Fresh off its $4.5 billion deal for Calsonic Kansei, a automobile component affiliate of Nissan Motor, private equity firm KKR & Co. L.P. (<a href="http://www.investopedia.com/markets/stocks/kkr/">KKR</a>) is back shopping for more deals. The firm will take a majority stake in Optiv Security, a provider of end-to-end cyber security solutions. Optiv is being acquired from a group of private investors, including a private equity fund managed by Blackstone Mortgage Trust, Inc. (<a href="http://www.investopedia.com/markets/stocks/bxmt/">BXMT</a>), which will maintain a <a href="http://www.investopedia.com/terms/m/minorityinterest.asp">minority interest</a> in Optiv along with Optiv management, the press release read.