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Buy Day today: Neutral (51) Mixed market breadth · no major macro event
GERN

Geron Corporation

Healthcare · Biotechnology

1.30$ -1.5% vs. previous close Closing price · As of: Sep 18, 2026

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%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 79.5%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 0.1%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 86.6%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 13.3%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 643Mio.

Largest Shareholders

Institutions

Institutions GERN
Name Stake (%) Shares Change (%) Date
RA Capital Management, LLC 9.93 63,771,366 +0.0 03/31/2026
BlackRock Inc 7.37 47,319,779 +3.1 03/31/2026
Soleus Capital Management, L.P. 6.66 42,808,659 +3.1 06/30/2026
State Street Corp 4.75 30,497,183 +13.5 03/31/2026
Citadel Advisors Llc 4.52 29,038,928 +34.6 06/30/2026
Vanguard Capital Management, LLC 4.15 26,669,029 +0.0 03/31/2026
Point72 Asset Management, L.P. 3.18 20,457,134 +0.0 03/31/2026
ClearBridge Advisors, LLC 3.05 19,620,320 +37.8 03/31/2026

Funds

Funds GERN
Name Stake (%) Shares Change (%) Date
State Street® SPDR® S&P® Biotech ETF 3.58 23,023,754 -1.1 08/31/2026
Vanguard MStar Total Stk Mkt Idx Invest 3.18 20,449,234 +0.0 07/31/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: September 18, 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.

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