UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                ----------------

                                 SCHEDULE 13G/A
                                (Amendment No. 4)
                  Under the Securities Exchange Act of 1934

                                GERON CORPORATION
              ----------------------------------------------------
                                (Name of Issuer)


                          COMMON STOCK, $.001 PAR VALUE
              ----------------------------------------------------
                         (Title of Class of Securities)

                                    374163103
              ----------------------------------------------------
                                 (CUSIP Number)

                                Gerald F. Stahlecker
                     c/o Rose Glen Capital Management, L.P.
                          3 Bala Plaza East, Suite 501
                               251 St. Asaphs Road
                              Bala Cynwyd, PA 19004



                                DECEMBER 31, 2002
              -----------------------------------------------------
              Date of Event Which Requires Filing of this Statement


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

|_|  Rule 13d-1(b)
|X|  Rule 13d-1(c)
|_|  Rule 13d-1(d)






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CUSIP NO. 3741633103                                          PAGE 2 OF 8 PAGES
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------------------------------------------------------------------------------
                  NAME OF REPORTING PERSON/
1                 I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

                  RGC International Investors, LDC
-------------------------------------------------------------------------------
                  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP       (a)|_|
2                                                                        (b)|_|
-------------------------------------------------------------------------------
                  SEC USE ONLY
3
-------------------------------------------------------------------------------
                  CITIZENSHIP OR PLACE OF ORGANIZATION
4
                  Cayman Islands
-------------------------------------------------------------------------------
                                      5        SOLE VOTING POWER

                   Number of                   0
                   Shares             -----------------------------------------
                   Beneficially       6        SHARED VOTING POWER
                   Owned by
                   Each                        1,606,257
                   Reporting          -----------------------------------------
                   Person             7        SOLE DISPOSITIVE POWER
                   With
                                               0
                                      -----------------------------------------
                                      8        SHARED DISPOSITIVE POWER

                                               1,606,257
-------------------------------------------------------------------------------
                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
                  1,606,257
-------------------------------------------------------------------------------
                  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
                  CERTAIN SHARES
10                                                                          |_|

-------------------------------------------------------------------------------
                  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11
                  6.1%
-------------------------------------------------------------------------------
                  TYPE OF REPORTING PERSON
12
                  00
-------------------------------------------------------------------------------




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CUSIP NO. 3741633103                                          PAGE 3 OF 8 PAGES
---------------------                                         -----------------



------------------------------------------------------------------------------
                  NAME OF REPORTING PERSON/
1                 I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

                  Rose Glen Capital Management, L.P.
-------------------------------------------------------------------------------
                  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP       (a)|_|
2                                                                        (b)|_|
-------------------------------------------------------------------------------
                  SEC USE ONLY
3
-------------------------------------------------------------------------------
                  CITIZENSHIP OR PLACE OF ORGANIZATION
4
                  Delaware
-------------------------------------------------------------------------------
                                      5        SOLE VOTING POWER

                   Number of                   0
                   Shares             -----------------------------------------
                   Beneficially       6        SHARED VOTING POWER
                   Owned by
                   Each                        1,606,257
                   Reporting          -----------------------------------------
                   Person             7        SOLE DISPOSITIVE POWER
                   With
                                               0
                                      -----------------------------------------
                                      8        SHARED DISPOSITIVE POWER

                                               1,606,257
-------------------------------------------------------------------------------
                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
                  1,606,257
-------------------------------------------------------------------------------
                  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
                  CERTAIN SHARES
10                                                                          |_|

-------------------------------------------------------------------------------
                  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11
                  6.1%
-------------------------------------------------------------------------------
                  TYPE OF REPORTING PERSON
12
                  PN
-------------------------------------------------------------------------------




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CUSIP NO. 3741633103                                          PAGE 4 OF 8 PAGES
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------------------------------------------------------------------------------
                  NAME OF REPORTING PERSON/
1                 I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (Entities Only)

                  RGC General Partner Corp.
-------------------------------------------------------------------------------
                  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP       (a)|_|
2                                                                        (b)|_|
-------------------------------------------------------------------------------
                  SEC USE ONLY
3
-------------------------------------------------------------------------------
                  CITIZENSHIP OR PLACE OF ORGANIZATION
4
                  Delaware
-------------------------------------------------------------------------------
                                      5        SOLE VOTING POWER

