GERN
Geron Corporation
NASDAQ: GERN · HEALTHCARE · BIOTECHNOLOGY
$1.54
+1.99% today
Updated 2026-04-30
Market cap
$980.58M
P/E ratio
—
P/S ratio
5.33x
EPS (TTM)
$-0.13
Dividend yield
—
52W range
$1 – $2
Volume
19.1M
Geron Corporation (GERN) Insider transactions
Net insider activity
Net buying (39,509,539 shares)
Buy transactions
84
Sell transactions
16
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-13 | WILLIAMS, TIMOTHY | EVP and Chief Legal Officer | Buy | 2,500,000 | — | — |
| 2026-03-31 | SPIEGEL, ROBERT J. | Director | Buy | 5,243 | $1.49 | $7812.07 |
| 2026-03-25 | CHINOPOROS, CONSTANTINE | Director | Buy | 270,000 | — | — |
| 2026-03-25 | ANDREWS, PATRICIA S | Director | Buy | 270,000 | — | — |
| 2026-02-18 | ROBERTSON, MICHELLE | EVP, CHIEF FINANCIAL OFFICER | Sale | 27,500 | — | — |
| 2026-02-18 | ROBERTSON, MICHELLE | EVP, CHIEF FINANCIAL OFFICER | Buy | 27,500 | — | — |
| 2026-02-18 | ROBERTSON, MICHELLE | EVP, CHIEF FINANCIAL OFFICER | Sale | 9,855 | $1.94 | $19118.70 |
| 2026-02-17 | ROBERTSON, MICHELLE | EVP, CHIEF FINANCIAL OFFICER | Buy | 1,660,000 | — | — |
| 2026-02-17 | EID, JOSEPH | EVP, R&D; Chief Medical Office | Buy | 2,220,000 | — | — |
| 2025-12-31 | SPIEGEL, ROBERT J. | Director | Buy | 5,918 | $1.32 | $7811.76 |
| 2025-10-20 | ELNAWAWI, AHMED | EVP, Chief Commercial Officer | Buy | 3,000,000 | — | — |
| 2025-09-30 | SPIEGEL, ROBERT J. | Director | Buy | 5,702 | $1.37 | $7811.74 |
| 2025-08-07 | SEMERJIAN, HAROUT | Director, President and CEO | Buy | 7,000,000 | — | — |
| 2025-08-07 | SEMERJIAN, HAROUT | Director, President and CEO | Buy | 4,000,000 | — | — |
| 2025-06-30 | SPIEGEL, ROBERT J. | Director | Buy | 5,540 | $1.41 | $7811.40 |
| 2025-05-21 | SPIEGEL, ROBERT J. | Director | Buy | 180,000 | — | — |
| 2025-05-21 | O'FARRELL, ELIZABETH G. | Director | Buy | 180,000 | — | — |
| 2025-05-21 | MOLINEAUX, SUSAN | Director | Buy | 180,000 | — | — |
| 2025-05-21 | MCDONALD, JOHN F | Director | Buy | 180,000 | — | — |
| 2025-05-21 | LAWLIS, V BRYAN | Director | Buy | 180,000 | — | — |
| 2025-05-21 | BIR, DAWN CARTER | Director, Interim President and CEO | Buy | 180,000 | — | — |
| 2025-05-21 | AGGARWAL, GAURAV | Director | Buy | 180,000 | — | — |
| 2025-05-09 | LAWLIS, V BRYAN | Director | Buy | 13,300 | $1.18 | $15667.40 |
| 2025-03-31 | SPIEGEL, ROBERT J. | Director | Buy | 4,913 | $1.59 | $7811.67 |
| 2025-02-27 | ZIEGLER, JAMES | EVP, Chief Commercial Officer | Buy | 100,000 | $1.60 | $160000.00 |
| 2025-02-27 | SCARLETT, JOHN A | Director, Chairman, President and CEO | Buy | 12,500 | $1.77 | $22062.50 |
| 2025-02-27 | SAMUELS, SCOTT ALAN | EVP, Chief Legal Officer | Buy | 15,000 | $1.61 | $24150.00 |
| 2025-02-18 | ZIEGLER, JAMES | EVP, Chief Commercial Officer | Buy | 529,000 | — | — |
| 2025-02-18 | ZIEGLER, JAMES | EVP, Chief Commercial Officer | Buy | 89,000 | — | — |
| 2025-02-18 | SCARLETT, JOHN A | Director, Chairman, President and CEO | Buy | 2,457,000 | — | — |
