Benzinga's Top Upgrades By: Benzinga via Benzinga May 04, 2015 at 09:01 AM EDT Analysts at Stifel Nicolaus upgraded Twitter Inc (NYSE: TWTR) from Sell to Hold and removed the price target of $36.00. Twitter ... Read More >> Related Stocks: Charles River Laboratories Intl Kennametal Inc Olympic Steel Inc Pinnacle West Capital Royal Gold Inc Twitter, Inc. United Dominion Realty Trust