Magnetar Financial LLC 4

What Happened Magnetar Financial LLC (a 10% owner/investment adviser to several Magnetar funds) exercised in‑the‑money derivative instruments on March 19, 2026 to acquire a total of 375,000 CoreWeave (CRWV) shares. The exercises were for 179,250; 16,500; 51,375; 8,250; and 119,625 shares, each exercised at $40.00 per share, for an aggregate cash cost of $15,000,000. The filing also reports the related disposition of the derivative instruments (reported at $0), which reflects surrender/conversion of the options upon exercise.

Key Details

• Transaction date: 2026-03-19; Form 4 filed 2026-03-20 (timely within reporting window).
• Price paid: $40.00 per share; total cash paid = $15,000,000.
• Shares acquired: 375,000 total (broken down: 179,250; 16,500; 51,375; 8,250; 119,625).
• Derivative instruments: same quantities reported as disposed at $0 — standard when options are surrendered on exercise.
• Post‑transaction beneficial ownership: not stated in the provided summary of the filing.
• Footnotes: Magnetar Financial is the investment adviser to multiple funds that directly hold the securities (see footnotes F1, F10–F16). Magnetar entities disclaim beneficial ownership except to the extent of pecuniary interest.

Context This is an institutional exercise of options by a 10% owner rather than an executive sale. The filing shows a cash exercise (payment of $40 per share) and no concurrent sale of the newly acquired shares was reported, so this represents an acquisition of shares rather than a sale. For retail investors, purchases by large holders can be informational but do not by themselves indicate the manager’s motive; the filing is routine and was timely.