CoreWeave (CRWV) Magnetar Financial (10% Owner) Sells Derivative Shares

What Happened
Magnetar Financial LLC (reported as a 10% owner / investment adviser to several Magnetar funds) reported a series of sales (transaction code S) of derivative-linked positions in CoreWeave (CRWV) on 2026-08-13. The Form 4 lists 22 derivative disposal line items (all marked "Derivative") with individual share counts, per-item prices and reported disposition values. The filing shows very large reported disposition amounts — collectively about $1.56 trillion across those line items — including large blocks such as:

• 142,334 shares @ $2,832,446.60 → $403,153,454,364
• 142,333 shares @ $2,988,993.00 → $425,432,340,669
• 71,584 shares @ $1,424,521.60 → $101,972,954,214 (see the Form 4 for the full itemized list). These are reported as dispositions of derivative securities (not ordinary open-market common-stock buys).

Key Details

• Transaction date: 2026-08-13 (reported on Form 4 filed 2026-08-14 — timely filing).
• Transaction type: Sales/dispositions (code S) of derivative securities (Form 4 labels each line item "Derivative").
• Reported total of all disposal line items: approximately $1.56 trillion (sum of reported disposition values shown on the form).
• Sample line items and reported values shown above; full breakdown is in the filing (Accession 0001104659-26-097434).
• Shares owned after the transactions: not provided in the data you supplied here — see the filing for post-transaction beneficial ownership totals.
• Footnotes: Magnetar Financial is the investment adviser to multiple funds (see F1) and several items are shown as held directly by specific Magnetar funds (F4–F14). Per F3, the various Magnetar entities and individuals disclaim beneficial ownership except to the extent of pecuniary interest.

Context

• These are institutional/10%‑owner transactions (Magnetar acts as adviser to and manager of multiple funds), not an executive/director personal trade.
• "Derivative" in the Form 4 means the reported disposals relate to derivative instruments or shares underlying derivatives; that does not necessarily equal cash proceeds in the same way an open-market sale of common stock would.
• The filing is factual reporting of dispositions; it does not state motivations. Retail investors should consult the full Form 4 (accession 0001104659-26-097434) or company disclosures for details on post-transaction ownership and the exact nature of the derivative instruments.