Form 4: Magnetar Funds Divest CoreWeave Shares, Add Collars

Magnetar Financial LLC and affiliated funds reported the sale of over 913,000 CoreWeave Class A Common Stock shares and established collar arrangements on additional shares.

Summary

• Magnetar Financial LLC, along with its affiliated funds (collectively, the "Magnetar Funds"), reported significant transactions in CoreWeave, Inc. Class A Common Stock.
• On August 15, 2025, the Magnetar Funds disposed of a total of 913,882 shares of Class A Common Stock at a price of $100.15 per share. One sale of 230,737 shares had a weighted average price ranging from $100.00 to $100.15.
• These sales were conducted by various Magnetar Funds, including Magnetar Constellation Master Fund, Ltd., CW Opportunity 2 LP, CW Opportunity LLC, Magnetar Alpha Star Fund LLC, Magnetar Capital Master Fund, Ltd., Magnetar Lake Credit Fund LLC, Magnetar Longhorn Fund LP, Magnetar SC Fund Ltd., Magnetar Structured Credit Fund, LP, Magnetar Xing He Master Fund Ltd., Purpose Alternative Credit Fund F LLC, and Purpose Alternative Credit Fund T LLC.
• Following these transactions, the Magnetar Funds collectively beneficially own millions of shares indirectly through various funds.
• Additionally, the Magnetar Funds entered into collar arrangements on 991,536 shares of Class A Common Stock, involving the writing of covered call options (strike prices $135 or $140) and the purchase of put options (strike price $80), all expiring on March 20, 2026.
• These transactions were made pursuant to a Rule 10b5-1(c) plan, indicating they were pre-planned.

Sentiment

Score: 4

Explanation: The sentiment is slightly negative due to significant insider sales by a 10% owner. However, the sales being part of a 10b5-1 plan and the implementation of a collar strategy mitigate the negative signal somewhat, indicating a pre-planned risk management approach rather than an immediate negative reaction to new information.

Positives

• The transactions were conducted under a Rule 10b5-1(c) plan, indicating pre-scheduled sales not based on new, non-public information.
• The establishment of collar arrangements demonstrates a risk management strategy to limit potential downside exposure on a significant portion of their remaining holdings.

Negatives

• Significant sales of Class A Common Stock totaling 913,882 shares by a 10% owner and affiliated entities could be perceived as a negative signal regarding their outlook on the stock.

Future Outlook

The filing does not provide forward-looking statements or guidance regarding CoreWeave, Inc.'s future performance or strategic direction. It solely reports past and planned insider transactions.

Industry Context

This Form 4 filing is specific to insider trading activity by a significant shareholder of CoreWeave, Inc. and does not provide broader industry context or trends. It reflects a specific investment strategy by Magnetar Funds rather than a general industry development.

Related Party Transactions

• The filing details transactions by Magnetar Financial LLC and its affiliated funds, which are considered related parties due to their collective 10% ownership in CoreWeave, Inc. These transactions include the sale of 913,882 shares of Class A Common Stock and the establishment of collar arrangements on 991,536 shares.

Stakeholder Impact

• Shareholders: The sale of a significant number of shares by a major institutional investor could lead to concerns about the stock's future performance or liquidity. However, the 10b5-1 plan suggests these were pre-planned and not reactive. The collar arrangement indicates a strategy to manage risk on remaining holdings.

Next Steps

• The filing does not explicitly mention future actions, events, or milestones for CoreWeave, Inc. beyond the expiration of the derivative options on March 20, 2026.

Key Dates

Recommendation

The filing reports significant insider sales by a 10% owner, which typically signals a negative outlook. However, these sales were conducted under a Rule 10b5-1 plan, indicating they were pre-scheduled and not based on new, adverse non-public information. Furthermore, the reporting person simultaneously entered into collar arrangements on a substantial portion of their remaining holdings, suggesting a strategy to manage risk rather than a complete divestment due to a negative view. Given the pre-planned nature of the sales and the risk management strategy, a 'hold' recommendation is appropriate, advising investors to monitor future developments without immediate action based solely on this transaction report.

Keywords

CoreWeave, CRWV, SEC Form 4, Insider Trading, Stock Sale, Magnetar Financial, 10b5-1 Plan, Derivative Transactions, Collar Option, Equity Sales