X0306 4 2019-05-28 0 0001419041 Tocagen Inc TOCA 0001236389 FOLETTA MARK G C/O TOCAGEN INC. 4242 CAMPUS POINT COURT, SUITE 500 SAN DIEGO CA 92121 0 1 0 0 EVP & Chief Financial Officer Common Stock 2019-05-28 4 P 0 5000 4.295 A 15042 D The weighted average purchase price for the transaction reported was $4.295, and the range of prices were between $4.2245 and $4.3509. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares purchased at each separate price will be provided. Includes 1,373 shares of Common Stock that were acquired by the Reporting Person on June 8, 2018 pursuant to the Issuer's Employee Stock Purchase Plan and 1,169 shares of Common Stock that were acquired by the Reporting Person on December 10, 2018 pursuant to the Issuer's Employee Stock Purchase Plan. /s/ Mark Foletta 2019-05-29