Geron director granted 220,000 stock options

Geron Corp director Robert J. Spiegel was granted a stock option for 220,000 shares of common stock.

Accepted by SEC EDGAR 05/26/2026 - 07:45 PM EDT

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Form Type

Rhea-AI Filing Summary

Geron Corp director Robert J. Spiegel was granted a stock option for 220,000 shares of common stock. The option has an exercise price of $1.26 per share and expires on May 19, 2036.

The option will vest and become exercisable for 100% of the shares on the earlier of the company’s next annual stockholder meeting or the first anniversary of the grant date, as long as Spiegel remains in continuous service with Geron through that date.

Insider Trade Summary

Grant/Award: 220,000 shares

Grant/Award 1 txn

Insider Spiegel Robert J.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	220,000	$0.00	$0.00

Holdings After Transaction: Stock Option (right to buy) — 220,000 contracts (Direct)

Footnotes (1)

F1. This option will vest and become exercisable as to 100% of the shares of common stock subject to such option on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders or (ii) the first anniversary of the date of grant of such option, subject to the Reporting Person's continuous service with the Issuer through such dates.

Key Figures

Option grant size: 220,000 shares Exercise price: $1.26 per share Expiration date: May 19, 2036 +2 more

5 metrics

Option grant size 220,000 shares Underlying common stock for new option award

Exercise price $1.26 per share Stock option exercise price

Expiration date May 19, 2036 Option term end date

Shares following transaction 220,000 options Derivative securities held after grant

Transaction date May 20, 2026 Date of option grant

Key Terms

Stock Option (right to buy), Grant, award, or other acquisition, exercise price, vest and become exercisable, +1 more

5 terms

Stock Option (right to buy) financial

"security_title: Stock Option (right to buy)"

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

exercise price financial

"conversion_or_exercise_price: 1.2600"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vest and become exercisable financial

"This option will vest and become exercisable as to 100% of the shares"

continuous service financial

"subject to the Reporting Person's continuous service with the Issuer"

FAQ

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

What insider transaction did Geron (GERN) report for Robert J. Spiegel?

Geron reported a grant of stock options to director Robert J. Spiegel. He received options over 220,000 shares of common stock, reflecting a compensation-related award rather than an open-market purchase or sale of existing Geron shares.

How many Geron (GERN) shares are covered by Robert J. Spiegel’s new option grant?

The option grant covers 220,000 shares of Geron common stock. This figure represents the underlying shares that may be acquired upon exercise of the option if vesting conditions are met and the option is exercised in the future.

What is the exercise price of Robert J. Spiegel’s Geron (GERN) stock options?

The exercise price of the stock options is $1.26 per share. This is the price at which Spiegel can buy Geron common stock through the option once it has vested and while it remains unexpired and outstanding.

When do Robert J. Spiegel’s Geron (GERN) stock options vest?

The options vest 100% on the earlier of Geron’s next annual stockholder meeting or the first anniversary of the grant date. Vesting is contingent on Spiegel’s continuous service with Geron through whichever of these two dates occurs first.

When do Robert J. Spiegel’s Geron (GERN) stock options expire?

The options expire on May 19, 2036. After this expiration date, Spiegel will no longer be able to exercise the option to purchase Geron common stock, even if the vesting conditions were previously satisfied.

Is Robert J. Spiegel’s Geron (GERN) transaction an open-market buy or sell?

No, the filing describes a grant of stock options as compensation, not an open-market trade. The transaction code is “A,” indicating a grant, award, or other acquisition of derivative securities, rather than a direct purchase or sale of Geron shares on the market.

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^*

Spiegel Robert J.

(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)
05/20/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (right to buy)	$1.26	05/20/2026		A		220,000		⁽¹⁾	05/19/2036	Common Stock	220,000	$0	220,000	D

Explanation of Responses:

1. This option will vest and become exercisable as to 100% of the shares of common stock subject to such option on the earlier of (i) the date of the next annual meeting of the Issuer's stockholders or (ii) the first anniversary of the date of grant of such option, subject to the Reporting Person's continuous service with the Issuer through such dates.

	/s/ Michelle Robertson, Attorney-in-Fact	05/26/2026
	** 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)

Source: View Original Filing on SEC EDGAR