X0306 4 2019-02-07 0 0001708493 Harpoon Therapeutics, Inc. HARP 0001362054 Baeuerle Patrick C/O HARPOON THERAPEUTICS, INC. 4000 SHORELINE COURT, SUITE 250 SOUTH SAN FRANCISCO CA 94080 1 0 0 0 Director Stock Option (Right to Buy) 14.00 2019-02-07 4 A 0 3829 0.00 A 2029-02-06 Common Stock 3829 3829 D The stock option vests and becomes exercisable as to 25% of the shares subject to the option on the last day of each calendar quarter following the grant date of February 7, 2019 (on March 31, 2019, June 30, 2019, September 30, 2019, and December 31, 2019), subject to the continuous service of the Reporting Person on each vesting date. /s/ Patrick Baeuerle by Christopher Whitmore, Attorney-in-Fact 2019-03-29