Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Time Warner (TWX) upgraded to Outperform from Neutral at Credit Suisse with analyst Omar Sheikh citing attractive valuation. 2. Waste Management (WM) upgraded to Overweight from Equal Weight at Barclays with analyst Jon Windham saying the recent pullback in shares provides a buying opportunity given the company's "strong" underlying fundamentals. 3. Parker-Hannifin (PH) upgraded to Buy from Hold at Evercore ISI and to Overweight from Equal Weight at Morgan Stanley. 4. Biogen (BIIB) upgraded to Overweight from Neutral at Piper Jaffray with analyst Joshua Schimmer saying the company still has time to "get its act together to maximize the value of its SMA franchise, and stop being M&A disciplined/pipeline-undisciplined." 5. Cummins (CMI) upgraded to Buy from Hold at Evercore ISI with analyst David Raso citing lowered expectations, valuation, and accelerating inflation. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage,
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