Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  GRETHLEIN ANDREW J
 2. Date of Event Requiring Statement (Month/Day/Year)
09/19/2012		 3. Issuer Name and Ticker or Trading Symbol
GERON CORP [GERN]
(Last)
(First)
(Middle)
C/O GERON CORPORATION, 149 COMMONWEALTH DRIVE, SUITE 2070		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP, Technical Operations
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

MENLO PARK, CA 94025		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy)   (1) 09/19/2022 Common Stock 600,000 $ 1.7 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
GRETHLEIN ANDREW J
C/O GERON CORPORATION
149 COMMONWEALTH DRIVE, SUITE 2070
MENLO PARK, CA 94025		       EVP, Technical Operations  

Signatures

/s/ Andrew Grethlein 09/21/2012
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) This option is immediately exercisable and vests as follows: 75,000 shares on March 17, 2013, the remaining 525,000 shares in a series of 42 equal monthly installments commencing March 17, 2013, provided the optionee continues to provide services to the Company.

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