North Asia-focused private equity firm MBK Partners has reportedly purchased a 31 percent stake in Woongjin Coway, the water purification business of South Korean conglomerate Woongjin Holdings, for KRW1.2 trillion (approximately US$1.1 billion). The acquisition took place through a PIPE transaction in which MBK paid KRW50,000 (approximately US$44.14) per share, a 33 percent premium to its most recent closing share price.