Oct 27 (Reuters) - Chipmaker GlobalFoundries Inc on Wednesday sold shares in its initial public offering at $47 a piece, at the higher end of its targeted price range, to raise about $2.6 billion, people familiar with the matter said. The IPO gives GlobalFoundries a valuation of about $26 billion, making it one of the biggest stock market floatations of the year in the United States. Abu Dhabi’s sovereign wealth fund Mubadala Investment Co, which holds a majority stake in GlobalFoundries, sold 22 million shares in the IPO. Funds associated with BlackRock Inc, Fidelity Management & Research Company LLC, some affiliates of Koch Strategic Platforms LLC, Columbia Management Investment Advisers LLC and Qualcomm Inc invested over $1 billion in the IPO. A spokesperson for GlobalFoundries said the company is waiting to finalize the details and declined to comment on the IPO price. (Additional reporting by Niket Nishant in Bengaluru; Editing by Chris Reese)