Ambac Financial Group Inc. failed to provide fourth-quarter earnings or its year-end 10-K filing to the Securities and Exchange Commission on Tuesday. It attributed the delay to ongoing discussions with financial institution counterparties regarding the obligations of the company and its subsidiaries.

"The Company anticipates that the outcome of these discussions could have a material impact on the disclosure and financial statements included in its Form 10-K," Ambac said in a filing to the regulator.

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