Vinva Investment Management Ltd boosted its stake in United Therapeutics Co. (NASDAQ:UTHR – Free Report) by 53.6% in the fourth quarter, HoldingsChannel reports. The firm owned 8,347 shares of the biotechnology company’s stock after acquiring an additional 2,914 shares during the period. Vinva Investment Management Ltd’s holdings in United Therapeutics were worth $1,830,000 as of […]