Silicon Valley stalwart Wilson Sonsini Goodrich & Rosati is advising Tibco Software, the Palo Alto-based enterprise software company founded by Vivek Ranadive, on its proposed $4.3 billion sale to private equity firm Vista Equity Partners.

The deal, announced Monday, is the largest leveraged buyout in the technology industry so far this year, according to data compiled by Bloomberg. Tibco announced last month that Wilson Sonsini had been hired as outside counsel to an independent committee of its board of directors reviewing the company’s strategic alternatives.