CoreWeave (CRWV) 10% Owner Magnetar Financial Sells 100,000 Shares

What Happened Magnetar Financial LLC, listed as a 10% owner of CoreWeave (CRWV), sold a total of 100,000 shares on August 13, 2026 in three transactions at $105.45 per share, generating total proceeds of $10,545,050. All three entries are reported as sales (code S) and are classified in the filing as “Derivative” disposals. This was a sale (not a purchase), which is generally routine for large institutional holders and does not by itself signal management sentiment.

Key Details

• Transaction date: August 13, 2026. Form 4 filed August 14, 2026 (next-day filing — appears timely).
• Trades: 26,014 shares for $2,743,189; 23,128 shares for $2,438,859; 50,858 shares for $5,363,002 — all at $105.45/share.
• Total: 100,000 shares sold; total proceeds ≈ $10,545,050.
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Notable footnotes: Magnetar Financial is the investment adviser to multiple Magnetar funds; the securities are held directly by several of those funds (e.g., Magnetar Structured Credit Fund d/b/a Magnetar Constellation Onshore Fund; Purpose Alternative Credit Fund - F LLC; Purpose Alternative Credit Fund - T LLC; Magnetar Alpha Star Fund LLC, etc.). Magnetar entities disclaim beneficial ownership except to the extent of pecuniary interest.
• Derivative note: The filing labels these as “Derivative,” indicating the disposals relate to derivative holdings (per the Form 4 classification) rather than being straightforward open-market disposals of previously held common stock.

Context

• This is institutional (10% owner) selling activity, not an executive insider trade. Institutional sales can reflect portfolio rebalancing or liquidity needs and should not be read as a direct statement about company fundamentals.
• No purchases, option exercises, or awards were reported in this filing.