Form 4: Magnetar Funds Divest CoreWeave Shares Under 10b5-1 Plan

Magnetar Financial LLC and related entities, a 10% owner and director of CoreWeave, Inc., reported the sale of 495,122 Class A Common Stock shares for approximately $68.5 million under a pre-arranged 10b5-1 trading plan.

Summary

• Magnetar Financial LLC, along with Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman, reported transactions involving CoreWeave, Inc. Class A Common Stock.
• The reporting persons are identified as 10% owners and directors of CoreWeave, Inc.
• A total of 495,122 shares of Class A Common Stock were disposed of (sold) on October 15, 2025.
• The sales were executed at weighted average prices ranging from $136.72 to $141 per share.
• The total value of the shares sold is approximately $68,500,000.
• These transactions were made pursuant to a Rule 10b5-1(c) contract, instruction, or written plan.
• Following these transactions, the Magnetar Funds collectively beneficially own 29,036,291 shares of CoreWeave Class A Common Stock indirectly.

Sentiment

Score: 5

Explanation: The sentiment is neutral. While a large insider sale could be negative, the explicit mention of a 10b5-1 plan indicates a pre-scheduled transaction, which typically mitigates negative interpretations regarding insider confidence in the company's future.

Positives

• The transactions were executed under a pre-arranged Rule 10b5-1 trading plan, indicating a scheduled sale rather than a reactive decision based on new information.

Negatives

• A significant reduction in beneficial ownership by a 10% owner and director, which can sometimes be interpreted as a lack of confidence, despite being pre-planned.

Risks

• The sale of a substantial number of shares by a major insider could potentially increase selling pressure on the stock, although the impact is mitigated by the 10b5-1 plan.

Future Outlook

The filing does not provide any forward-looking statements or guidance regarding CoreWeave's future performance or strategic direction.

Industry Context

This filing is a routine disclosure of insider trading activity and does not provide specific insights into broader industry trends or competitive landscape for CoreWeave, Inc.

Related Party Transactions

• The sale of Class A Common Stock by Magnetar Financial LLC and related entities, who are identified as 10% owners and directors of CoreWeave, Inc., constitutes a related party transaction.

Stakeholder Impact

• Shareholders may observe the reduction in insider ownership, though the 10b5-1 plan context suggests it is not a reactive decision.

Key Dates

Recommendation

The sale of shares by a 10% owner and director, while significant in volume, was conducted under a pre-arranged 10b5-1 trading plan. This suggests the transaction was scheduled and not based on new, material non-public information, thus not necessarily signaling a change in the insider's long-term view of the company. Investors should 'hold' and monitor future developments rather than reacting solely to this planned divestment.

Keywords

CoreWeave, CRWV, Magnetar Financial, Insider Sale, Form 4, 10b5-1 Plan, Beneficial Ownership, Equity Transaction