Zoom is taking advantage of the impressive rise in its stock price in the past year to make its first major acquisition. The popular video conferencing firm, which was valued at about $9 billion at its IPO two years ago, said Sunday evening it has agreed a deal to buy cloud call centre service provider Five9 for about $14.7 billion in an all-stock transaction. 20-year-old Five9 will become an operating unit of Zoom after the deal, which is expected to close in the first half of 2022, the two firms said. The proposed acquisition is Zoom’s latest attempt to expand its offerings. In the past year, the video conferencing software has added several office collaboration products, a cloud phone system, and an all-in-one home communications appliance. The acquisition of Five9 — which has amassed over 2,000 customers worldwide including Citrix and Under Armour and processes over 7 billion minutes of calls annually — will help Zoom enter the “$24 billion” market for contact centers, the comp