Insider Transactions Reported by 23 Insiders of GERON CORP

Symbol: GERN on Nasdaq
Location: Foster City, CA

Quick Takeaways

GERN - GERON CORP has 23 insiders with reported activity on this page.
Net insider value flow over the last year: -$3,451.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $15,667; sell value: $19,118.
Net share flow: +3,445.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to selling over the last 12 months. Net value: -$3,451.

Buys

$15,667

Shares: 13,300

Insiders: 1

Sells

$19,119

Shares: 9,855

Insiders: 1

Net

-$3,451

Shares: +3,445

Insiders: 0

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	0	9,855	$0	$19,119	-$19,119
3-6	0	0	$0	$0	$0
6-9	0	0	$0	$0	$0
9-12	13,300	0	$15,667	$0	+$15,667

GERON CORP executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
John A. Scarlett	Chairman, President and CEO, Director	$2,111,058			Mixed	27 Feb 2025
Andrew J. Grethlein	EVP, Chief Operating Officer	$637,980			Mixed	18 Feb 2025
James Ziegler	EVP, Chief Commercial Officer	$565,573			Mixed	27 Feb 2025
Michelle Robertson	Evp, Chief Financial Officer	$535,501	-$19,119	-3.4%	Mixed	17 Feb 2026
Scott A. Samuels	EVP, Chief Legal Officer	$516,886			Mixed	27 Feb 2025
Robert J. Spiegel	Director	$263,613			Mixed	31 Mar 2026
Karin Eastham	Director	$248,627			Mixed	13 Jan 2023
Bryan Lawlis V	Director	$15,667	+$15,667	+100%	Filing P/S	21 May 2025
Ahmed ElNawawi	EVP, Chief Commercial Officer	$13,700			Mixed	20 Oct 2025
Faye Feller	EVP, Chief Medical Officer	$0			Mixed	10 Jun 2024
Anil Kapur	EVP, Corp Strategy & CCO	$0			Mixed	10 Jun 2024
Stephen Rosenfield	EVP, Chief Legal Off & Sec				Mixed	16 Feb 2022
Elizabeth G. O'Farrell	Director				Mixed	21 May 2025
Olivia Kyusuk Bloom	EVP, Chief Financial Officer				Mixed	15 Aug 2023
Dawn Carter Bir	Interim President and CEO, Director				Mixed	21 May 2025
Susan Molineaux	Director				Mixed	21 May 2025
Gaurav Aggarwal	Director				Mixed	21 May 2025
Aleksandra Rizo	EVP, Chief Medical Officer				Mixed	16 Feb 2022
John F. McDonald	Director				Mixed	21 May 2025
Harout Semerjian	President and CEO, Director				Mixed	07 Aug 2025
Joseph Eid	EVP, R&D; Chief Medical Office				Mixed	17 Feb 2026
Patricia S. Andrews	Director				Mixed	25 Mar 2026
Constantine Chinoporos	Director				Mixed	25 Mar 2026