                   Number of                   0
                   Shares             -----------------------------------------
                   Beneficially       6        SHARED VOTING POWER
                   Owned by
                   Each                        1,606,257
                   Reporting          -----------------------------------------
                   Person             7        SOLE DISPOSITIVE POWER
                   With
                                               0
                                      -----------------------------------------
                                      8        SHARED DISPOSITIVE POWER

                                               1,606,257
-------------------------------------------------------------------------------
                  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
                  1,606,257
-------------------------------------------------------------------------------
                  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
                  CERTAIN SHARES
10                                                                          |_|

-------------------------------------------------------------------------------
                  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11
                  6.1%
-------------------------------------------------------------------------------
                  TYPE OF REPORTING PERSON
12
                  CO
-------------------------------------------------------------------------------




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CUSIP NO. 3741633103                                          PAGE 5 OF 8 PAGES
---------------------                                         -----------------


ITEM 1(a).        NAME OF ISSUER:  Geron Corporation ("Issuer")



ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

                  230 Constitution Drive, Menlo Park, California 94025


ITEM 2(a).        NAME OF PERSON FILING
ITEM 2(b).        ADDRESS OF PRINCIPAL BUSINESS OFFICE
ITEM 2(c).        CITIZENSHIP:

                  RGC International Investors, LDC ("RGC")
                  c/o SEI Fund Resources International, Ltd.
                  Styne House, Upper Hatch Street
                  Dublin 2 Ireland
                  Cayman Islands limited duration company

                  Rose Glen Capital Management, L.P. ("Rose Glen")
                  3 Bala Plaza East, Suite 501
                  251 St. Asaphs Road
                  Bala Cynwyd, Pennsylvania 19004
                  Delaware limited partnership

                  RGC General Partner Corp. ("Partner")
                  3 Bala Plaza East, Suite 501
                  251 St. Asaphs Road
                  Bala Cynwyd, Pennsylvania 19004
                  Delaware corporation

                  RGC is a private investment fund. Rose Glen is the
                  investment manager of RGC, and Partner is the general
                  partner of Rose Glen.

ITEM 2(d).        TITLE OF CLASS OF SECURITIES:
                  Common Stock, par value $.001 per share (the
                  "Common Stock").

ITEM 2(e).        CUSIP NUMBER:  374163103


ITEM 3.           IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(b),OR
                  13D-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

                  Not Applicable.

                  IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(c),
                  CHECK THIS BOX. |X|




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CUSIP NO. 3741633103                                          PAGE 6 OF 8 PAGES
---------------------                                         -----------------



ITEM 4.           OWNERSHIP.


                  (a)      Amount beneficially owned:

                           1,606,257 shares of Common Stock (1)

                  (b)      Percent of Class:

                           Approximately 6.1% as of the date of filing this
                           statement. (Based on 24,739,397 shares of Common
                           Stock issued and outstanding as of October 29,
                           2002 per the Issuer's Quarterly Report on Form
                           10-Q for the quarterly period ended September 30,
                           2002.) (1)



--------------


(1) The beneficial ownership reported herein represents 6.1% of the
outstanding Common Stock on December 31, 2002 and consists of 1,606,257
shares of Common Stock that are currently issuable within 60 days of December
31, 2002, including (i) 771,421 shares of Common Stock currently issuable
upon conversion of $15,000,000 aggregate principal amount of a Series D
Amended and Restated Convertible Debenture (the "Series D Debentures") and
(ii) upon exercise of two Common Stock Purchase Warrants to purchase up to
834,836 shares of Common Stock, issued in connection with the Series D
Debentures (the "Series D Warrants").

