Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. SQM (SQM) upgraded to Buy from Hold at Santander. 2. Aegon (AEG) upgraded to Neutral from Underperform at BofA/Merrill with analyst Michael van Wegen citing recent shares weakness. 3. Lululemon (LULU) upgraded to Buy from Neutral at Citi with analyst Paul Lejuez saying fears of a macro slowdown have taken the winning retail brands down in recent months with the rest of the group, "seemingly painting all with the same brush." 4. Corcept Therapeutics (CORT) upgraded to Overweight from Neutral at Cantor Fitzgerald with analyst Charles Duncan saying the stock rallied 32% yesterday to $17.17 as a result of the United States Patent and Trademark Office granting a new utility patent for Korlym. 5. Realty Income (O) upgraded to Neutral from Sell at Citi. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.