SAN FRANCISCO, CALIFORNIA--(Marketwired - Sept. 9, 2016) - BVF Partners L.P. ("Partners") announced that on September 8, 2016, certain affiliates of Partners acquired Common Shares (the "Common Shares") of Xenon Pharmaceuticals Inc. ("Xenon"), a Burnaby, British Columbia-based company, in a public offering (collectively, the "Transactions").