Geron Corporation

Last updated September 27, 2026

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Organization details

Legal name: Geron Corporation
Ownership: Public
Status: Active
Sector (GICS): Health Care
SIC code: 2834 — Pharmaceutical Preparations
Jurisdiction of incorporation: Delaware
Headquarters city: Foster City
Headquarters state / province: California
Headquarters country: United States
Fiscal year end: December
Ticker symbol: GERN
Primary stock exchange: Nasdaq

Identifiers

SEC CIK: 0000886744
EIN: 75-2287752
Wikidata ID: Q5552410

Board of directors

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Constantine Chinoporos · Director
Since 2026
Dawn Carter Bir · Director · Interim President and CEO
Since 2023
Elizabeth G. O'Farrell · Director
Since 2023
Gaurav Aggarwal · Director
Since 2023
Harout Semerjian · Director · President and CEO
Since 2025
John A. Scarlett · Director · Chairman, President and CEO
Since 2023
John F. McDonald · Director
Since 2023
Karin Eastham · Director
Since 2023
Patricia S. Andrews · Director
Since 2026
Robert J. Spiegel · Director
Since 2023
Susan Molineaux · Director
Since 2023
V. Bryan Lawlis · Director
Since 2023

Chief executives

Harout Semerjian · President and CEO

Since August 2025

John A. Scarlett · Chairman, President and CEO

Until August 2025 · Former

Dawn Carter Bir · Interim President and CEO Interim

Until August 2025 · Former

Director election results

Annual meeting of May 20, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Board connections

8 of this board's directors also sit on 12 other boards. 11 are in the same sector.

Shared director Other board Same sector

Crescent Biopharma Inc. Same sector
via Harout Semerjian and Patricia S. Andrews
Bio Green Med Solution Inc.
via Robert J. Spiegel
BioMarin Pharmaceutical Inc. Same sector
via V. Bryan Lawlis
Ernexa Therapeutics Inc. Same sector
via Robert J. Spiegel
Filana Therapeutics Inc. Same sector
via Dawn Carter Bir
LENSAR Inc. Same sector
via Elizabeth G. O'Farrell
Oncolytics Biotech Inc. Same sector
via Patricia S. Andrews
Personalis Inc. Same sector
via Karin Eastham
RenovoRx Inc. Same sector
via Robert J. Spiegel
SpyGlass Pharma Inc. Same sector
via Elizabeth G. O'Farrell
Unicycive Therapeutics Inc. Same sector
via Gaurav Aggarwal
Veracyte Inc. Same sector
via Karin Eastham

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $0; 0 purchases by 0 insiders
Sold, last 12 months: $19,119; 1 sale by 1 insider

Date	Insider	Transaction	Shares	Price	Value
Sep 30, 2026	Robert J. Spiegel Director	Grant or award	+6,351	$1.23	$7,812
Jun 30, 2026	Robert J. Spiegel Director	Grant or award	+6,103	$1.28	$7,812
Mar 31, 2026	Robert J. Spiegel Director	Grant or award	+5,243	$1.49	$7,812
Feb 18, 2026	Michelle Robertson Officer (EVP, CHIEF FINANCIAL OFFICER)	Option exercise	+27,500	—	—
Feb 18, 2026	Michelle Robertson Officer (EVP, CHIEF FINANCIAL OFFICER)	Open-market sale	−9,855	$1.94	$19,119
Dec 31, 2025	Robert J. Spiegel Director	Grant or award	+5,918	$1.32	$7,812
Sep 30, 2025	Robert J. Spiegel Director	Grant or award	+5,702	$1.37	$7,812
Jun 30, 2025	Robert J. Spiegel Director	Grant or award	+5,540	$1.41	$7,811
May 9, 2025	V. Bryan Lawlis Director	Open-market purchase	+13,300	$1.18	$15,694
Mar 31, 2025	Robert J. Spiegel Director	Grant or award	+4,913	$1.59	$7,812
Feb 27, 2025	Samuels Scott Alan Officer (EVP, Chief Legal Officer)	Open-market purchase	+15,000	$1.61	$24,150
Feb 27, 2025	John A. Scarlett Director, Officer (Chairman, President and CEO)	Open-market purchase	+12,500	$1.77	$22,125
Feb 27, 2025	Ziegler James Officer (EVP, Chief Commercial Officer)	Open-market purchase	+100,000	$1.60	$160,000
Dec 31, 2024	Robert J. Spiegel Director	Grant or award	−2,206	—	—
Sep 30, 2024	Robert J. Spiegel Director	Grant or award	−1,767	—	—

Peers

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Questions about Geron Corporation

Who is the CEO of Geron Corporation?

Harout Semerjian has been Geron Corporation's President and CEO since August 2025.

How many directors are on Geron Corporation's board?

Geron Corporation's board has 12 directors: Constantine Chinoporos, Dawn Carter Bir, Elizabeth G. O'Farrell, Gaurav Aggarwal, Harout Semerjian, John A. Scarlett, John F. McDonald, Karin Eastham, Patricia S. Andrews, Robert J. Spiegel and 2 others.

Are Geron Corporation insiders buying or selling shares?

Over the last 12 months, Geron Corporation insiders made no open-market purchases and sold $19,119 of shares in 1 sale on the open market, as reported to the SEC on Forms 4 and 5.

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