image caption Software group purchased by HP Autonomy in 2011
Hewlett-Packard's contentious takeover of UK-based Autonomy is under investigation by the US Department of Justice (DOJ).
In a folder regulatory , HP said the DOJ announced last month that it had opened an investigation into the Autonomy deal.
HP purchased an Autonomy group software in 2011 but has said this year the British firm is outraged for "inflating " its value, leading to a $ 5 billion (£ 3 billion) write-off.
HP also said it was cooperating with the UK's Serious Fraud Office.
In November, HP said it was canceling $ 8.8 billion on the $ 11.1 billion he paid for Autonomy, of which $ 5 billion was "related to serious accounting irregularities, misrepresentation and
HP had asked US and UK authorities to investigate the alleged misrepresentation of Autonomy's finances before HP took over the company last year.
On Thursday he said: "As a result of the findings of an ongoing investigation, HP has provided information to the UK Serious Fraud Office, the US Department of Justice and the SEC regarding the accounting irregularities,
"On November 21, 2012, representedChildren from the US Department of Justice informed HP that they had opened an investigation into Autonomy. HP is cooperating with the three investigative agencies. "
An HP spokesperson told Hfrance.fr that he had no comments to add beyond this which he filed with regulators.
Former Autonomy director Mike Lynch, who is also a non-executive director of Hfrance.fr, has rejected HP's claims that the old management of Autonomy misled them about the value of the company.
He said he was "shocked and dismayed " by the allegations.
Accountants Deloitte and KPMG are also being sued for their alleged role in Hewlett-Packard's purchase of Autonomy. Both companies have denied responsibility for assessing autonomy at the 'time. articlebody >