GERON CORP GERN
COM · Common Stock · CUSIP 374163103 · ISIN US3741631036
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($38.7k this quarter). Holder counts are more reliable. Shares outstanding: 642.5m as of 2026-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.28. Options: 7 managers hold calls ($835.3k notional), 5 hold puts ($1.9m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 180 |
| Q4 2022 | 185 |
| Q1 2023 | 191 |
| Q2 2023 | 202 |
| Q3 2023 | 203 |
| Q4 2023 | 203 |
| Q1 2024 | 232 |
| Q2 2024 | 240 |
| Q3 2024 | 256 |
| Q4 2024 | 286 |
| Q1 2025 | 271 |
| Q2 2025 | 260 |
| Q3 2025 | 263 |
| Q4 2025 | 262 |
| Q1 2026 | 256 |
| Q2 2026 | 260 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 129 | 86 |
| Q4 2024 | 142 | 97 |
| Q1 2025 | 144 | 123 |
| Q2 2025 | 123 | 112 |
| Q3 2025 | 104 | 118 |
| Q4 2025 | 89 | 128 |
| Q1 2026 | 117 | 94 |
| Q2 2026 | 130 | 92 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $1.5m | $403.6k | 0.27 |
| Q4 2025 | $1.7m | $1.9m | 1.12 |
| Q1 2026 | $1.3m | $2.4m | 1.79 |
| Q2 2026 | $835.3k | $1.9m | 2.22 |
Biggest buyers
| Nantahala Capital Management, LLC | Added | +13.2m |
| CITADEL ADVISORS LLC | Added | +7.5m |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Added | +6.1m |
| GOLDMAN SACHS GROUP INC | Added | +5.5m |
| STATE STREET CORP | Added | +5.4m |
| TORONTO DOMINION BANK | Added | +4.1m |
| RENAISSANCE TECHNOLOGIES LLC | Added | +2.8m |
| PANAGORA ASSET MANAGEMENT INC | Added | +2.6m |
| ExodusPoint Capital Management, LP | Added | +2.5m |
| TWO SIGMA INVESTMENTS, LP | Added | +2.4m |
Biggest sellers
| Deep Track Capital, LP | Sold out | -31.7m |
| RA CAPITAL MANAGEMENT, L.P. | Reduced | -21.0m |
| Point72 Asset Management, L.P. | Reduced | -16.4m |
| MARSHALL WACE, LLP | Sold out | -3.0m |
| Vestal Point Capital, LP | Sold out | -2.5m |
| DEUTSCHE BANK AG\ | Reduced | -1.8m |
| Nuveen, LLC | Reduced | -1.4m |
| HRT FINANCIAL LP | Sold out | -1.2m |
| FMR LLC | Reduced | -1.1m |
| BANK OF AMERICA CORP /DE/ | Reduced | -1.0m |
Biggest calls
| Verition Fund Management LLC | New | $256.0k200.0k shares |
| JANE STREET GROUP, LLC | Reduced | $246.9k192.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $136.2k106.4k shares |
| CITADEL ADVISORS LLC | Added | $109.6k85.6k shares |
| SIMPLEX TRADING, LLC | Added | $52.6k41.1k shares |
| GROUP ONE TRADING LLC | Reduced | $28.9k22.6k shares |
| Summit Financial Strategies, Inc. | Reduced | $5.1k4.0k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $760.7k594.3k shares |
| CITADEL ADVISORS LLC | Reduced | $549.8k429.5k shares |
| SIMPLEX TRADING, LLC | Reduced | $431.0k336.7k shares |
| GROUP ONE TRADING LLC | Reduced | $65.3k51.0k shares |
| JANE STREET GROUP, LLC | Reduced | $44.3k34.6k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| RA CAPITAL MANAGEMENT, L.P. 13G · passive investor no change · filed 2026-08-14 | 9.9% |
| Soleus Capital Master Fund, L.P. 13G · passive investor +1.3 pts · filed 2026-05-08 | 6.5% |
| STATE STREET CORP 13G · institution new · filed 2026-08-07 | 5.6% |
Fell to 5% or below in the last year: Deep Track Capital, LP (5.0%, 2026-05-15), VANGUARD GROUP INC (0.0%, 2026-03-26)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 3 | $206.3k | 0 | — | — |
| Q2 2025 | 1 | $15.7k | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 1 | $19.1k | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.00% of their portfolio | 49.1m $62.9m | Added +1.8m |
| RA CAPITAL MANAGEMENT, L.P. 0.48% of their portfolio | 42.8m $54.8m | Reduced -21.0m |
| Soleus Capital Management, L.P. 1.89% of their portfolio | 42.8m $54.8m | Added +1.3m |
| STATE STREET CORP 0.00% of their portfolio | 35.9m $45.9m | Added +5.4m |
| CITADEL ADVISORS LLC 0.02% of their portfolio | 29.0m $37.2m | Added +7.5m |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 27.3m $34.9m | Added +581.2k |
