X0306 4 2013-10-18 0 0001355790 International Stem Cell CORP ISCO:OB 0001447708 Semechkin Andrey C/O INTERNATIONAL STEM CELL CORP. 5950 PRIESTLY DRIVE CARLSBAD CA 92008 1 1 1 0 Chief Executive Officer Common Stock 2013-10-18 4 X 0 2754821 0.1452 A 21291620 D Common Stock 8000000 I By Corporation Series A Warrant (Right to Buy) 0.15 2013-10-18 4 X 0 2754821 0 A 2013-01-22 2018-01-22 Common Stock 2754821 8753820 D Series B Warrant (Right to Buy) 0.1452 2013-10-18 4 X 0 2754821 0 D 2013-07-24 2013-10-24 See Footnote 6488356 3244178 D Common Stock is owned by X-Master, Inc., a New Hampshire Corporation of which the reporting person is a director and sole shareholder. Exercise price is initially set at $0.15 per share, subject to adjustments in the event of certain transactions as defined in the warrant agreement. Exercise price is subject to further adjustments in the event of certain transactions as defined in the warrant agreement. Exercisable for Units. Each Unit consists of one share of common stock of the company and one Series A Warrant. Assuming full exercise of the Series A Warrants issued on the exercise of the Series B Warrants. Number of underlying securities issuable under the warrants is subject to a 4.999% beneficial ownership limitation except in the event of a fundamental transaction (as defined in the warrant agreement) the beneficial ownership limitation is set at 9.99%. /s/ Michael B. Tule, Attorney-in-Fact 2013-10-22