for Imaging shares outstanding, which is 26% above Friday’s closing price of $29.40. Electronics for Imaging said there will be a “go-shop” period over the next 45 calendar days. “We believe this transaction delivers superior and immediate value to our shareholders while providing us with a partner that can add strategic and operational expertise to our business,” said Electronics for Imaging Chief Executive Bill Muir. The stock has gained 4.8% over the past 12 months, while the Nasdaq Composite COMP, +0.46% has climbed 12.4% and the S&P 500 SPX, +0.66% has advanced 8.4%.

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