GERON CORP (GERN)

Latest Insider Confidence Score

2026Q1

50.0
Bullish

Company insider confidence (by quarter)

2009Q2 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
ElNawawi Ahmed — 3,000,000 Oct 20, 2025
Okarma Thomas CEO 774,560 Jul 13, 2010
Scarlett John A CEO 600,000 Jun 5, 2024
Earp David SVP, Corp Transactions 467,406 Jun 1, 2012
Grethlein Andrew J COO 452,804 Jul 10, 2024

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Feb 17, 2026 Feb 19, 2026 Eid Joseph EVP, R&D; Chief Medical Office Neutral 52.5 - 0.00% ✗ -
Feb 18, 2026 Feb 19, 2026 ROBERTSON MICHELLE CFO Sell 46.3 -9,855 -35.84% ✗ $19.1K
Dec 31, 2025 Jan 5, 2026 Spiegel Robert J. Director Neutral 82.5 +5,918 3.14% ✗ -
Oct 20, 2025 Oct 20, 2025 ElNawawi Ahmed EVP, Chief Commercial Officer Neutral 52.5 - 0.00% ✗ -
Oct 20, 2025 ElNawawi Ahmed EVP, Chief Commercial Officer Neutral 52.5 - 0.00% ✗ -
Sep 30, 2025 Oct 1, 2025 Spiegel Robert J. Director Neutral 82.5 +5,702 3.12% ✗ -
Aug 7, 2025 Aug 8, 2025 Semerjian Harout CEO Neutral 52.5 - 0.00% ✗ -
Aug 8, 2025 Semerjian Harout CEO Neutral 52.5 - 0.00% ✗ -
Jun 30, 2025 Jul 1, 2025 Spiegel Robert J. Director Neutral 82.5 +5,540 3.12% ✗ -
May 21, 2025 May 22, 2025 Aggarwal Gaurav Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 22, 2025 Bir Dawn Carter CEO Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 22, 2025 LAWLIS V BRYAN Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 22, 2025 McDonald John F Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 22, 2025 Molineaux Susan Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 22, 2025 O'Farrell Elizabeth G. Director Neutral 52.5 - 0.00% ✗ -
May 21, 2025 May 22, 2025 Spiegel Robert J. Director Neutral 52.5 - 0.00% ✗ -
May 9, 2025 May 13, 2025 LAWLIS V BRYAN Director Buy 91.3 +13,300 100.00% ✗ $15.7K
Mar 31, 2025 Apr 2, 2025 Spiegel Robert J. Director Neutral 82.5 +4,913 2.85% ✗ -
Feb 27, 2025 Mar 3, 2025 Samuels Scott Alan EVP, Chief Legal Officer Buy 91.3 +15,000 128.40% ✗ $24.2K
Feb 27, 2025 Mar 3, 2025 SCARLETT JOHN A CEO Buy 91.3 +12,500 10.00% ✗ $22.1K
Feb 27, 2025 Mar 3, 2025 Ziegler James EVP, Chief Commercial Officer Buy 95.0 +100,000 100.00% ✗ $160K
Feb 18, 2025 Feb 20, 2025 SCARLETT JOHN A CEO Neutral 52.5 - 0.00% ✗ -
Feb 18, 2025 Feb 20, 2025 Samuels Scott Alan EVP, Chief Legal Officer Neutral 52.5 - 0.00% ✗ -
Feb 18, 2025 Feb 20, 2025 Ziegler James EVP, Chief Commercial Officer Neutral 52.5 - 0.00% ✗ -
Feb 18, 2025 Feb 20, 2025 GRETHLEIN ANDREW J COO Neutral 52.5 - 0.00% ✗ -
Feb 18, 2025 Feb 20, 2025 ROBERTSON MICHELLE CFO Neutral 52.5 - 0.00% ✗ -
Dec 31, 2024 Jan 2, 2025 Spiegel Robert J. Director Neutral 27.5 -2,206 -1.26% ✗ -
Nov 12, 2024 Eid Joseph EVP, Research and Development Neutral 52.5 - 0.00% ✗ -
Nov 11, 2024 Nov 12, 2024 Eid Joseph EVP, Research and Development Neutral 52.5 - 0.00% ✗ -
