GERON CORP (GERN) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-07-01

GERON CORP (GERN) has filed 6 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. 1 Form 8-K material event filings were reported by GERN in the last 90 days. InsiderAlpha tracks every GERN SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About GERON CORP (GERN)

SIC classification	Pharmaceutical Preparations (SIC 2834)
SEC CIK	0000886744

90-Day SEC Filing Activity

Form 4 filings (90d)	6
Form 8-K filings (90d)	1
Latest Form 4 filing	2026-07-01

Recent GERN Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-06-30	Spiegel Robert J.	Insider	A — Grant or award	6.1K	$1.28	$8K	SEC
2026-03-31	Spiegel Robert J.	Insider	A — Grant or award	5.2K	$1.49	$8K	SEC
2026-02-18	ROBERTSON MICHELLE	EVP, CHIEF FINANCIAL OFFICER	M — Option exercise	27.5K	$0.00	—	SEC
2026-02-18	ROBERTSON MICHELLE	EVP, CHIEF FINANCIAL OFFICER	S — Open-market sale	9.9K	$1.94	$19K	SEC
2025-09-30	Spiegel Robert J.	Director	A — Grant or award	5.7K	$1.37	$8K	SEC
2025-06-30	Spiegel Robert J.	Director	A — Grant or award	5.5K	$1.41	$8K	SEC
2025-05-09	LAWLIS V BRYAN	Director	P — Open-market purchase	13.3K	$1.18	$16K	SEC
2024-09-30	Spiegel Robert J.	Insider	A — Grant or award	1.8K	$0.00	—	SEC

All transactions sourced from SEC EDGAR Form 4 filings for GERON CORP (GERN). Updated in real time as new filings are submitted to the SEC.

Most-Active GERN Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
Spiegel Robert J.	2	$8K
Bir Dawn Carter	1	—
O'Farrell Elizabeth G.	1	—
Molineaux Susan	1	—
McDonald John F	1	—

Recent GERN Form 8-K Material Events

2026-05-27 — Item 5.02, 5.07, 9.01 [SEC]
2026-03-26 — Item 5.02 · Leadership · neutral [SEC]
Geron Corporation's Board of Directors elected two new Class III directors, Patricia S. Andrews and Constantine Chinoporos, effective immediately. Ms. Andrews was also appointed to the Audit Committee. Both directors will receive standard non-employee director compensation and in
2026-02-25 — Item 2.02, 9.01 · Earnings · neutral [SEC]
Geron Corporation issued a routine press release on February 25, 2026 announcing its financial results for Q4 and full year 2025, along with recent business highlights. This is a standard quarterly earnings disclosure with no indication of material surprises, regulatory milestone

Recent Insider Filings

2026-07-01 — Spiegel Robert J. (Insider)
2026-05-26 — Spiegel Robert J. (Insider)
2026-05-26 — O'Farrell Elizabeth G. (Insider)
2026-05-26 — Molineaux Susan (Insider)
2026-05-26 — McDonald John F (Insider)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in GERN insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

GERN Insider Trading — FAQ

What is the latest insider trade for GERN?: GERON CORP (GERN) had 6 insider filings in the last 90 days, with the most recent on 2026-07-01. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying GERN stock?: 0 insider purchases of GERN were filed in the last 90 days.
How many insiders are selling GERN stock?: 0 insider sales of GERN were filed in the last 90 days.
Where can I see GERN SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every GERN SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

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