Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. HP Enterprise (HPE) upgraded to Neutral from Underweight at JPMorgan with analyst Paul Coster citing valuation. 2. Southwest (LUV) upgraded to Buy from Neutral at UBS with analyst Myles Walton saying the path for a domestic travel recovery is clearer. 3. LyondellBasell (LYB) upgraded to Buy from Hold at Deutsche Bank with analyst David Begleiter saying he sees potential upside of 20% in the shares as the outlook for the U.S. polyethylene market has "improved significantly" over the past month. 4. Regeneron (REGN) upgraded to Overweight from Equal Weight at Wells Fargo with analyst Jim Birchenough citing a review of recent progress and on an improved outlook for key products EYLEA, DUPIXENT and LIBTAYO plus earlier pipeline progress. 5. iRobot (IRBT) upgraded to Neutral from Underweight at JPMorgan with analyst Mark Strouse saying he sees "several mild positive developments" recently, including iRobot's technology licensing deal with Ecovacs, that he believes could help fill some holes in the product lineup in certain geographies. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.