Top shareholders of GERON CORP (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
RA CAPITAL MANAGEMENT, L.P.	13D/G 13F	Company	9.9%	63,988,106	$88,303,586	$0	31 Mar 2025	13D/G 13F
BlackRock, Inc.	13F	Company	7.2%	45,913,344	$60,605,613	—	31 Dec 2025	13F
Soleus Capital Master Fund, L.P.	13D/G	—	5.2%	33,008,659	$53,143,941	$0	25 Feb 2026	13D/G
VANGUARD GROUP INC	13F	Company	5.6%	35,660,969	$47,072,479	—	31 Dec 2025	13F
Deep Track Capital, LP	13F 13D/G	Company	5.1% from 13D/G	32,511,271	$42,914,878	—	31 Dec 2025	13F 13D/G
Vivo Capital, LLC	13F	Company	4.3%	27,225,292	$35,937,385	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	4.2%	26,867,322	$35,464,865	—	31 Dec 2025	13F
Soleus Capital Management, L.P.	13F	Company	3.7%	23,290,000	$30,742,800	—	31 Dec 2025	13F
Eversept Partners, LP	13F	Company	2.8%	17,659,983	$23,311,178	—	31 Dec 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	2.5%	16,174,398	$21,350,205	—	31 Dec 2025	13F
Clearbridge Investments, LLC	13F	Company	2.2%	14,242,953	$18,800,698	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	2.1%	13,027,335	$17,199,472	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	2%	12,603,418	$16,636,511	—	31 Dec 2025	13F
Vestal Point Capital, LP	13F	Company	1.8%	11,320,000	$14,942,400	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	1.6%	9,925,786	$13,102,038	—	31 Dec 2025	13F
Aberdeen Group plc	13F	Company	1.5%	9,527,083	$12,575,750	—	31 Dec 2025	13F
Nantahala Capital Management, LLC	13F	Company	1.4%	9,025,000	$11,913,000	—	31 Dec 2025	13F
FMR LLC	13F	Company	1.3%	8,076,965	$10,661,594	—	31 Dec 2025	13F
Woodline Partners LP	13F	Company	1.2%	7,504,094	$9,905,404	—	31 Dec 2025	13F
DEUTSCHE BANK AG\	13F	Company	0.81%	5,140,809	$6,785,868	—	31 Dec 2025	13F
SEGALL BRYANT & HAMILL, LLC	13F	Company	0.8%	5,048,936	$6,664,596	—	31 Dec 2025	13F
Pale Fire Capital SE	13F	Company	0.75%	4,788,594	$6,320,944	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.74%	4,726,605	$6,239,119	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.73%	4,603,876	$6,077,116	—	31 Dec 2025	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.71%	4,514,063	$5,958,563	—	31 Dec 2025	13F
ALGERT GLOBAL LLC	13F	Company	0.55%	3,499,747	$4,620,000	—	31 Dec 2025	13F
Kynam Capital Management, LP	13F	Company	0.54%	3,456,318	$4,562,340	—	31 Dec 2025	13F
UBS Group AG	13F	Company	0.52%	3,273,705	$4,321,291	—	31 Dec 2025	13F
Qube Research & Technologies Ltd	13F	Company	0.49%	3,107,529	$4,101,938	—	31 Dec 2025	13F
S.c.a. Candriam	13F	Individual	0.45%	2,839,484	$3,748,278	—	31 Dec 2025	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.44%	2,801,468	$3,697,938	—	31 Dec 2025	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.43%	2,698,010	$3,561,374	—	31 Dec 2025	13F
EDMOND DE ROTHSCHILD HOLDING S.A.	13F	Company	0.37%	2,330,000	$3,075,600	—	31 Dec 2025	13F
Nuveen, LLC	13F	Company	0.32%	1,999,843	$2,639,793	—	31 Dec 2025	13F
John A. Scarlett	3/4/5	Chairman, President and CEO, Director	— mixed-class rows	3,004,500 mixed-class rows	$2,111,058	—	27 Feb 2025	3/4/5
BARCLAYS PLC	13F	Company	0.25%	1,575,429	$2,079,567	—	31 Dec 2025	13F
Bank of New York Mellon Corp	13F	Company	0.25%	1,573,836	$2,077,462	—	31 Dec 2025	13F
Affinity Asset Advisors, LLC	13F	Company	0.24%	1,500,000	$1,980,000	—	31 Dec 2025	13F
NAN FUNG TRINITY (HK) Ltd	13F	Company	0.22%	1,373,550	$1,813,086	—	31 Dec 2025	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.2%	1,296,163	$1,710,935	—	31 Dec 2025	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	0.19%	1,232,288	$1,626,622	—	31 Dec 2025	13F
Invesco Ltd.	13F	Company	0.19%	1,225,658	$1,617,869	—	31 Dec 2025	13F
HRT FINANCIAL LP	13F	Company	0.19%	1,200,225	$1,584,000	—	31 Dec 2025	13F
Squarepoint Ops LLC	13F	Company	0.18%	1,130,076	$1,491,700	—	31 Dec 2025	13F
World Investment Advisors	13F	Company	0.16%	1,033,779	$1,364,589	—	31 Dec 2025	13F
JANE STREET GROUP, LLC	13F	Company	0.16%	1,013,003	$1,337,165	—	31 Dec 2025	13F
Swiss National Bank	13F	Company	0.15%	926,100	$1,222,452	—	31 Dec 2025	13F
Almitas Capital LLC	13F	Company	0.14%	896,323	$1,183,146	—	31 Dec 2025	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.13%	855,141	$1,128,786	—	31 Dec 2025	13F
MML INVESTORS SERVICES, LLC	13F	Company	0.13%	834,115	$1,101,032	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for GERON CORP

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Robert J. Spiegel	GERN	Common Stock	Award	2.7%			5,243	199,707	31 Mar 2026	Direct
Constantine Chinoporos	GERN	Stock Option (Right to Buy)	Award				270,000	270,000	25 Mar 2026	Direct
Patricia S. Andrews	GERN	Stock Option (Right to Buy)	Award				270,000	270,000	25 Mar 2026	Direct
Michelle Robertson	GERN	Common Stock	Sale	-35.8%	$19,119	$1.94	-9,855	17,645	18 Feb 2026	Direct
Michelle Robertson	GERN	Common Stock	Options Exercise				27,500	27,500	18 Feb 2026	Direct
Michelle Robertson	GERN	Restricted Stock Units	Options Exercise	-25%			-27,500	82,500	18 Feb 2026	Direct
Joseph Eid	GERN	Stock Option (Right to Buy)	Award				2,220,000	2,220,000	17 Feb 2026	Direct
Michelle Robertson	GERN	Stock Option (Right to Buy)	Award				1,660,000	1,660,000	17 Feb 2026	Direct
Robert J. Spiegel	GERN	Common Stock	Award	3.14%			5,918	194,464	31 Dec 2025	Direct
Ahmed ElNawawi	GERN	Stock Option (right to buy)	Award				3,000,000	3,000,000	20 Oct 2025	Direct
Robert J. Spiegel	GERN	Common Stock	Award	3.12%			5,702	188,546	30 Sep 2025	Direct
Harout Semerjian	GERN	Stock Option (right to buy)	Award				11,000,000	7,000,000	07 Aug 2025	Direct
Robert J. Spiegel	GERN	Common Stock	Award	3.12%			5,540	182,844	30 Jun 2025	Direct
Gaurav Aggarwal	GERN	Stock Option (right to buy)	Award				180,000	180,000	21 May 2025	Direct
Dawn C. Bir	GERN	Stock Option (right to buy)	Award				180,000	180,000	21 May 2025	Direct
Bryan Lawlis V	GERN	Stock Option (right to buy)	Award				180,000	180,000	21 May 2025	Direct
John F. McDonald	GERN	Stock Option (right to buy)	Award				180,000	180,000	21 May 2025	Direct
Susan Molineaux	GERN	Stock Option (right to buy)	Award				180,000	180,000	21 May 2025	Direct
Elizabeth G. O'Farrell	GERN	Stock Option (right to buy)	Award				180,000	180,000	21 May 2025	Direct
Robert J. Spiegel	GERN	Stock Option (right to buy)	Award				180,000	180,000	21 May 2025	Direct
Bryan Lawlis V	GERN	Common Stock	Purchase		$15,667	$1.18	13,300	13,300	09 May 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.