Clearlake Capital Group LP said Monday it would buy private cybersecurity company Quest Software from Francisco Partners. A source familiar with the transaction told MarketWatch the value of the transaction is about $5.4 billion. Quest CEO Patrick Nichols will remain in his current position, along with the existing executive management team. Goldman Sachs, Morgan Stanley, BoA Securities, Barclays, Credit Suisse, BMO Capital Markets and Citigroup are issuing debt financing for the deal. The transaction comes about five years after Francisco Partners carved out the Quest business from Dell Technologies Inc. /zigman2/quotes/203822527/composite DELL -3.19% for $2.4 billion.