Robert J. Spiegel serves as Executive at GERON CORP, where they oversee executive responsibilities. Since joining the company, Robert J. Spiegel has executed 87 insider transactions totaling $1.3M, demonstrating a bearish approach to their equity position. Their most recent transaction on Sep 30, 2025 involved receiving (via award) 5,702 shares valued at $7.8K.
Robert J. Spiegel currently holds 188,546 shares of GERON CORP (GERN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Robert J. Spiegel has been a net seller of GERN stock. They have purchased $33.0K and sold $1.3M worth of shares.
Robert J. Spiegel's most recent insider trade was on Sep 30, 2025, when they sold 5,702 shares at $1.37 per share.
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| $1.41 |
| Discretionary |
| Jun 28, 2024 | GERN | $0 | Award | 1,916 | $N/A | Discretionary |
| Mar 29, 2024 | GERN | $0 | Award | 2,462 | $N/A | Discretionary |
| Jan 26, 2024 | RNXT | $0 | Purchase | 40,983 | $N/A | Discretionary |
| Dec 29, 2023 | GERN | $0 | Award | 3,406 | $N/A | Discretionary |
| Sep 29, 2023 | GERN | $0 | Award | 3,390 | $N/A | Discretionary |
| Jun 30, 2023 | CYCC | $0 | Award | 21,219 | $N/A | Discretionary |
| Jun 30, 2023 | GERN | $0 | Award | 2,239 | $N/A | Discretionary |
| Apr 21, 2023 | ATNX | $3.0K | Award | 2,300 | $1.31 | Discretionary |
| Mar 31, 2023 | GERN | $0 | Award | 3,312 | $N/A | Discretionary |
| Jan 13, 2023 | ATNX | $3.1K | Award | 16,130 | $0.19 | Discretionary |
| Dec 30, 2022 | GERN | $0 | Award | 2,970 | $N/A | Discretionary |
| Oct 7, 2022 | ATNX | $3.0K | Award | 12,453 | $0.24 | Discretionary |
| Sep 30, 2022 | GERN | $0 | Award | 3,071 | $N/A | Discretionary |
| Aug 3, 2022 | ATNX | $0 | Option Exercise | 8,750 | $N/A | Discretionary |
| Jul 20, 2022 | ATNX | $3.0K | Award | 4,508 | $0.67 | Discretionary |
| Jun 30, 2022 | GERN | $0 | Award | 4,637 | $N/A | Discretionary |
| Jun 14, 2022 | CYCC | $0 | Award | 15,822 | $N/A | Discretionary |
| Apr 8, 2022 | ATNX | $3.0K | Award | 3,989 | $0.75 | Discretionary |
| Mar 31, 2022 | GERN | $0 | Award | 5,284 | $N/A | Discretionary |
| Dec 31, 2021 | GERN | $0 | Award | 5,891 | $N/A | Discretionary |
| Sep 30, 2021 | GERN | $0 | Award | 5,246 | $N/A | Discretionary |
| Jun 30, 2021 | GERN | $0 | Award | 5,097 | $N/A | Discretionary |
| Jun 15, 2021 | CYCC | $0 | Award | 2,374 | $N/A | Discretionary |
| Mar 31, 2021 | GERN | $0 | Award | 4,549 | $N/A | Discretionary |
| Dec 31, 2020 | GERN | $0 | Award | 4,520 | $N/A | Discretionary |
| Sep 30, 2020 | GERN | $0 | Award | 4,130 | $N/A | Discretionary |
| Jun 30, 2020 | GERN | $0 | Award | 3,297 | $N/A | Discretionary |
| Mar 31, 2020 | GERN | $0 | Award | 6,039 | $N/A | Discretionary |