Sep 30, 2024 Oct 1, 2024 Spiegel Robert J. Director Neutral 27.5 -1,767 -1.03% ✗ -
Sep 9, 2024 Ziegler James EVP, Chief Commercial Officer Neutral 52.5 - 0.00% ✗ -
Sep 9, 2024 Sep 9, 2024 Ziegler James EVP, Chief Commercial Officer Neutral 52.5 - 0.00% ✗ -
Jul 8, 2024 Jul 10, 2024 GRETHLEIN ANDREW J COO Sell 17.5 -674,348 -100.00% ✗ $3.1M
Mar 29, 2024 Jun 28, 2024 Spiegel Robert J. Director Neutral 27.5 -4,378 -1.29% ✗ -
Jun 10, 2024 Jun 12, 2024 Feller Faye EVP, Chief Medical Officer Sell 17.5 -287,900 -100.00% ✗ $1.3M
Jun 10, 2024 Jun 12, 2024 Kapur Anil EVP, Corp Strategy & CCO Sell 17.5 -421,875 -100.00% ✗ $2M
Jun 6, 2024 Jun 7, 2024 Kapur Anil EVP, Corp Strategy & CCO Neutral 52.5 - 0.00% ✗ -
Jun 6, 2024 Jun 7, 2024 Feller Faye EVP, Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Jun 6, 2024 Jun 7, 2024 SCARLETT JOHN A CEO Neutral 52.5 - 0.00% ✗ -
Jun 6, 2024 Jun 7, 2024 Samuels Scott Alan EVP, Chief Legal Officer Neutral 52.5 - 0.00% ✗ -
Jun 6, 2024 Jun 7, 2024 GRETHLEIN ANDREW J COO Neutral 52.5 - 0.00% ✗ -
Jun 6, 2024 Jun 7, 2024 ROBERTSON MICHELLE CFO Neutral 52.5 - 0.00% ✗ -
Jun 4, 2024 Jun 5, 2024 SCARLETT JOHN A CEO Sell 5.0 -600,000 -50.00% ✓ $2.4M
May 15, 2024 May 17, 2024 LAWLIS V BRYAN Director Sell 10.0 -35,000 -100.00% ✓ $131.3K
May 9, 2024 May 10, 2024 McDonald John F Director Neutral 52.5 - 0.00% ✗ -
May 9, 2024 May 10, 2024 Bir Dawn Carter Director Neutral 52.5 - 0.00% ✗ -
May 9, 2024 May 10, 2024 Aggarwal Gaurav Director Neutral 52.5 - 0.00% ✗ -
May 9, 2024 May 10, 2024 Spiegel Robert J. Director Neutral 52.5 - 0.00% ✗ -
May 9, 2024 May 10, 2024 Molineaux Susan Director Neutral 52.5 - 0.00% ✗ -
May 9, 2024 May 10, 2024 LAWLIS V BRYAN Director Neutral 52.5 - 0.00% ✗ -
May 9, 2024 May 10, 2024 O'Farrell Elizabeth G. Director Neutral 52.5 - 0.00% ✗ -
Feb 14, 2024 Feb 16, 2024 Feller Faye EVP, CHIEF MEDICAL OFFICER Neutral 52.5 - 0.00% ✗ -
Feb 14, 2024 Feb 16, 2024 Kapur Anil EVP, CORP STRATEGY & CCO Neutral 52.5 - 0.00% ✗ -
Feb 14, 2024 Feb 16, 2024 Samuels Scott Alan EVP & CHIEF LEGAL OFFICER Neutral 52.5 - 0.00% ✗ -
Feb 14, 2024 Feb 16, 2024 ROBERTSON MICHELLE CFO Neutral 52.5 - 0.00% ✗ -
Feb 14, 2024 Feb 16, 2024 GRETHLEIN ANDREW J COO Neutral 52.5 - 0.00% ✗ -
Feb 14, 2024 Feb 16, 2024 SCARLETT JOHN A CEO Neutral 52.5 - 0.00% ✗ -
Dec 29, 2023 Jan 3, 2024 Spiegel Robert J. Director Neutral 77.5 +3,406 2.12% ✗ -
Dec 29, 2023 Jan 3, 2024 Molineaux Susan Director Neutral 85.0 +6,220 5.00% ✗ -
Dec 29, 2023 Jan 3, 2024 Aggarwal Gaurav Director Neutral 90.0 +1,970 100.00% ✗ -
Nov 26, 2023 Nov 28, 2023 Aggarwal Gaurav Director Neutral 52.5 - 0.00% ✗ -
Nov 28, 2023 Aggarwal Gaurav Director Neutral 52.5 - 0.00% ✗ -
Sep 29, 2023 Oct 2, 2023 Molineaux Susan Director Neutral 85.0 +6,191 5.24% ✗ -
Sep 29, 2023 Oct 2, 2023 Spiegel Robert J. Director Neutral 77.5 +3,390 2.16% ✗ -
Sep 27, 2023 Samuels Scott Alan EVP, Chief Legal Officer Neutral 52.5 - 0.00% ✗ -
