X0306 4 2018-05-21 0 0001385849 ENERGY FUELS INC UUUU 0001134878 HIGGS DENNIS LYLE C/O ENERGY FUELS INC. 225 UNION BLVD., SUITE 600 LAKEWOOD CO 80228 1 0 0 0 Common Shares 2018-05-21 4 S 0 2500 2.11 D 489919 D Common Shares 2018-05-21 4 S 0 2000 2.12 D 487919 D Common Shares 2018-05-21 4 S 0 5500 2.13 D 482419 D Common Shares 2018-05-22 4 S 0 10000 2.085 D 472419 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.04 to $2.14, inclusive. The reporting person undertakes to provide to Energy Fuels Inc., any security holder of Energy Fuels Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth above. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 13, 2017. /s/ Dennis Lyle Higgs 2018-05-22