GERON CORP — Director's Dealing 2010

May 21, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GERON CORP (GERN)
CIK: 0000886744
Period of Report: 2010-05-19

Reporting Person: BEHRS MELISSA KELLY (SVP Oncology)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-19	Common Stock	A	25000	—	Acquired	149001	Direct
2010-01-14	Common Stock	I	2652	$6.22	Acquired	2652	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-19	Employee Stock Option (right to buy)	$5.29	A	50000	Acquired	2020-05-19	Common Stock (50000)	Direct
2010-05-19	Employee Stock Option (right to buy)	$5.29	A	10000	Acquired	2020-05-19	Common Stock (10000)	Direct

Footnotes

F1: The shares of restricted stock will remain subject to a repurchase right of Geron over four years, during such time the repurchase right will lapse with respect to 25% of such shares on each anniversary date of May 28, 2010. The lapse of Geron's repurchase right is conditioned on the employee continuing to provide services to Geron through each vesting date.

F2: Shares issued under Geron 401(k) Plan.

F3: This option is exercisable in a series of 48 consecutive equal monthly installments commencing May 19, 2010, provided the optionee continues to provide services to the Company.

F4: This option is exercisable in a series of 24 consecutive equal monthly installments commencing June 2, 2010, provided the optionee continues to provide services to the Company.