| Nantahala Capital Management, LLC 0.95% of their portfolio | 24.4m $31.3m | Added +13.2m |
| Clearbridge Investments, LLC 0.02% of their portfolio | 19.6m $25.2m | Added +28.5k |
| Eversept Partners, LP 1.31% of their portfolio | 18.7m $24.0m | Reduced -117.5k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 16.6m $21.3m | Added +5.5m |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 14.6m $18.6m | Added +885.2k |
| MORGAN STANLEY 0.00% of their portfolio | 12.9m $16.6m | Added +280.3k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 10.8m $13.8m | Added +6.1m |
| Vivo Capital, LLC 1.01% of their portfolio | 8.7m $11.1m | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 8.1m $10.4m | Added +790.7k |
| Kynam Capital Management, LP 0.48% of their portfolio | 6.8m $8.8m | Unchanged |
| Candriam S.C.A. 0.03% of their portfolio | 5.6m $7.1m | Added +1.7m |
| FMR LLC 0.00% of their portfolio | 5.5m $7.0m | Reduced -1.1m |
| Pale Fire Capital SE 0.48% of their portfolio | 5.3m $6.8m | Added +418.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 5.0m $6.4m | Added +169.9k |
| UBS Group AG 0.00% of their portfolio | 4.9m $6.3m | Added +1.2m |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 4.6m $5.9m | Added +2.8m |
| SEGALL BRYANT & HAMILL, LLC 0.07% of their portfolio | 4.5m $5.7m | Reduced -254.5k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 4.3m $5.5m | Added +2.4m |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 4.3m $5.5m | Reduced -198.7k |
| TORONTO DOMINION BANK 0.01% of their portfolio | 4.2m $5.4m | Added +4.1m |
| Point72 Asset Management, L.P. 0.01% of their portfolio | 4.0m $5.2m | Reduced -16.4m |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 4.0m $5.1m | Added +128.4k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 3.5m $4.5m | Reduced -1.0m |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 3.4m $4.4m | Reduced -1.8m |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 3.4m $4.3m | Added +1.9m |
| PANAGORA ASSET MANAGEMENT INC 0.01% of their portfolio | 2.9m $3.8m | Added +2.6m |
| ExodusPoint Capital Management, LP 0.03% of their portfolio | 2.5m $3.2m | Added +2.5m |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 2.4m $3.1m | Added +2.0m |
| EDMOND DE ROTHSCHILD HOLDING S.A. 0.04% of their portfolio | 2.3m $3.0m | Unchanged |
| NAN FUNG TRINITY (HK) LTD 0.28% of their portfolio | 2.2m $2.8m | Added +850.0k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 1.6m $2.1m | Added +78.0k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 1.5m $2.0m | Added +297.2k |
| Nuveen, LLC 0.00% of their portfolio | 1.5m $2.0m | Reduced -1.4m |
| MOORE CAPITAL MANAGEMENT, LP 0.03% of their portfolio | 1.2m $1.5m | New |
| Invesco Ltd. 0.00% of their portfolio | 1.2m $1.5m | Reduced -129.2k |
| Seven Fleet Capital Management LP 0.22% of their portfolio | 1.1m $1.4m | Added +633.0k |
| World Investment Advisors 0.03% of their portfolio | 1.0m $1.5m | Unchanged |
| Virtus Investment Advisers, LLC 0.30% of their portfolio | 1.0m $1.3m | Added +390.4k |
| Voleon Capital Management LP 0.02% of their portfolio | 1.0m $1.3m | Added +882.4k |
| Hennion & Walsh Asset Management, Inc. 0.04% of their portfolio | 1.0m $1.3m | Added +604.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 983.7k $1.3m | Reduced -287.3k |
| Swiss National Bank 0.00% of their portfolio | 964.0k $1.2m | Added +16.5k |
| CITIGROUP INC 0.00% of their portfolio | 826.2k $1.1m | Added +192.7k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 732.1k $937.0k | Added +32.0k |
| J. Goldman & Co LP 0.03% of their portfolio | 712.1k $911.5k | Added +101.5k |
| Man Group plc 0.00% of their portfolio | 696.7k $891.7k | Added +299.8k |
| SummitTX Capital, L.P. 0.02% of their portfolio | 657.0k $841.0k | New |
