Spiegel Robert J. - Insider Non-Derivative Transactions at GERON CORP (GERN) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Sep 30, 2025, Spiegel Robert J.'s relationship to GERON CORP (GERN) is Director, and currently has 188,546 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other GERN insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Spiegel Robert J. - Insider Non-Derivative Transactions of GERN Common Stock

Spiegel Robert J. - Insider Non-Derivative Transactions at GERN

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Oct 1, 2025	Acquisition -- (Common Stock)	5702	1.37	188546
Jul 1, 2025	Acquisition -- (Common Stock)	5540	1.41	182844
Apr 1, 2025	Acquisition -- (Common Stock)	4913	1.59	177304
Jan 1, 2025	Acquisition -- (Common Stock)	2206	0	172391
Jan 1, 2025	Acquisition -- (Common Stock)	2206	3.54	172391
Oct 1, 2024	Acquisition -- (Common Stock)	1767	0	170185
Oct 1, 2024	Acquisition -- (Common Stock)	1767	4.54	170185
Jun 29, 2024	Acquisition -- (Common Stock)	1916	0	168418
Jun 29, 2024	Acquisition -- (Common Stock)	1916	4.24	168418
Mar 30, 2024	Acquisition -- (Common Stock)	2462	0	166502
Mar 30, 2024	Acquisition -- (Common Stock)	2462	3.3	166502
Dec 30, 2023	Acquisition -- (Common Stock)	3406	0	164040
Sep 30, 2023	Acquisition -- (Common Stock)	3390	0	160634
Jul 1, 2023	Acquisition -- (Common Stock)	2239	0	157244
Apr 1, 2023	Acquisition -- (Common Stock)	3312	0	155005
Dec 31, 2022	Acquisition -- (Common Stock)	2970	0	151693