Zacks Research upgraded shares of Montauk Renewables (NASDAQ:MNTK – Free Report) from a hold rating to a strong-buy rating in a research note released on Tuesday,Zacks.com reports. Tudor Pickering raised shares of Montauk Renewables from a “strong sell” rating to a “hold” rating in a report on Friday, November 7th. Finally, Wall Street Zen raised Montauk Renewables from a “sell” rating to a “hold” rating in a report on Saturday, January 17th. Get Montauk Renewables alerts:Check Out Our Latest Stock Analysis on MNTKMontauk Renewables Stock PerformanceShares of MNTK stock traded down $0.16 during trading on Tuesday, reaching $1.49. Featured ArticlesReceive News & Ratings for Montauk Renewables Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Montauk Renewables and related companies with MarketBeat.com's FREE daily email newsletter.