Geron (NASDAQ: GERN) insider transactions
In the twelve months to 10 November 2026, executives and directors of Geron reported 1 open-market sale of 9,855 shares ($19,119) and 0 open-market purchases, by 1 person, according to the Form 4 filings they submitted to the SEC.
Latest transactions
| Date | Insider | Role | Transaction | Shares | Price | Held after | Filing |
|---|---|---|---|---|---|---|---|
| 30 September 2026 | Spiegel Robert J. | Director | Grant or award | +6,351 | $1.23 | 212,161 | Form 4 |
| 30 June 2026 | Spiegel Robert J. | Director | Grant or award | +6,103 | $1.28 | 205,810 | Form 4 |
| 31 March 2026 | Spiegel Robert J. | Director | Grant or award | +5,243 | $1.49 | 199,707 | Form 4 |
| 18 February 2026 | Robertson Michelle | EVP, Chief Financial Officer | Option exercise | +27,500 | — | 27,500 | Form 4 |
| 18 February 2026 | Robertson Michelle | EVP, Chief Financial Officer | Open-market sale | −9,855 | $1.94 | 17,645 | Form 4 |
| 31 December 2025 | Spiegel Robert J. | Director | Grant or award | +5,918 | $1.32 | 194,464 | Form 4 |
| 30 September 2025 | Spiegel Robert J. | Director | Grant or award | +5,702 | $1.37 | 188,546 | Form 4 |
| 30 June 2025 | Spiegel Robert J. | Director | Grant or award | +5,540 | $1.41 | 182,844 | Form 4 |
| 9 May 2025 | Lawlis V Bryan | Director | Open-market purchase | +13,300 | $1.18 | 13,300 | Form 4 |
| 31 March 2025 | Spiegel Robert J. | Director | Grant or award | +4,913 | $1.59 | 177,304 | Form 4 |
| 27 February 2025 | Ziegler James | EVP, Chief Commercial Officer | Open-market purchase | +100,000 | $1.60 | 100,000 | Form 4 |
| 27 February 2025 | Scarlett John A | Chairman, President and CEO | Open-market purchase | +12,500 | $1.77 | 12,500 | Form 4 |
| 27 February 2025 | Samuels Scott Alan | EVP, Chief Legal Officer | Open-market purchase | +15,000 | $1.61 | 26,682 | Form 4 |
| 31 December 2024 | Spiegel Robert J. | Director | Grant or award | −2,206 | — | 172,391 | Form 4 |
| 30 September 2024 | Spiegel Robert J. | Director | Grant or award | −1,767 | — | 170,185 | Form 4 |
Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.
How to read the table
Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.
Where each row comes from
From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Geron page; the method, in data sources.
Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.