Wall Street Zen downgraded shares of I-Mab (NASDAQ:IMAB – Free Report) from a buy rating to a hold rating in a research note issued to investors on Sunday. Weiss Ratings restated a “sell (d+)” rating on shares of I-Mab in a report on Wednesday, October 8th. One investment analyst has rated the stock with a Strong Buy rating, five have issued a Buy rating and one has given a Sell rating to the stock. Stonepine Capital Management LLC purchased a new position in shares of I-Mab in the 1st quarter valued at about $398,000. Ground Swell Capital LLC purchased a new position in shares of I-Mab in the 1st quarter valued at about $53,000.