Geron Corporation

GERNNASDAQHealthcare● Active

$1.13

$-0.04(-3.42%)

Market Cap$724918701

P/E Ratio—

52W High$2.01

52W Low$1.04

Avg Volume16.9M

Open$1.19

Beta0.60

Insider Trades Ownership Employees

Geron Corporation (GERN) Insider Trading

Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.

SEC EDGAR · FMP · GERN · as of Jun 8, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

0.00

Buy/Sell (by trades)

Overall sentiment

BEARISH

↑ Buy 0%Active transactions only · RSU vesting excluded100% Sell ↓

Geron Corporation insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only

As of Jun 8, 2026

GERN insider buying and selling by quarter

GERN insider selling · GERN insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

11.0M5.5M0

2024 Q3

2024 Q4

2025 Q1

2025 Q2

2025 Q3

2025 Q4

2026 Q1

2026 Q2

Mobile shows last 4Q · Desktop shows full 8Q

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters

As of Jun 8, 2026

Active insiders

Most active in past 12 months · GERN ceo insider trading

Showing all insiders · Click a card to filter the transactions table below

▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API

Recent insider transactions

GERN executive sell shares · GERN board member insider trading · GERN insider trading SEC filing

Showing 29 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
Mar 31, 2026	Spiegel Robert J. Director	Award	5,243	$1.49	$8K	199,707	Form 4
Feb 18, 2026	ROBERTSON MICHELLE EVP, CHIEF FINANCIAL OFFICER	Option	27,500	—	—	27,500	Form 4
Feb 18, 2026	ROBERTSON MICHELLE EVP, CHIEF FINANCIAL OFFICER	Sale	9,855	$1.94	$19K	17,645	Form 4
Dec 31, 2025	Spiegel Robert J. Director	Award	5,918	$1.32	$8K	194,464	Form 4
Sep 30, 2025	Spiegel Robert J. Director	Award	5,702	$1.37	$8K	188,546	Form 4
Jun 30, 2025	Spiegel Robert J. Director	Award	5,540	$1.41	$8K	182,844	Form 4
May 9, 2025	LAWLIS V BRYAN Director	Purchase	13,300	$1.18	$16K	13,300	Form 4
Mar 31, 2025	Spiegel Robert J. Director	Award	4,913	$1.59	$8K	177,304	Form 4
Feb 27, 2025	Samuels Scott Alan EVP, Chief Legal Officer	Purchase	15,000	$1.61	$24K	26,682	Form 4
Feb 27, 2025	SCARLETT JOHN A Chairman, President and CEO · Director	Purchase	12,500	$1.76	$22K	12,500	Form 4
Feb 27, 2025	Ziegler James EVP, Chief Commercial Officer	Purchase	100,000	$1.60	$160K	100,000	Form 4
Dec 31, 2024	Spiegel Robert J. Director	Award	2,206	—	—	172,391	Form 4
Sep 30, 2024	Spiegel Robert J. Director	Award	1,767	—	—	170,185	Form 4
Jul 8, 2024	GRETHLEIN ANDREW J EVP, Chief Operating Officer	Option	674,348	$1.72	$1.16M⚡	674,348	Form 4
Jul 8, 2024	GRETHLEIN ANDREW J EVP, Chief Operating Officer	Sale	674,348	$4.56	$3.07M⚡	0	Form 4
Jun 28, 2024	Spiegel Robert J. Director	Award	1,916	—	—	168,418	Form 4
Mar 29, 2024	Spiegel Robert J. Director	Award	2,462	—	—	166,502	Form 4
Jun 10, 2024	Feller Faye EVP, Chief Medical Officer	Option	155,400	$1.29	$201K	155,400	Form 4
Jun 10, 2024	Feller Faye EVP, Chief Medical Officer	Option	112,500	$1.06	$119K	112,500	Form 4
Jun 10, 2024	Feller Faye EVP, Chief Medical Officer	Option	20,000	$1.06	$21K	20,000	Form 4
Jun 10, 2024	Feller Faye EVP, Chief Medical Officer	Sale	287,900	$4.63	$1.33M⚡	0	Form 4
Jun 10, 2024	Kapur Anil EVP, Corp Strategy & CCO	Option	421,875	$1.06	$447K	421,875	Form 4
Jun 10, 2024	Kapur Anil EVP, Corp Strategy & CCO	Sale	421,875	$4.64	$1.96M⚡	0	Form 4
Jun 4, 2024	SCARLETT JOHN A Chairman, President and CEO · Director	Sale	600,000	$4.00	$2.40M⚡	600,000	Form 4
Jun 4, 2024	SCARLETT JOHN A Chairman, President and CEO · Director	Option	600,000	$2.54	$1.52M⚡	600,000	Form 4

Spiegel Robert J.

