(Telecompaper) Enterprise security specialist Blue Coat Systems is being acquired by the private equity group Bain Capital. It will pay USD 2.4 billion to acquire the company from investor Thoma Bravo, which bought Blue Coat at the end of 2011 for USD 1.3 billion. During the past three years, Blue Coat has experienced strong market share and revenue growth in its major product lines and now counts 80 percent of the Fortune 500 as customers. The company has also made several acquisitions, extending its portfolio to advanced threat defense, security analytics and encrypted traffic management. Blue Coat said the new investor should help the company further accelerate its growth. The takeover is expected to close during the first half of 2015.