Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Tableau (DATA) upgraded to Neutral from Underweight at MUFG with analyst Stephen Bersey saying the company made "material progress" in its subscription transition during the first quarter, which depressed revenue and earnings in the quarter. 2. XO Group (XOXO) upgraded to Buy from Neutral at B. Riley FBR with analyst Sameet Sinha saying the company's "solid" Q1 results indicate an acceleration in revenue growth. 3. Square (SQ) upgraded to Buy from Hold at Stifel with analyst Scott Devitt saying he views last night's Q1 results as "impressive," highlighting the 31% gross payment volume growth versus last year. 4. Yum! Brands (YUM) upgraded to Outperform from Neutral at Baird. 5. 3M (MMM) upgraded to Outperform from Sector Perform at RBC Capital with analyst Deane Dray saying the 4-month decline in the stock price has taken its valuation to its historical relative PE support level. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

Citi lowered the firm's price target on Yum! Brands to $162 from $166 and keeps a Buy rating on the shares ahead of the Q1 report. The analyst expects Yum continues to voice confidence in 5% unit growth, and its digital initiatives are growing sales for franchisees. The firm views the company's near-term outlook as "shakier" than the long-term.