Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Amkor Technology (AMKR) upgraded to Outperform from Neutral at Credit Suisse. 2. Owens Corning (OC) upgraded to Buy from Hold at Argus with analyst John Eade citing the company's recent Q3 earnings beat thanks to its implementation of strategies to expand margins and grow earnings under the new CEO Brian Chambers. 3. Texas Roadhouse (TXRH) upgraded to Outperform from Market Perform at Raymond James with analyst Brian Vaccaro saying he believes improved labor productivity reflected in the company's Q3 results and guidance should remove a key overhang in the stock and the company is also sustaining powerful comp outperformance with positive traffic in a slightly negative industry comp backdrop. 4. QTS Realty Trust (QTS) upgraded to Overweight from Neutral at JPMorgan with analyst Richard Choe saying he expects to see accelerating growth in the company's core colocation business driven by its service delivery platform "with upside coming from opportunistic hyperscale deals." 5. Ameren (AEE) upgraded to Buy from Neutral at UBS with analyst Daniel Ford saying after underperformance over the past nine months, the stock trades at a discount on a 2021 price-to-earnings ratio. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.