HP Ignored Autonomy Accounting Warnings, Shareholders Say

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Hewlett-Packard Co. ignored warnings about accounting irregularities at Autonomy Corp. and failed to properly vet its finances before acquiring the British software maker, shareholders said in a lawsuit.

Hewlett-Packard board members performed “no technical due diligence” and the company’s executives and advisers “misrepresented facts to conceal their own failings,” Joseph Cotchett, an attorney for investors, said in a complaint filed yesterday in federal court in San Francisco.