Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Verizon (VZ) upgraded to Outperform from Perform at Oppenheimer with analyst Timothy Horan saying he believes both Verizon and AT&T (T) will benefit from elevated T-Mobile (TMUS)/Sprint (S) churn from the new company. 2. WW (WW) upgraded to Buy from Hold at Craig-Hallum with analyst Alex Fuhrman saying he sees "improving trends" for the company with the positive reception of its Kurbo By WW launch and the upside potential of its new upcoming diet program launch. 3. Cree (CREE) upgraded to Neutral from Underweight at JPMorgan with analyst Paul Coster citing valuation. 4. MongoDB (MDB) upgraded to Buy from Neutral at Citi with analyst Tyler Radke saying the shares have lagged high-growth peers the last six months on concerns around sustainability of growth. 5. Exelon (EXC) upgraded to Overweight from Equal Weight at Morgan Stanley with analyst Stephen Byrd saying after backing out the utility, Exelon's shares price in no value for its 32 GW unregulated merchant fleet, which generates "strong" free cash flow. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.