Top 5 Pre-Market Gainers Today: Moving On M&A By: Benzinga via Benzinga May 23, 2016 at 09:13 AM EDT XenoPort, Inc. (NASDAQ: XNPT) is up 57.73 percent after material agreement to be acquired by Arbor Pharma was filed for $7.03 per ... Read More >> Related Stocks: Globalscape Monsanto Co