BEA Systems

(BEAS)

, which has been under pressure to improve its license revenue performance, has purchased

Plumtree Software

(PLUM)

for $200 million, or $5.50 a share. The offer represents a 13% premium over Plumtree's closing price of $4.86 a share on Monday.

Plumtree's stock jumped after the announcement; in recent trading, shares were up 49 cents, or 10%, to $5.35. Shares of BEA were up 11 cents to $9.

The all-cash transaction is expected to close in the fall.

Plumtree sells "inward-facing" portal software designed to allow employees of an enterprise to work collaboratively via the Web. BEA also sells portals (and other software), but its portal product is "outward-facing" and is designed to allow customers to take advantage of online banking sites and other Web-based business functions.

BEA has about 1,500 customers, Plumtree has about 700, and the two companies share just 350 of them, said Kevin Faulkner, BEA's vice president of investor relations.

After the transaction closes, Plumtree, which has about 400 workers, will become part of a new BEA product unit. BEA Chief Technology Officer and Executive Vice President Mark Carges, and Plumtree Software Chief Executive Officer, John Kunze, will lead the transition.