Ralph Whitworth’s Relational Investors has officially closed down its activist hedge fund as of December. It no longer owns any stocks. The firm was open for two decades and managed over $6 billion. Relational started shutting down in 2014 when founder Ralph Whitworth announced he was taking a leave of absence to address his throat cancer. While Relational is gone, it won’t be forgotten – known for waging battles at Hewlett-Packard and Home Depot. Ralph Whitworth’s Relational Investors LLC closed out its portfolio in December, marking the end of a firm that was a pioneer in activist investing and once...