Sep 25, 2023 Sep 27, 2023 ROBERTSON MICHELLE CFO Neutral 52.5 - 0.00% ✗ -
Sep 27, 2023 ROBERTSON MICHELLE CFO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2023 Sep 21, 2023 SCARLETT JOHN A CEO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2023 Sep 21, 2023 GRETHLEIN ANDREW J COO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2023 Sep 21, 2023 Feller Faye EVP, Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Aug 15, 2023 Sep 21, 2023 Bloom Olivia Kyusuk CFO Neutral 52.5 - 0.00% ✗ -
Aug 24, 2023 Aug 24, 2023 O'Farrell Elizabeth G. Director Buy 91.3 +13,186 64.51% ✗ $30.1K
Aug 1, 2023 Aug 3, 2023 Samuels Scott Alan EVP, Chief Legal Officer Neutral 52.5 - 0.00% ✗ -
Aug 3, 2023 Samuels Scott Alan EVP, Chief Legal Officer Neutral 52.5 - 0.00% ✗ -
Jun 30, 2023 Jun 30, 2023 Molineaux Susan Director Neutral 82.5 +4,088 3.59% ✗ -
Jun 30, 2023 Jun 30, 2023 Spiegel Robert J. Director Neutral 77.5 +2,239 1.44% ✗ -
Jun 30, 2023 Jun 30, 2023 Kapur Anil EVP, Corp Strategy & CCO Neutral 90.0 +7,567 14.22% ✗ -
May 31, 2023 Jun 2, 2023 Bir Dawn Carter Director Neutral 52.5 - 0.00% ✗ -
May 31, 2023 Jun 2, 2023 Spiegel Robert J. Director Neutral 52.5 - 0.00% ✗ -
May 31, 2023 Jun 2, 2023 O'Farrell Elizabeth G. Director Neutral 52.5 - 0.00% ✗ -
May 31, 2023 Jun 2, 2023 Molineaux Susan Director Neutral 52.5 - 0.00% ✗ -
May 31, 2023 Jun 2, 2023 McDonald John F Director Neutral 52.5 - 0.00% ✗ -
May 31, 2023 Jun 2, 2023 LAWLIS V BRYAN Director Neutral 52.5 - 0.00% ✗ -
May 11, 2023 May 11, 2023 LAWLIS V BRYAN Director Sell 10.0 -35,000 -100.00% ✓ $105K
May 1, 2023 May 1, 2023 Molineaux Susan Director Sell 10.0 -35,000 -100.00% ✓ $86.8K
Mar 31, 2023 Apr 3, 2023 Molineaux Susan Director Neutral 85.0 +6,048 5.60% ✗ -
Mar 31, 2023 Apr 3, 2023 Spiegel Robert J. Director Neutral 77.5 +3,312 2.18% ✗ -
Feb 22, 2023 Feb 24, 2023 Kapur Anil EVP, Corp Strategy & CCO Neutral 52.5 - 0.00% ✗ -
Feb 22, 2023 Feb 24, 2023 GRETHLEIN ANDREW J COO Neutral 52.5 - 0.00% ✗ -
Feb 22, 2023 Feb 24, 2023 Feller Faye EVP, Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Feb 22, 2023 Feb 24, 2023 Bloom Olivia Kyusuk CFO Neutral 52.5 - 0.00% ✗ -
Feb 22, 2023 Feb 24, 2023 SCARLETT JOHN A CEO Neutral 52.5 - 0.00% ✗ -
Feb 9, 2023 Feb 10, 2023 GRETHLEIN ANDREW J COO Sell 5.0 -384,719 -100.00% ✓ $1.2M
Feb 8, 2023 Feb 10, 2023 Bloom Olivia Kyusuk CFO Sell 5.0 -400,000 -84.28% ✓ $1.2M
Feb 8, 2023 Feb 10, 2023 SCARLETT JOHN A CEO Sell 5.0 -1,340,000 -100.00% ✓ $4.1M
Jan 13, 2023 Jan 17, 2023 EASTHAM KARIN Director Neutral 52.5 - 0.00% ✗ -
Dec 30, 2022 Jan 3, 2023 Kapur Anil EVP, Corp Strategy & CCO Neutral 90.0 +6,021 12.76% ✗ -
Dec 30, 2022 Jan 3, 2023 Spiegel Robert J. Director Neutral 77.5 +2,970 2.00% ✗ -
Sep 30, 2022 Oct 3, 2022 Spiegel Robert J. Director Neutral 77.5 +3,071 2.11% ✗ -
Sep 12, 2022 Sep 14, 2022 GRETHLEIN ANDREW J COO Neutral 52.5 - 0.00% ✗ -