The acquisition combines Cornerstone's product and industry leadership with Clearlake's proven software investment experience and operational improvement approach, O.P.S.®, to strengthen and accelerate the company's next phase of growth and innovation.

"Clearlake's investment in Cornerstone is an exciting and important step for our company and our customers," said Phil Saunders, CEO, Cornerstone. "Clearlake has shown immense confidence in our talented team and the direction we are headed. With their financial sponsorship to invest behind growth, we will have an even greater opportunity to accelerate innovation and advance our customers' efforts to ensure their organizations - and people - are future ready."

"Cornerstone has done a tremendous job providing best-in-class software solutions to a large base of global customers," said Behdad Eghbali, Co-Founder and Managing Partner, and Prashant Mehrotra, Partner, of Clearlake. "We are thrilled to partner with the company's talented employees and believe that Cornerstone is well positioned to continue building on its strong leadership position for talent management SaaS solutions, both organically and through accelerated add-on acquisition activity."

"We are proud to partner with Clearlake and the Cornerstone management team in the next stage of the company's growth," said David Fishman, Managing Director and Head of Private Equity, and Andy Fishman, Managing Director at Vector Capital. "During our ownership of Saba Software, we developed tremendous respect for Cornerstone, and we believe the company's innovative products and people will extend Cornerstone's leadership position for years to come."