Uranium Energy Corp. (NYSE: UEC)Best Energy Penny Stocks To Watch #1: Denison Mines Corp. Denison has been one of the more popular penny stocks to watch in the uranium space. Though shares pulled back on Tuesday, a look at the last few months paints a different picture. In fact, since election day (Nov. 6), shares of DNN stock are up over 240% to-date. The massive rally that nuclear energy stocks have seen helped lift most names in 2021, Denison included. The company recently announced its inclusion in the S&P/TSX Composite Index this wee. This broadens the market exposure of the company and further builds upon the companyâs strategy to build lasting value. CEO David Cates said that the company is âwell positioned to support the clean-energy transition through the future development of our flagship Wheeler River uranium project in the Athabasca Basin region of northern Saskatchewan.â