| 2025-02-18 | SCARLETT, JOHN A | Director, Chairman, President and CEO | Buy | 410,000 | — | — |
| 2025-02-18 | SAMUELS, SCOTT ALAN | EVP, Chief Legal Officer | Buy | 621,000 | — | — |
| 2025-02-18 | SAMUELS, SCOTT ALAN | EVP, Chief Legal Officer | Buy | 104,000 | — | — |
| 2025-02-18 | ROBERTSON, MICHELLE | EVP, Chief Financial Officer | Buy | 656,000 | — | — |
| 2025-02-18 | ROBERTSON, MICHELLE | EVP, Chief Financial Officer | Buy | 110,000 | — | — |
| 2025-02-18 | GRETHLEIN, ANDREW J | EVP, Chief Operating Officer | Buy | 839,000 | — | — |
| 2025-02-18 | GRETHLEIN, ANDREW J | EVP, Chief Operating Officer | Buy | 140,000 | — | — |
| 2024-12-31 | SPIEGEL, ROBERT J. | Director | Sale | 2,206 | — | — |
| 2024-11-11 | EID, JOSEPH | EVP, Research and Development | Sale | 2,500,000 | — | — |
| 2024-09-30 | SPIEGEL, ROBERT J. | Director | Sale | 1,767 | — | — |
| 2024-09-09 | ZIEGLER, JAMES | EVP, Chief Commercial Officer | Sale | 1,600,000 | — | — |
| 2024-07-08 | GRETHLEIN, ANDREW J | EVP, Chief Operating Officer | Sale | 452,804 | — | — |
| 2024-07-08 | GRETHLEIN, ANDREW J | EVP, Chief Operating Officer | Sale | 221,544 | — | — |
| 2024-07-08 | GRETHLEIN, ANDREW J | EVP, Chief Operating Officer | Buy | 674,348 | $1.72 | $1.16M |
| 2024-06-28 | SPIEGEL, ROBERT J. | Director | Sale | 1,916 | — | — |
| 2024-06-10 | KAPUR, ANIL | EVP, Corp Strategy & CCO | Sale | 421,875 | — | — |
| 2024-06-10 | KAPUR, ANIL | EVP, Corp Strategy & CCO | Buy | 421,875 | $1.06 | $447187.50 |
| 2024-06-10 | FELLER, FAYE | EVP, Chief Medical Officer | Sale | 155,400 | — | — |
| 2024-06-10 | FELLER, FAYE | EVP, Chief Medical Officer | Sale | 112,500 | — | — |
| 2024-06-10 | FELLER, FAYE | EVP, Chief Medical Officer | Sale | 20,000 | — | — |
| 2024-06-10 | FELLER, FAYE | EVP, Chief Medical Officer | Sale | 287,900 | $4.63 | $1.33M |
| 2024-06-10 | FELLER, FAYE | EVP, Chief Medical Officer | Buy | 155,400 | $1.30 | $201243.00 |
| 2024-06-10 | FELLER, FAYE | EVP, Chief Medical Officer | Buy | 112,500 | $1.06 | $119250.00 |
| 2024-06-10 | FELLER, FAYE | EVP, Chief Medical Officer | Buy | 20,000 | $1.06 | $21200.00 |
| 2024-06-06 | SCARLETT, JOHN A | Director, Chairman, President and CEO | Buy | 1,000,000 | — | — |
| 2024-06-06 | SAMUELS, SCOTT ALAN | EVP, Chief Legal Officer | Buy | 250,000 | — | — |
| 2024-06-06 | ROBERTSON, MICHELLE | EVP, Chief Financial Officer | Buy | 250,000 | — | — |
| 2024-06-06 | KAPUR, ANIL | EVP, Corp Strategy & CCO | Buy | 250,000 | — | — |
| 2024-06-06 | GRETHLEIN, ANDREW J | EVP, Chief Operating Officer | Buy | 452,804 | — | — |
| 2024-06-06 | FELLER, FAYE | EVP, Chief Medical Officer | Buy | 200,000 | — | — |
| 2024-06-06 | FELLER, FAYE | EVP, Chief Medical Officer | Buy | 50,000 | — | — |
| 2024-06-04 | SCARLETT, JOHN A | Director, Chairman, President and CEO | Sale | 600,000 | — | — |
| 2024-06-04 | SCARLETT, JOHN A | Director, Chairman, President and CEO | Buy | 600,000 | $2.54 | $1.52M |
