Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. First Solar (FSLR) upgraded to Outperform from Market Perform at Raymond James with analyst Pavel Molchanov saying this is the first time since 2010 that he is turning positive on First Solar, saying the backdrop is the best all-around investor sentiment on clean tech in more than a decade. 2. TC Energy (TRP) upgraded to Neutral from Sell at Goldman Sachs with analyst Michael Lapides citing lower balance sheet concerns due to asset sales, a high proportion of EBITDA from its low risk, but solid growth gas pipeline business in Western Canada, and to reflect more accurately historical trading trends. 3. Keurig Dr Pepper (KDP) upgraded to Equal Weight from Underweight at Morgan Stanley with analyst Dara Mohsenian saying the stock is up only 5% over the last year, which lags its closest peers Coca-Cola (KO) and Pepsi (PEP) as well as the broader Consumer Packaged Goods peer group and the S&P, noted Mohsenian, who now thinks Keurig's valuation better reflects its lower growth profile and higher risks compared to is peers. 4. Builders FirstSource (BLDR) upgraded to Outperform from Sector Perform at RBC Capital and to Buy from Hold at Benchmark. 5. Teck Resources (TECK) upgraded to Neutral from Underperform at BofA with analyst Timna Tanners saying Friday's 15% selloff has brought the shares to levels not seen since April 2016. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.