| ALPS ADVISORS INC 0.00% of their portfolio | 651.1k $833.4k | Added +129.6k |
| Exome Asset Management LLC 0.49% of their portfolio | 624.0k $798.8k | New |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 618.9k $792.2k | Added +588.1k |
| Rafferty Asset Management, LLC 0.00% of their portfolio | 606.4k $776.2k | Reduced -277.2k |
| Arax Advisory Partners 0.01% of their portfolio | 605.3k $774.8k | Added +493.9k |
| GSA CAPITAL PARTNERS LLP 0.05% of their portfolio | 588.2k $753.0k | Added +329.8k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 578.3k $740.3k | Reduced -72.9k |
| Lion Point Capital, LP 3.54% of their portfolio | 578.0k $739.8k | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 571.8k $852.0k | Added +16.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 558.5k $714.9k | Added +97.8k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 542.1k $693.9k | Reduced -195.0k |
| Squarepoint Ops LLC 0.00% of their portfolio | 534.5k $684.1k | New |
| Inspire Investing, LLC 0.03% of their portfolio | 526.0k $673.2k | Added +176.3k |
| Quadrature Capital Ltd 0.01% of their portfolio | 524.1k $670.8k | Added +291.7k |
| Nvest Financial, LLC 0.21% of their portfolio | 517.1k $662.0k | Added +8.7k |
| ADAR1 Capital Management, LLC 0.03% of their portfolio | 505.8k $647.4k | Added +305.8k |
| Private Advisor Group, LLC 0.00% of their portfolio | 502.9k $643.7k | Added +79.5k |
| Verdad Advisers, LP 0.61% of their portfolio | 494.2k $632.6k | New |
| XTX Topco Ltd 0.01% of their portfolio | 463.9k $593.8k | Reduced -497.3k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 459.6k $589.0k | Added +69.6k |
| SG Americas Securities, LLC 0.00% of their portfolio | 381.1k $488.0k | Added +102.0k |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 340.6k $436.0k | Added +49.9k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 328.1k $421.4k | Added +9.3k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 328.0k $419.8k | Added +77.3k |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 313.1k $400.8k | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 309.5k $396.2k | Added +12.7k |
| PROFUND ADVISORS LLC 0.01% of their portfolio | 306.6k $392.4k | Reduced -88.3k |
| MOODY NATIONAL BANK TRUST DIVISION 0.03% of their portfolio | 297.2k $380.4k | Added +1.8k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 289.5k $376.4k | Reduced -2.3k |
| MML INVESTORS SERVICES, LLC 0.00% of their portfolio | 247.9k $317.3k | New |
| Jupiter Topco LLC 0.00% of their portfolio | 239.4k $305.2k | First filing |
| Mitsubishi UFJ Trust & Banking Corp 0.00% of their portfolio | 225.6k $288.8k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 219.8k $281.4k | Unchanged |
| DIVERSIFIED TRUST CO 0.00% of their portfolio | 218.5k $279.7k | New |
| ALLSTATE CORP 0.00% of their portfolio | 210.2k $269.0k | New |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 209.6k $268.3k | Added +6.1k |
| Mason & Associates Inc 0.04% of their portfolio | 200.3k $256.4k | Added +79.6k |
| Cresset Asset Management, LLC 0.00% of their portfolio | 199.7k $255.6k | Added +5.2k |
| ProShare Advisors LLC 0.00% of their portfolio | 188.6k $241.4k | Added +80.9k |
| LPL Financial LLC 0.00% of their portfolio | 182.4k $233.5k | Added +32.6k |
| Verition Fund Management LLC 0.00% of their portfolio | 173.7k $222.3k | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 171.5k $219.5k | Unchanged |
| Creative Planning 0.00% of their portfolio | 166.0k $212.5k | Reduced -54.6k |
| Headlands Technologies LLC 0.02% of their portfolio | 159.5k $204.2k | Added +140.7k |
| State of New Jersey Common Pension Fund D 0.00% of their portfolio | 155.3k $198.8k | Reduced -8.3k |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 154.4k $197.7k | New |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 153.9k $197.0k | Added +104.9k |