The terms of the the Series D Debentures and the Series D Warrants
(collectively, the "Securities") provide that the Securities are convertible or
exercisable on any given date only to the extent that the number of shares of
Common Stock then issuable upon the conversion or exercise of the Securities,
together with any other shares of Common Stock beneficially owned by the
Reporting Persons or any of their affiliates (excluding for this purpose shares
of Common Stock which may be deemed beneficially owned through the ownership of
the unconverted or unexercised Securities) would not exceed 9.9% of the Common
Stock then issued and outstanding. Accordingly, the Reporting Persons' ability
to fully convert or exercise the Securities may be limited by the terms of the
Securities.





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CUSIP NO. 3741633103                                          PAGE 7 OF 8 PAGES
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                  (c)      Number of shares as to which such persons have:

                           (i)      Sole power to vote or to direct the vote:

                                    0

                           (ii)     Shared power to vote or to direct the vote:

                                    See Item 4(a) above.

                           (iii)    Sole power to dispose or to direct the
                                    disposition of:

                                    0

                           (iv)     Shared power to dispose or to direct the
                                    disposition of:

                                    See Item 4(a) above.

ITEM 5.          OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

                 Not Applicable.

ITEM 6.          OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER
                 PERSON.

                 RGC has granted to Rose Glen, as investment manager, the sole
                 power to manage RGC's investments.

ITEM 7.          IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
                 ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
                 COMPANY.

                 Not Applicable.

ITEM 8.          IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

                 Not Applicable.

ITEM 9.          NOTICE OF DISSOLUTION OF GROUP.

                 Not Applicable





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CUSIP NO. 3741633103                                          PAGE 8 OF 8 PAGES
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ITEM 10.         CERTIFICATIONS.

                 By signing below I certify that, to the best of my knowledge
                 and belief, the securities referred to above were not acquired
                 and are not held for the purpose of or with the effect of
                 changing or influencing the control of the issuer of the
                 securities and were not acquired and are not held in connection
                 with or as a participant in any transaction having that purpose
                 or effect.

                                         SIGNATURES

                 After reasonable inquiry and to the best of my knowledge and
                 belief, I certify that the information set forth in this
                 statement is true, complete and correct.

                                   RGC International Investors, LDC
                                   By:   Rose Glen Capital Management, L.P.
                                         By:  RGC General Partner Corp.


Dated: January 15, 2003            By:  /s/ Gerald F. Stahlecker
                                         --------------------------------------
                                         Gerald F. Stahlecker
                                         Managing Director

                                    Rose Glen Capital Management, L.P.
                                    By:  RGC General Partner Corp.


Dated: January 15, 2003            By:  /s/ Gerald F. Stahlecker
                                         --------------------------------------
                                         Gerald F. Stahlecker
                                         Managing Director


                                    RGC General Partner Corp.

Dated: January 15, 2003            By:  /s/ Gerald F. Stahlecker
                                         --------------------------------------
                                         Gerald F. Stahlecker
                                         Managing Director




                                                                       EXHIBIT A

                       JOINT FILING AGREEMENT

         In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act
of 1934, as amended, the undersigned hereby agree to the joint filing with all
other Reporting Persons (as such term is used in the Schedule 13G/A referred to
below) on behalf of each of them of a statement on Schedule 13G/A (including
amendments thereto) with respect to the Common Stock, par value $.001 per share,
of Geron Corporation and that this Agreement be included as an Exhibit to such
joint filing. This Agreement may be executed in any number of counterparts all
of which taken together shall constitute one and the same instrument.

     IN WITNESS WHEREOF, the undesigned hereby execute this Agreement this 15th
day of January, 2003.

                                    RGC International Investors, LDC
                                    By:   Rose Glen Capital Management, L.P.
                                    By:   RGC General Partner Crp.


Dated: January 15, 2003            By:   /s/ Gerald F. Stahlecker
                                          ------------------------------------
                                          Gerald F. Stahlecker
                                          Managing Director

                                    Rose Glen Capital Management, L.P.
                                    By:   RGC General Partner Corp.


Dated: January 15, 2003            By:   /s/ Gerald F. Stahlecker
                                          ------------------------------------
                                          Gerald F. Stahlecker
                                          Managing Director


                                    RGC General Partner Corp.

Dated: January 15, 2003            By:   /s/ Gerald F. Stahlecker
                                          ------------------------------------
                                          Gerald F. Stahlecker
                                          Managing Director