X0306 4 2020-03-03 0 0001368265 Clean Energy Fuels Corp. CLNE 0001400209 Littlefair Andrew J C/O CLEAN ENERGY FUELS CORP. 4675 MACARTHUR COURT, SUITE 800 NEWPORT BEACH CA 92660 1 1 0 0 CEO and President Common Stock 2020-03-03 4 S 0 25375 2.2216 D 1603974 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 13, 2019. Shares were sold by the Reporting Person to generate proceeds used to satisfy the tax withholding obligation that arose upon the vesting of restricted stock units granted to the Reporting Person. Shares were sold in multiple transactions at prices ranging from $2.22 to $2.23, inclusive. The price reported in Column 4 is a weighted average sale price. The Reporting Person undertakes to provide the Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote. /s/ J. Nathan Jensen, Attorney-in-Fact, for Andrew Littlefair 2020-03-03