Geron Corp (GERN) Insider Ownership

Historic Ownership Trends

There are no significant Insider Shareholders in Geron as of December 12, 2025.

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Robert J. Spiegel 188,546 01 Oct, 2025
Susan Molineaux 130,527 01 May, 2023
Karin Eastham 109,047 17 Jan, 2023
James Ziegler EVP And Chief Commercial Officer 100,000 03 Mar, 2025
Olivia Kyusuk Bloom EVP And Chief Financial Officer 74,588 10 Feb, 2023
Elizabeth G. O'Farrell 33,627 24 Aug, 2023
Scott Alan Samuels EVP And Chief Legal Officer 26,682 03 Mar, 2025
V Bryan Lawlis 13,300 13 May, 2025
John A Scarlett Chairman And President And CEO 12,500 03 Mar, 2025
Gaurav Aggarwal 1,970 03 Jan, 2024

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
30 Sep, 2025 Robert J. Spiegel Common Stock A 5,702 $1.37 188,546 D A
30 Jun, 2025 Robert J. Spiegel Common Stock A 5,540 $1.41 182,844 D A
09 May, 2025 V Bryan Lawlis - - 13,300 D
09 May, 2025 V Bryan Lawlis Common Stock A 13,300 $1.18 13,300 D P
31 Mar, 2025 Robert J. Spiegel Common Stock A 4,913 $1.59 177,304 D A
27 Feb, 2025 James Ziegler Common Stock A 100,000 $1.60 100,000 D P
27 Feb, 2025 John A Scarlett Common Stock A 12,500 $1.76 12,500 D P
27 Feb, 2025 Scott Alan Samuels Common Stock A 15,000 $1.61 26,682 D P
27 Feb, 2025 John A Scarlett - - 12,500 D
31 Dec, 2024 Robert J. Spiegel Common Stock D 2,206 $0.00 172,391 D A
30 Sep, 2024 Robert J. Spiegel Common Stock D 1,767 $0.00 170,185 D A
08 Jul, 2024 Andrew J Grethlein - - 674,348 D
08 Jul, 2024 Andrew J Grethlein Common Stock A 674,348 $1.72 674,348 D M
08 Jul, 2024 Andrew J Grethlein - - 0 D
08 Jul, 2024 Andrew J Grethlein Common Stock D 674,348 $4.56 0 D S
10 Jun, 2024 Anil Kapur Common Stock A 421,875 $1.06 421,875 D M
10 Jun, 2024 Faye Feller - - 112,500 D
10 Jun, 2024 Faye Feller Common Stock A 112,500 $1.06 112,500 D M
10 Jun, 2024 Anil Kapur Common Stock D 421,875 $4.64 0 D S
10 Jun, 2024 Faye Feller Common Stock A 20,000 $1.06 20,000 D M