Genstar Capital, a leading private equity firm focused on investments in targeted segments of the industrial technology, healthcare, financial services and software industries, today announced the sale of Pretium Packaging, a leading North American manufacturer of rigid plastic containers and closures, to Clearlake Capital Group, L.P. Pretium is a leading provider of custom, high performance rigid plastic bottles and containers, serving a diverse base of customers in the food and specialty beverage, healthcare, sports nutrition,...