X0306 4 2017-05-31 0 0001355790 International Stem Cell CORP ISCO.OB 0001405212 Don Wright C/O INTERNATIONAL STEM CELL CORP. 5950 PRIESTLY DRIVE CARLSBAD CA 92008 1 0 0 0 Stock Option (Right to Buy) 1.10 2017-05-31 4 A 0 30000 0 A 2027-05-31 Common Stock 30000 30000 D Stock option granted as part of compensation for non-employee directors. Options vest fully on the earlier of (i) May 31, 2018 or (ii) the date of the 2018 Annual Meeting of Stockholders, with vesting accelerated for all shares in the event of a change in control. All grants have an exercise price of $1.10 per share. /s/ Mahnaz Ebrahimi, Attorney-in-Fact 2017-06-02