Form 4: Magnetar Funds Divest CoreWeave Class A Stock

Magnetar Financial and related entities reported significant sales of CoreWeave Class A Common Stock on September 19, 2025, totaling over 1.45 million shares.

Summary

• Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman, all reporting persons and 10% owners/directors of CoreWeave, Inc. (CRWV), reported sales of Class A Common Stock.
• The transactions occurred on September 19, 2025, and involved the disposition of a total of 1,451,063 shares of Class A Common Stock.
• The sales were executed at weighted average prices ranging from $121.78 to $129.18 per share.
• Following these transactions, the Magnetar Funds collectively beneficially own 40,056,925 shares of CoreWeave Class A Common Stock.
• The transactions were made pursuant to a contract, instruction, or written plan for the sale of equity securities intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
• The shares were held indirectly by various Magnetar Funds, including CW Opportunity LLC, CW Opportunity 2 LP, Longhorn Special Opportunities Fund LP, Magnetar Alpha Star Fund LLC, and Magnetar Capital Master Fund, Ltd.

Sentiment

Score: 4

Explanation: The sentiment is moderately negative due to significant insider selling by a major shareholder and director group. While the sales were pre-planned under a 10b5-1 plan, the substantial volume of shares divested can still be interpreted as a cautious signal.

Negatives

• Magnetar Financial and its affiliated entities, who are 10% owners and directors of CoreWeave, divested a substantial 1,451,063 shares of Class A Common Stock, which could be perceived as a negative signal despite being executed under a pre-arranged 10b5-1 trading plan.

Future Outlook

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

Management Comments

• 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 of the Issuer, except to the extent of its or his pecuniary interest therein.

Industry Context

This filing reports an insider transaction and does not contain information directly related to broader industry trends or competitors, focusing solely on the reporting persons' equity movements in CoreWeave.

Corporate Governance

Stakeholder Impact

• Shareholders may interpret the significant insider selling as a potential lack of confidence in the company's near-term prospects, which could lead to negative market sentiment.

Key Dates

Recommendation

While the significant sale of 1,451,063 shares of CoreWeave Class A Common Stock by Magnetar Financial and its affiliated entities, who are 10% owners and directors, is a notable insider divestment, the transactions were executed under a pre-arranged Rule 10b5-1 trading plan. This mitigates the immediate negative signal as the sales were not necessarily driven by new, adverse information. Investors should monitor future filings and company performance, but for now, a 'hold' recommendation is appropriate, acknowledging the selling pressure while recognizing the structured nature of the divestment.

Keywords

CoreWeave, CRWV, Magnetar Financial, Insider Sale, Form 4, Equity, Stock, 10b5-1 Plan, Director, 10% Owner