X0508 4 2025-02-18 0000886744 GERON CORP GERN 0001270921 GRETHLEIN ANDREW J C/O GERON CORPORATION 919 E. HILLSDALE BLVD, SUITE 250 FOSTER CITY CA 94404 false true false false EVP, Chief Operating Officer false Stock Option (right to buy) 2.63 2025-02-18 4 A false 839000 0 A 2035-02-17 Common Stock 839000 839000 D Restricted Stock Units 2025-02-18 4 A false 140000 0 A Common Stock 140000 140000 D This option was granted on February 18, 2025 and vests in 48 consecutive equal monthly installments from the date of grant, provided the Reporting Person continues to provide services to the Issuer through the applicable vesting date. Each restricted stock unit ("RSU") represents the contingent right to receive one share of the Issuer's common stock. The RSUs were granted on February 18, 2025 and vest in four consecutive equal annual installments from the date of grant, provided the Reporting Person continues to provide services to the Issuer through the applicable vesting date. /s/ Scott A. Samuels, attorney-in-fact for Andrew J. Grethlein 2025-02-20