Geron Corporation
Ownership
Ownership Structure
Who owns Geron Corporation (GERN)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 86.6% of the shares are freely tradable; institutional investors hold 79.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.64 | 49,115,571 | +3.8 | 06/30/2026 |
| RA Capital Management, LLC | 6.66 | 42,809,751 | -32.9 | 06/30/2026 |
| Soleus Capital Management, L.P. | 6.66 | 42,808,659 | +3.1 | 06/30/2026 |
| State Street Corp | 5.58 | 35,856,671 | +17.6 | 06/30/2026 |
| Citadel Advisors Llc | 4.52 | 29,038,928 | +34.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.24 | 27,250,215 | +2.2 | 06/30/2026 |
| Nantahala Capital Management, LLC | 3.81 | 24,450,000 | +117.8 | 06/30/2026 |
| ClearBridge Advisors, LLC | 3.06 | 19,648,853 | +0.1 | 06/30/2026 |
| Eversept Partners, LP | 2.91 | 18,717,422 | -0.6 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 20,449,234 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Spiegel Robert J. | Director | 212,161 | 209,997 $ | Sep 30, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | Spiegel Robert J. | Director | Other | 6,351 | 1.23 | 7,812 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 6, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.