Ersin Yumer, the San Diego-based company's executive vice president of operations, will serve as interim CEO until a permanent successor is named, according to the filing. Tencent / Naspers denies report it's selling its Tencent stake to Citic South African media giant Naspers Ltd. and its tech investment arm Prosus NV Tuesday rejected media reports that they are in talks to offload their 28% stake in Tencent Holdings to Chinese state-backed investors. Speculation about such a sale swirled after Asian Tech Press reported Monday that a group led by China's state-owned conglomerate Citic Group was in talks to buy all of Naspers' holdings in Tencent, the owner of WeChat. Naspers is Tencent's largest shareholder.