FORM 4

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

    Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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(f) of the Investment Company Act of 1940

OMB Number: 3235-0287
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Filed By Romeo & Dye's Instant Form 4 Filer
www.section16.net

1. Name and Address of Reporting Person*

Niacaris, Jeannine M.

2. Issuer Name and Ticker or Trading Symbol
Geron Corporation (GERN)

6. Relationship of Reporting Person(s)
to Issuer (Check all applicable)
    Director                                       10% Owner
X Officer (give title below)          Other (specify below)

VP Human Resources and Administrative Services

(Last)      (First)     (Middle)

c/o Geron Corporation
230 Constitution Drive

3. I.R.S. Identification Number
of Reporting Person,
if an entity (voluntary)

7. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
    Form filed by More than One Reporting Person

(Street)

Menlo Park, CA 94025

(City)     (State)     (Zip)

Table I — Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1. Title of Security
(Instr. 3)

2. Trans-
action
Date
(Month/ Day/
Year)

3. Trans-
action Code
(Instr. 8)

4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 & 5)

5. Amount of
Securities
Beneficially
Owned at
End of Month
(Instr. 3 & 4)

6. Owner-
ship Form:
Direct (D)
or Indirect (I)
(Instr. 4)

7. Nature of Indirect
Beneficial Ownership
(Instr. 4)

Code

V

Amount

(A)
or
(D)

Price

Common Stock⁽¹⁾

06/28/02

A

V

694

A

$3.89

1,451

D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security

(Instr. 3)

2. Conver-
sion or
Excercise
Price of Derivative Security

3. Trans-
action Date

(Month/
Day/
Year)

4. Trans-
action
Code

(Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D)

(Instr. 3, 4 & 5)

6. Date Exercisable
and Expiration
Date
(Month/Day/
Year)

7. Title and Amount of Underlying Securities
(Instr. 3 & 4)

8. Price of Derivative Security
(Instr. 5)

9. Number of
Derivative
Securities
Beneficially
Owned at
End of Month
(Instr. 4)

10. Owner-
ship Form
of Deriv-
ative
Security:
Direct (D)
or Indirect (I)
(Instr. 4)

11. Nature of Indirect Beneficial Ownership
(Instr. 4)

Code

V

(A)

(D)

Date Exer-cisable

Expira-
tion
Date

Title

Amount or Number of
Shares

Employee Stock Option (right to buy)

$8.23

6/27/02

A

V

30,000

 ⁽²⁾

6/27/12

Common Stock

30,000

145,000

D

Employee Stock Option (right to buy)

$3.76

9/5/02

A

60,000

 ⁽³⁾

9/5/12

Common Stock

60,000

205,000

D

Explanation of Responses:

(1) Acquired under the 1996 Employee Stock Purchase Plan.
(2) The option is exercisable in a series of 48 consecutive monthly installments commencing January 1, 2002 provided the optionee continues to provide services to the company.
(3) The option is exercisable in a series of 48 consecutive monthly installments commencing September 5, 2002 provided the optionee continues to provide services to the company.

**Intentional misstatements or omissions of facts constitute Federal Criminal Violations.
See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed.
          If space provided is insufficient, See Instruction 6 for procedure.

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