 Invesco Ltd. lessened its stake in Principia Biopharma Inc NASDAQ:PRNB by 40.0 during the 1st quarter, Holdings Channel.com reports. The firm owned 12,605 shares of the companys stock after selling 8,388 shares during the quarter. Invesco Ltd.s holdings in Principia Biopharma were worth 749,000 as of its most recent SEC filing. Several other hedge funds ... 