Wall Street Zen cut shares of Alector (NASDAQ:ALEC – Free Report) from a hold rating to a sell rating in a research report sent to investors on Friday. BTIG Research restated a “buy” rating and issued a $5.00 price objective on shares of Alector in a report on Thursday. Insider Buying and SellingIn other news, Director Paula Hammond sold 14,000 shares of the company’s stock in a transaction on Tuesday, August 26th. Los Angeles Capital Management LLC boosted its stake in shares of Alector by 5.3% during the 2nd quarter. Institutional investors and hedge funds own 85.83% of the company’s stock.