CoreWeave (CRWV) — Magnetar Fund Files Beneficial Ownership Disclosure

What Happened

• A Form 4 for CoreWeave (CRWV) was filed (period of report 2026-08-13; filed 2026-08-14) by/for Magnetar-related entities. The filing does not report an open-market buy or sell by an individual officer; instead it clarifies ownership structure: the securities are held directly by Magnetar Xing He Master Fund Ltd.
• The filing’s footnotes state that Magnetar Financial LLC is the investment adviser to Magnetar Xing He Master Fund Ltd, Magnetar Capital Partners LP is the sole member/parent of Magnetar Financial, Supernova Management LLC is the general partner of Magnetar Capital Partners, and David J. Snyderman is the administrative manager of Supernova Management. Each of those entities/persons disclaims beneficial ownership of the shares except to the extent of any pecuniary interest; F4 confirms the securities are held directly by the Magnetar Fund.

Key Details

• Period of report: 2026-08-13; Filing date: 2026-08-14 (appears to be timely).
• Filing content: ownership/beneficial-ownership disclaimers and record that securities are held directly by Magnetar Xing He Master Fund Ltd. No specific buy/sell share counts, prices, or total transaction values are reported in the provided notes.
• Footnotes: F1–F4 explain adviser/ownership relationships and the disclaimer of beneficial ownership.
• Filing type: institutional disclosure clarifying who legally holds the shares (not an executive trading signal).

Context

• This is an ownership/clarification filing by an institutional investor/adviser structure rather than a typical insider purchase or sale; it does not by itself indicate a bullish or bearish view by company insiders.
• For retail investors: purchases by insiders are generally more informative than ownership-structure clarifications. If you want trading direction or position sizes, request the transaction table or the full Form 4 text so specific share counts and prices (if any) can be summarized.