Form 4: Magnetar Funds Divest CoreWeave Class A Shares

Magnetar Financial LLC and related entities reported the sale of 191,331 shares of CoreWeave Class A Common Stock on October 31, 2025, under a Rule 10b5-1 plan.

Summary

• Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman, identified as 10% owners and directors of CoreWeave, Inc. (CRWV), reported multiple sales of Class A Common Stock.
• The transactions occurred on October 31, 2025, and were conducted pursuant to a Rule 10b5-1(c) plan, indicating pre-scheduled sales.
• A total of 191,331 shares of Class A Common Stock were disposed of across various Magnetar Funds.
• The sales were executed at weighted average prices ranging from $133.75 to $138.26 per share.
• Specific weighted average prices reported were $134.01, $135.10, $136.52, and $137.86.
• Following these transactions, the Magnetar Funds collectively retain significant beneficial ownership in CoreWeave, Inc., with individual fund holdings detailed in the filing.

Sentiment

Score: 4

Explanation: The sales by a significant owner and director group, while executed under a pre-planned Rule 10b5-1 plan, still represent a reduction in their stake. This can be viewed with caution by the market, though the pre-planned nature mitigates the immediate negative signal.

Negatives

• Significant sales of Class A Common Stock by a 10% owner and director group, even if pre-planned, can be perceived by the market as a reduction in confidence or a move to rebalance portfolios.

Risks

• The market may interpret the significant insider sales as a negative signal, potentially leading to downward pressure on CoreWeave's stock price.

Future Outlook

The filing does not contain any forward-looking statements or guidance regarding CoreWeave's future performance or outlook.

Management Comments

• The prices reported are weighted average prices, with securities sold in multiple transactions within specified ranges (e.g., $133.75 to $134.50, $135.00 to $135.10, $137.54 to $138.26).
• The reporting persons undertake to provide full information regarding the number of shares sold at each separate price upon request.
• Each of the Magnetar Funds, Magnetar Financial, Magnetar Capital Partners, Supernova Management, and David J. Snyderman disclaims beneficial ownership of these shares of Common Stock, except to the extent of its or his pecuniary interest therein.

Industry Context

Insider sales, particularly by significant shareholders and directors, are closely watched by the market as they can sometimes signal a change in sentiment or strategy. However, sales made under a Rule 10b5-1 plan are pre-scheduled and often less indicative of immediate sentiment shifts compared to unscheduled sales.

Related Party Transactions

• Magnetar Financial LLC serves as the investment adviser to the Magnetar Funds (Magnetar Longhorn Fund LP, Magnetar SC Fund Ltd, Magnetar Xing He Master Fund Ltd, Purpose Alternative Credit Fund F LLC, and Purpose Alternative Credit Fund T LLC) and the general partner of Magnetar Structured Credit Fund, LP.
• Magnetar Capital Partners LP is the sole member and parent holding company of Magnetar Financial LLC.
• Supernova Management LLC is the general partner of Magnetar Capital Partners LP.
• David J. Snyderman is the administrative manager of Supernova Management LLC.

Stakeholder Impact

• Shareholders may interpret the sales by a 10% owner and director group as a signal, potentially influencing their investment decisions.
• The pre-planned nature of the sales (Rule 10b5-1) may reassure some investors that the transactions are not based on new, adverse material non-public information.

Key Dates

Recommendation

The reported sales of Class A Common Stock by Magnetar Financial LLC and its related entities, which are 10% owners and directors, were executed under a Rule 10b5-1 plan. This suggests the transactions were pre-scheduled and not necessarily indicative of a change in the reporting persons' fundamental outlook on CoreWeave. While significant insider sales warrant attention, the pre-planned nature mitigates the immediate negative signal. Therefore, a 'hold' recommendation is appropriate, advising investors to monitor future developments and company performance rather than reacting solely to these pre-scheduled sales.

Keywords

CoreWeave, CRWV, Magnetar Financial, Insider Trading, Form 4, Stock Sale, Beneficial Ownership, Institutional Investor, Rule 10b5-1