
As part of the arrangement, Interwoven stockholders will receive approximately US$16.20 a share.
The deal was reportedly financed with cash, a £220m underwritten placing and a loan from Barclays.
Following completion of the deal in the second quarter of 2009, Autonomy will have a cash balance of around US$75 million.
The company expects to generate annual costs synergies of approximately US$40 million during the 12 months following the deal completion from the elimination of duplicate costs.
The consolidated group will have a client base of 20,000 businesses across the globe.