This article originally appeared as part of ongoing coverage in our premium Motley Fool Stock Advisor service... we hope you enjoy this complimentary peek!

What's happening
Shares of Tibco Software (UNKNOWN:TIBX.DL) are trading roughly 21% higher this morning after it agreed to accept a buyout offer  from private equity firm Vista Equity Partners.

Why it's happening
Vista's $4.3 billion offer -- which includes the assumption of Tibco's debt as well as a $3.98 billion buyout of outstanding shares -- values Tibco's shares at $24 apiece, which is roughly 2% higher than the current price of $23.60 around which shares are currently trading. The deal caps off what was a rather frenetic review of Tibco's options following activist push on Aug. 12th from Praesidium Investment Management, Tibco's sixth-largest shareholder, in search of just such a sale. The deal is expected to close in the fourth quarter.