Geron director awarded 270,000 stock options

Geron Corp director Constantine Chinoporos received a grant of stock options, not an open-market share purchase.

Accepted by SEC EDGAR 03/26/2026 - 05:37 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Geron Corp director Constantine Chinoporos received a grant of stock options, not an open-market share purchase. The award covers 270,000 options to buy Geron common stock at an exercise price of $1.57 per share and expires on March 24, 2036.

The options will vest in three equal annual installments starting on March 25, 2027, subject to his continuous service with the company through each vesting date. Following this grant, he holds 270,000 stock options directly according to the filing.

Insider Trade Summary

Grant/Award: 270,000 shares

Grant/Award 1 txn

Insider Chinoporos Constantine

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	270,000	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 270,000 contracts (Direct)

Footnotes (1)

1. F1. The option shall vest and become exercisable in three equal annual installments starting on March 25, 2027, subject to the Reporting Person's continuous service (as defined in the Issuer's 2018 Equity Incentive Plan) with the Issuer through each such vesting date.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Geron (GERN) director Constantine Chinoporos report in this Form 4?

He reported receiving a grant of 270,000 stock options, not buying shares on the market. These options give him the right to purchase Geron common stock at a fixed exercise price of $1.57 per share before expiration.

Is the Geron (GERN) Form 4 transaction a stock purchase or an option grant?

The transaction is an option grant, coded “A” for award, not an open-market stock purchase. Chinoporos was awarded 270,000 options as compensation, with an exercise price of $1.57 per share and future vesting conditions attached.

What are the vesting terms of Constantine Chinoporos’ options at Geron (GERN)?

The 270,000 options vest in three equal annual installments starting on March 25, 2027. Vesting is contingent on his continuous service with Geron through each vesting date, as defined in the company’s 2018 Equity Incentive Plan.

When do Constantine Chinoporos’ Geron (GERN) stock options expire?

The stock options granted to Chinoporos expire on March 24, 2036. After expiration, any unexercised options become worthless, so they must be exercised before that date for him to acquire Geron common shares at $1.57 per share.

How many Geron (GERN) stock options does Constantine Chinoporos hold after this filing?

After this grant, he directly holds 270,000 stock options according to the Form 4. Each option represents the right to buy one share of Geron common stock at an exercise price of $1.57, subject to vesting and the stated expiration date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Chinoporos Constantine

(Last) (First) (Middle)

C/O GERON CORPORATION

919 EAST HILLSDALE BOULEVARD, SUITE 250

(Street)

FOSTER CITY CALIFORNIA 94404

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
GERON CORP [ GERN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/25/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

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. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$1.57	03/25/2026		A		270,000		(1)	03/24/2036	Common Stock	270,000	$0	270,000	D

Explanation of Responses:

1. The option shall vest and become exercisable in three equal annual installments starting on March 25, 2027, subject to the Reporting Person's continuous service (as defined in the Issuer's 2018 Equity Incentive Plan) with the Issuer through each such vesting date.

	/s/ Michelle Robertson, Attorney-in-Fact	03/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)