Director

Award

Date

Mar 31

5,243

Price

$1.49

Value

$8K

View Form 4 on SEC.gov

ROBERTSON MICHELLE

EVP, CHIEF FINANCIAL OFFICER

Option

Date

Feb 18

27,500

Price

—

Value

—

View Form 4 on SEC.gov

ROBERTSON MICHELLE

EVP, CHIEF FINANCIAL OFFICER

Sale

Date

Feb 18

9,855

Price

$1.94

Value

$19K

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Dec 31

5,918

Price

$1.32

Value

$8K

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Sep 30

5,702

Price

$1.37

Value

$8K

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Jun 30

5,540

Price

$1.41

Value

$8K

View Form 4 on SEC.gov

LAWLIS V BRYAN

Director

Purchase

Date

May 9

13,300

Price

$1.18

Value

$16K

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Mar 31

4,913

Price

$1.59

Value

$8K

View Form 4 on SEC.gov

Samuels Scott Alan

EVP, Chief Legal Officer

Purchase

Date

Feb 27

15,000

Price

$1.61

Value

$24K

View Form 4 on SEC.gov

SCARLETT JOHN A

Chairman, President and CEO · Director

Purchase

Date

Feb 27

12,500

Price

$1.76

Value

$22K

View Form 4 on SEC.gov

Ziegler James

EVP, Chief Commercial Officer

Purchase

Date

Feb 27

100,000

Price

$1.60

Value

$160K

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Dec 31

2,206

Price

—

Value

—

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Sep 30

1,767

Price

—

Value

—

View Form 4 on SEC.gov

GRETHLEIN ANDREW J

EVP, Chief Operating Officer

Option

Date

Jul 8

674,348

Price

$1.72

Value

$1.16M ⚡

View Form 4 on SEC.gov

GRETHLEIN ANDREW J

EVP, Chief Operating Officer

Sale

Date

Jul 8

674,348

Price

$4.56

Value

$3.07M ⚡

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Jun 28

1,916

Price

—

Value

—

View Form 4 on SEC.gov

Spiegel Robert J.

Director

Award

Date

Mar 29

2,462

Price

—

Value

—

View Form 4 on SEC.gov

Feller Faye

EVP, Chief Medical Officer

Option

Date

Jun 10

155,400

Price

$1.29

Value

$201K

View Form 4 on SEC.gov

Feller Faye

EVP, Chief Medical Officer

Option

Date

Jun 10

112,500

Price

$1.06

Value

$119K

View Form 4 on SEC.gov

Feller Faye

EVP, Chief Medical Officer

Option

Date

Jun 10

20,000

Price

$1.06

Value

$21K

View Form 4 on SEC.gov

Feller Faye

EVP, Chief Medical Officer

Sale

Date

Jun 10

287,900

Price

$4.63

Value

$1.33M ⚡

View Form 4 on SEC.gov

Kapur Anil

EVP, Corp Strategy & CCO

Option

Date

Jun 10

421,875

Price

$1.06

Value

$447K

View Form 4 on SEC.gov

Kapur Anil

EVP, Corp Strategy & CCO

Sale

Date

Jun 10

421,875

Price

$4.64

Value

$1.96M ⚡

View Form 4 on SEC.gov

SCARLETT JOHN A

Chairman, President and CEO · Director

Sale

Date

Jun 4

600,000

Price

$4.00

Value

$2.40M ⚡

View Form 4 on SEC.gov

SCARLETT JOHN A

Chairman, President and CEO · Director

Option

Date

Jun 4

600,000

Price

$2.54

Value

$1.52M ⚡

View Form 4 on SEC.gov

⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar

1 / 2

▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —

About GERN insider trading

GERN insider trades

Geron Corporation (GERN) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Spiegel Robert J. (Director), ROBERTSON MICHELLE (EVP, CHIEF FINANCIAL OFFICER). Over the past 12 months, 2 insiders have filed transactions with the SEC. GERN insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For Geron Corporation's institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →

Buy/Sell signal logic

acquisitionOrDisposition field:

A = Acquisition (buy) · D = Disposition (sell)

RSU vesting (M-Exempt) excluded from sentiment

Form 4SEC filing required within 2 business days of any insider transaction

10b5-1Pre-scheduled trading plan that allows insiders to sell on autopilot

Open MktDirect purchase or sale on the open market (excludes awards, options)

Ownership SEC filings Financial statements Price history Forecast & ratings Earnings

Frequently asked questions

GERN insider trading · 5 questions

The insiders of Geron Corporation (GERN) include executives and directors such as Spiegel Robert J. (Director), ROBERTSON MICHELLE (EVP, CHIEF FINANCIAL OFFICER), among others. Over the past 12 months, 2 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

GERN board member insider tradingwho are GERN insidersGERN insider rosterGeron Corporation executives insider activity

▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026