February 21, 2012 San Francisco-based private equity firm Vista Equity Partners has made a nonbonding proposal to acquire London-based financial software vendor Misys. The proposal disrupts merger talks announced earlier this month between Geneva-based banking software provider Temenos and Misys.

Vista is proposing to acquire outstanding shares of Misys for cash but has not yet made a firm offer, which the company must do by March 19. The companies have indicated that they'll make further announcements once the Misys board of directors has had a chance to review the offer and make a recommendation.