Abivax SA is positioning to change the treatment landscape in ulcerative colitis after delivering positive results and a favorable safety profile in two phase III trials of its orally available miRNA-124 enhancer, obefazimod. Abivax stock rocketed in Europe and the U.S. on news of the data. Shares (Paris:ABVX) rose €45.40, or 510%, to close at €54.30 July 23. In the U.S., shares (NASDAQ:ABVX) leapt 586%, or $58.60, to close at $68.60.