MOUNTAIN VIEW, Calif., Oct. 27, 2008 (GLOBE NEWSWIRE) -- Pharsight Corporation (Nasdaq:PHST) today announced that its stockholders have approved the previously announced acquisition of Pharsight by Tripos. The parties anticipate that the closing of the acquisition will occur on October 31, 2008. Upon closing, Pharsight will cease trading on the NASDAQ Capital Market, and stockholders will have the right to receive $5.50 in cash for each outstanding share of common stock. Based in St. Louis, Missouri, Tripos is wholly owned by Vector Capital, a San Francisco-based private equity firm specializing in buyouts, spinouts and recapitalizations of established technology businesses.