SCHEDULE 13G/A: RA Capital Management Discloses 9.9% Stake in Geron Corporation

RA Capital Management, along with its affiliated entities and controlling persons, has disclosed a beneficial ownership of 9.9% in Geron Corporation's common stock as of March 31, 2025.

Summary

• RA Capital Management, L.P., Peter Kolchinsky, Rajeev Shah, and RA Capital Healthcare Fund, L.P. (collectively, the "Reporting Persons") have filed an Amendment No. 5 to Schedule 13G regarding their beneficial ownership in Geron Corporation.
• As of March 31, 2025, the Reporting Persons collectively beneficially own 63,988,106 shares of Geron Corporation's Common Stock.
• This aggregate amount represents 9.9% of Geron Corporation's outstanding Common Stock, rounded down from 9.99% due to EDGAR filing system limitations.
• The beneficial ownership percentage is calculated based on 636,912,845 shares of Common Stock outstanding as of March 24, 2025, plus 3,608,740 shares issuable upon the exercise of Pre-Funded Warrants.
• RA Capital Healthcare Fund, L.P. directly holds 60,379,366 shares of Common Stock and Pre-Funded Warrants exercisable for up to 29,053,145 shares of Common Stock.
• A "Beneficial Ownership Blocker" provision in the Pre-Funded Warrants prevents their exercise to the extent that it would result in the Fund owning more than 9.99% of the Common Stock outstanding.
• The Fund has delegated sole voting and dispositive power over the reported securities to RA Capital Management, L.P., and disclaims beneficial ownership for Section 13(d) purposes due to this delegation.
• Dr. Kolchinsky and Mr. Shah, as controlling persons of RA Capital Management GP, LLC (general partner of RA Capital), may be deemed beneficial owners of the securities held by RA Capital.

Sentiment

Score: 6

Explanation: The document is a factual disclosure of beneficial ownership. A 9.9% stake by a reputable healthcare fund is generally viewed positively as a vote of confidence, but the document itself does not contain performance metrics or forward-looking statements to assess a stronger sentiment.

Positives

• A significant stake of 9.9% held by a specialized healthcare investment firm like RA Capital Management may signal confidence in Geron Corporation's long-term prospects and strategic direction.

Negatives

• The Beneficial Ownership Blocker limits RA Capital Healthcare Fund, L.P.'s ability to fully exercise its Pre-Funded Warrants if it would result in ownership exceeding 9.99%, potentially capping their direct upside from those specific warrants without triggering additional reporting requirements or a change in investment strategy.

Risks

• The Beneficial Ownership Blocker provision in the Pre-Funded Warrants limits the extent to which RA Capital Healthcare Fund, L.P. can exercise these warrants, preventing their beneficial ownership from exceeding 9.99% of the outstanding Common Stock.

Future Outlook

NA

Industry Context

This filing indicates continued significant institutional investment in Geron Corporation by a prominent healthcare-focused fund, RA Capital Management. Such substantial holdings by specialized investors are common in the biotechnology and pharmaceutical sectors, where long-term capital and strategic support can be crucial for drug development and commercialization.

Related Party Transactions

• The filing details the beneficial ownership of Geron Corporation's shares by RA Capital Management, L.P., RA Capital Healthcare Fund, L.P., and their controlling persons, Peter Kolchinsky and Rajeev Shah. While these entities and individuals are related, the filing explicitly states that the Reporting Persons disclaim status as a 'group' for purposes of this Schedule 13G.

Stakeholder Impact

• Shareholders: The disclosure of a significant institutional stake by RA Capital Management may influence investor perception and potentially provide a level of stability or confidence in the stock.
• Company Management: Awareness of a large, active institutional investor like RA Capital Management may influence strategic decisions and corporate governance considerations.

Key Dates

Keywords

Geron Corporation, RA Capital Management, Schedule 13G, Beneficial Ownership, Common Stock, Pre-Funded Warrants, Institutional Investor, Biotechnology, Healthcare Investment