Investment analysts have revised their price targets upwards for six major stocks this week, with one company expected to see an 82% surge. The revised targets include four U.S.-listed companies, with the most significant upgrade forecasted for a biopharmaceutical firm. What Happened: CNBC Pro conducted a screening for global stocks that have garnered price target upgrades from five or more analysts in the past seven days and exhibit a potential upside of over 25%, the report published on Friday. The upgraded stocks include Shift4 Payments Inc (NYSE:FOUR), Semtech Corp (NASDAQ:SMTC), Formula O…