Clean Energy Fuels Corp. (NASDAQ:CLNE) is one of the 7 best oil and gas penny stocks to buy according to analysts, supported by hedge fund interest and significant upside potential. Clean Energy Fuels Corp. (CLNE) to Construct Second Hydrogen Fueling Station for Foothill Transportation In keeping with its commitment to zero-emission transportation infrastructure, Clean Energy Fuels Corp. (NASDAQ:CLNE), one of the best oil and gas penny stocks, announced on September 25, 2025, that it will construct a sec ...