Merus N.V. (NASDAQ:MRUS – Get Free Report) saw unusually large options trading on Thursday. Insider Activity at MerusInstitutional Trading of MerusIn related news, COO Peter B. Silverman sold 25,000 shares of Merus stock in a transaction dated Thursday, July 17th. BMO Capital Markets downgraded Merus from an “outperform” rating to a “hold” rating in a research report on Tuesday. Finally, Wall Street Zen lowered Merus from a “hold” rating to a “sell” rating in a report on Sunday, July 20th. Four analysts have rated the stock with a Buy rating and twelve have issued a Hold rating to the company.