SCHEDULE: Magnetar Funds Disclose 2.50% Stake in GSR III Acquisition Corp.

Magnetar Financial LLC and its affiliates reported a beneficial ownership of 2.50% in GSR III Acquisition Corp.'s Class A ordinary shares as of September 30, 2025.

Summary

• Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman (collectively, the "Reporting Persons") filed an Amendment No. 2 to Schedule 13G.
• As of September 30, 2025, the Reporting Persons beneficially owned 585,653 Class A ordinary shares of GSR III Acquisition Corp.
• This ownership represents approximately 2.50% of the total outstanding Class A ordinary shares of the Issuer.
• The shares are held across several Magnetar Funds, including Constellation Master Fund, Lake Credit Fund, Structured Credit Fund, Xing He Master Fund, Alpha Star Fund, Purpose Credit Fund, Magnetar SC Fund, and Purpose Credit Fund T.
• The Reporting Persons certified that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing the control of the issuer.

Sentiment

Score: 5

Explanation: The filing is a factual, routine disclosure of beneficial ownership and does not contain information that would significantly alter sentiment regarding the issuer's performance or prospects. It reflects a neutral, passive investment.

Positives

• The filing indicates continued institutional ownership by Magnetar Funds, which can be viewed as a vote of confidence in the issuer's long-term prospects.
• The Reporting Persons explicitly state that their holdings are for ordinary course of business and not for influencing control, suggesting a passive investment approach.

Negatives

• The filing is a routine ownership disclosure and does not contain information typically categorized as negative regarding the issuer's operational or financial performance.

Risks

• The filing does not detail specific risks related to GSR III Acquisition Corp.'s business operations or financial health.
• The Reporting Persons certified that their acquisition and holding of securities are not for the purpose of changing or influencing the control of the issuer, mitigating potential activist investor risks from this group.

Future Outlook

The filing is a disclosure of current beneficial ownership and does not provide any forward-looking statements or guidance regarding the issuer's future performance or strategic direction.

Industry Context

This filing is a standard disclosure of institutional ownership in a publicly traded company, common in the financial industry. It reflects a passive investment by a hedge fund group in a Special Purpose Acquisition Company (SPAC), GSR III Acquisition Corp., which is typically formed to merge with or acquire another company.

Comparison to Industry Standards

• This Schedule 13G filing is a routine disclosure required by SEC regulations for institutional investors holding less than 5% of a company's outstanding shares, or for those who previously filed a 13D and are now eligible for 13G status due to passive intent.
• The 2.50% stake is a relatively modest position for an institutional investor like Magnetar, which manages various funds. Such stakes are common across the investment landscape and do not typically signal a significant strategic move or activist intent.

Stakeholder Impact

• Shareholders: Provides transparency regarding significant institutional holders, confirming Magnetar's continued passive stake.
• Management: Confirms a portion of the company's shares are held by a passive institutional investor, not seeking control.

Next Steps

• GSR III Acquisition Corp. will continue its operations, potentially seeking a business combination target.
• Magnetar Financial LLC and its affiliates will continue to monitor their investment in GSR III Acquisition Corp. and file further amendments to Schedule 13G if their beneficial ownership changes significantly or their investment intent shifts.

Key Dates

Keywords

GSR III Acquisition Corp., Magnetar Financial LLC, Schedule 13G, Beneficial Ownership, Class A ordinary shares, Institutional Investor, SEC Filing, Investment Adviser, SPAC