Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Target (TGT) upgraded to Outperform from Market Perform at Cowen with analyst Oliver Chen saying he believes its combination of strong price value, convenient digitally-enabled pick up options, private brand innovation, and traffic will drive the stock higher. 2. Spark Therapeutics (ONCE) upgraded to Strong Buy from Outperform at Raymond James, to Buy from Neutral at B. Riley FBR, and to Neutral from Underperform at Wedbush. 3. USA Compression (USAC) upgraded to Outperform from Sector Perform at RBC Capital with analyst TJ Schultz saying the company's strong market fundamentals and synergies from its CDM compression acquisition should allow it to de-lever and grow coverage. 4. Noble Energy (NBL) upgraded to Outperform from Market Perform at Raymond James and to Buy from Hold at Tudor Pickering. 5. QEP Resources (QEP) upgraded to Buy from Hold at Tudor Pickering. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.