Exclusive: Some Ambac shareholders call on CEO to quit, cite delays in paying claims - sources

NEW YORK (Reuters) - Three of Ambac Financial Group Inc's top ten shareholders are calling on its new CEO Nader Tavakoli to step down, according to people familiar with the matter. One of the reasons they give is that he is slow to settle $4 billion in insurance claims in which at least two of them have an interest, the sources said.