| 2024-05-15 | LAWLIS, V BRYAN | Director | Sale | 35,000 | — | — |
| 2024-05-15 | LAWLIS, V BRYAN | Director | Buy | 35,000 | $1.94 | $67900.00 |
| 2024-05-09 | SPIEGEL, ROBERT J. | Director | Buy | 180,000 | — | — |
| 2024-05-09 | O'FARRELL, ELIZABETH G. | Director | Buy | 180,000 | — | — |
| 2024-05-09 | MOLINEAUX, SUSAN | Director | Buy | 180,000 | — | — |
| 2024-05-09 | MCDONALD, JOHN F | Director | Buy | 180,000 | — | — |
| 2024-05-09 | LAWLIS, V BRYAN | Director | Buy | 180,000 | — | — |
| 2024-05-09 | BIR, DAWN CARTER | Director | Buy | 180,000 | — | — |
| 2024-05-09 | AGGARWAL, GAURAV | Director | Buy | 180,000 | — | — |
| 2024-03-29 | SPIEGEL, ROBERT J. | Director | Buy | 2,462 | $3.30 | $8124.60 |
| 2024-02-14 | SCARLETT, JOHN A | Director, CHAIRMAN, PRESIDENT AND CEO | Buy | 3,000,000 | — | — |
| 2024-02-14 | SAMUELS, SCOTT ALAN | EVP & CHIEF LEGAL OFFICER | Buy | 850,000 | — | — |
| 2024-02-14 | ROBERTSON, MICHELLE | EVP, CHIEF FINANCIAL OFFICER | Buy | 850,000 | — | — |
| 2024-02-14 | KAPUR, ANIL | EVP, CORP STRATEGY & CCO | Buy | 750,000 | — | — |
| 2024-02-14 | GRETHLEIN, ANDREW J | EVP, CHIEF OPERATING OFFICER | Buy | 1,200,000 | — | — |
| 2024-02-14 | FELLER, FAYE | EVP, CHIEF MEDICAL OFFICER | Buy | 750,000 | — | — |
| 2023-12-29 | SPIEGEL, ROBERT J. | Director | Buy | 3,406 | — | — |
| 2023-12-29 | MOLINEAUX, SUSAN | Director | Buy | 6,220 | — | — |
| 2023-12-29 | AGGARWAL, GAURAV | Director | Buy | 1,970 | — | — |
| 2023-11-26 | AGGARWAL, GAURAV | Director | Buy | 200,000 | — | — |
| 2023-09-29 | SPIEGEL, ROBERT J. | Director | Buy | 3,390 | — | — |
| 2023-09-29 | MOLINEAUX, SUSAN | Director | Buy | 6,191 | — | — |
| 2023-09-25 | ROBERTSON, MICHELLE | EVP, Chief Financial Officer | Buy | 1,350,000 | — | — |
| 2023-08-24 | O'FARRELL, ELIZABETH G. | Director | Buy | 6,607 | $2.28 | $15063.96 |
| 2023-08-24 | O'FARRELL, ELIZABETH G. | Director | Buy | 6,579 | $2.28 | $15000.12 |
| 2023-08-15 | SCARLETT, JOHN A | Director, Chairman, President and CEO | Buy | 500,000 | — | — |
| 2023-08-15 | GRETHLEIN, ANDREW J | EVP, Chief Operating Officer | Buy | 221,544 | — | — |
| 2023-08-15 | FELLER, FAYE | EVP, Chief Medical Officer | Buy | 180,000 | — | — |
| 2023-08-15 | FELLER, FAYE | EVP, Chief Medical Officer | Buy | 20,000 | — | — |
| 2023-08-15 | BLOOM, OLIVIA KYUSUK | EVP, Chief Financial Officer | Buy | 250,000 | — | — |
| 2023-08-01 | SAMUELS, SCOTT ALAN | EVP, Chief Legal Officer | Buy | 1,350,000 | — | — |
| 2023-06-30 | SPIEGEL, ROBERT J. | Director | Buy | 2,239 | — | — |
| 2023-06-30 | MOLINEAUX, SUSAN | Director | Buy | 4,088 | — | — |
| 2023-06-30 | KAPUR, ANIL | EVP, Corp Strategy & CCO | Buy | 7,567 | $2.04 | $15436.68 |
| 2023-05-31 | SPIEGEL, ROBERT J. | Director | Buy | 125,000 | — | — |
| 2023-05-31 | O'FARRELL, ELIZABETH G. | Director | Buy | 125,000 | — | — |
| 2023-05-31 | MOLINEAUX, SUSAN | Director | Buy | 125,000 | — | — |