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Optional Dividend: Geron Corporation CUSIP: 374163103
Record Date: 05/28/2014 Payable Date: 08/15/2014 Rate: (Stock) 1 share of Asterias Biotherapeutics for approximately every 24 shares of Geron Corporation held (Cash) TBD DTC EDS Cut-Off: 07/31/2014 at 8:00 P.M. New York time

Optional Dividend: Geron Corporation CUSIP: 374163103 Record Date: 05/28/2014 Payable Date: 08/15/2014 Rate: (Stock) 1 share of Asterias Biotherapeutics for approximately every 24 shares of Geron Corporation held (Cash) TBD DTC EDS Cut-Off: 07/31/2014 at 8:00 P.M. New York time

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