Another big merger in the software sector appears to be in the works.

Symantec ( SYMC) is reportedly close to acquiring Veritas Software ( VRTS) for about $13 billion.

The two Silicon Valley-based companies have been discussing a deal for more than a month, and an official announcement is possible as early as this week, The New York Times reported Tuesday.

Symantec, widely known for its Norton antivirus products, would be paying $29.70 a share for Veritas. Based on Veritas' closing share price Monday, the offer represents an 18% premium. Veritas shares rose $3.68, or 14.6%, to $28.87 in premarket trading.

Symantec shares closed at $32.86 Monday.

On Monday, Oracle ( ORCL) announced a definitive agreement to acquire PeopleSoft ( PSFT) for $10.3 billion, ending the software industry's most bitter takeover saga.