Magnetar Financial LLC 4
4 · CoreWeave, Inc. · Filed Jun 23, 2026
Research Summary
AI-generated summary of this filing
CoreWeave (CRWV) 10% Owner Magnetar Expires Derivative Positions
What Happened
Magnetar Financial LLC (acting for multiple Magnetar funds and a 10% owner) reported that multiple short derivative positions tied to CoreWeave Class A common stock expired unexercised on June 18, 2026. The filing lists a total of 3,000,000 shares worth $0 disposed via expiration (transaction code "E"). These derivatives were part of a collar entered on September 10, 2025; both the call and put expired for no value because CoreWeave's closing price on June 18 was between the call and put strike prices. No underlying shares were transferred and no cash changed hands as a result.
Key Details
- Transaction date: 2026-06-18; filing date (Form 4): 2026-06-23.
- Total derivative shares expired: 3,000,000; reported value: $0 (expired unexercised).
- Transaction code: E (expiration of short derivative position). Footnote F1 explains the collar arrangement and why options expired worthless. Footnotes F10–F16 identify which Magnetar funds directly held the reported securities.
- Role/ownership: Magnetar Financial is an investment adviser to multiple Magnetar funds (F2); Magnetar Capital Partners and related entities are disclosed in F3–F4. These are institutional holdings (10% owner), not individual executive trades.
- Shares owned after transaction: not specified in the provided excerpt.
- Filing timeliness: filed 6/23/2026 for a 6/18/2026 transaction; no late-filing flag was provided in the supplied data.
Context
This was an expiration of option contracts (a collar), not a market sale or purchase of CoreWeave shares. When collars expire unexercised, there is no transfer of the underlying stock and no proceeds; such expirations are typically informational. Because Magnetar is reported as a 10% owner through multiple funds, this filing reflects institutional derivative activity rather than a personal insider buy/sell.
Insider Transaction Report
Form 4
CoreWeave, Inc.CRWV
Magnetar Financial LLC
10% Owner
Transactions
- ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F5]2026-06-18−91,114→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (91,114 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F5]2026-06-18−91,114→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (91,114 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F6]2026-06-18−414,002→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (414,002 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F6]2026-06-18−414,002→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (414,002 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F7]2026-06-18−54,277→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (54,277 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F7]2026-06-18−54,277→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (54,277 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F8]2026-06-18−5,612→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (5,612 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F8]2026-06-18−5,612→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (5,612 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F9]2026-06-18−120,993→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (120,993 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F9]2026-06-18−120,993→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (120,993 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F10]2026-06-18−166,109→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (166,109 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F10]2026-06-18−166,109→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (166,109 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F11]2026-06-18−208,216→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (208,216 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F11]2026-06-18−208,216→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (208,216 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F12]2026-06-18−47,045→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (47,045 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F12]2026-06-18−47,045→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (47,045 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F13]2026-06-18−177,116→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (177,116 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F13]2026-06-18−177,116→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (177,116 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F14]2026-06-18−109,158→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (109,158 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F14]2026-06-18−109,158→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (109,158 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F15]2026-06-18−87,934→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (87,934 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F15]2026-06-18−87,934→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (87,934 underlying) - ExpirationSwap
Call option (obligation to sell)
[F1][F2][F3][F4][F16]2026-06-18−18,424→ 0 total(indirect: Footnotes)Exercise: $200.00From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (18,424 underlying) - ExpirationSwap
Put option (right to sell)
[F1][F17][F2][F3][F4][F16]2026-06-18−18,424→ 0 total(indirect: Footnotes)Exercise: $82.50From: 2026-06-18Exp: 2026-06-18→ Class A Common Stock (18,424 underlying)
Footnotes (17)
- [F1]In connection with the expiration of a call option and a put option entered into on September 10, 2025, as part of a collar arrangement, both options expired unexercised and for no value on June 18, 2026, as the closing price of the Class A Common Stock on such date was between the call strike price and the put strike price.
- [F10]These securities are held directly by Magnetar Lake Credit Fund LLC.
- [F11]These securities are held directly by Magnetar Longhorn Fund LP.
- [F12]These securities are held directly by Magnetar SC Fund Ltd.
- [F13]These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund (They are not separate legal entities).
- [F14]These securities are held directly by Magnetar Xing He Master Fund Ltd.
- [F15]These securities are held directly by Purpose Alternative Credit Fund - F LLC.
- [F16]These securities are held directly by Purpose Alternative Credit Fund - T LLC.
- [F17]Expiration of a long derivative security for no value, transaction code "K" only.
- [F2]Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of CW Opportunity 2 LP, CW Opportunity LLC, Magnetar Capital Master Fund, Ltd, Magnetar Constellation Master Fund, Ltd, Magnetar Longhorn Fund LP, Magnetar SC Fund Ltd, Magnetar Xing He Master Fund Ltd, Purpose Alternative Credit Fund - F LLC, and Purpose Alternative Credit Fund - T LLC, the general partner of Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund (They are not separate legal entities), and the manager of Magnetar Alpha Star Fund LLC and Magnetar Lake Credit Fund LLC (collectively, the "Magnetar Funds").
- [F3]Magnetar Capital Partners LP ("Magnetar Capital Partners") is the sole member and parent holding company of Magnetar Financial. Supernova Management LLC ("Supernova Management") is the general partner of Magnetar Capital Partners. The administrative manager of Supernova Management is David J. Snyderman, a citizen of the United States of America.
- [F4]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.
- [F5]These securities are held directly by CW Opportunity 2 LP.
- [F6]These securities are held directly by CW Opportunity LLC.
- [F7]These securities are held directly by Magnetar Alpha Star Fund LLC.
- [F8]These securities are held directly by Magnetar Capital Master Fund, Ltd.
- [F9]These securities are held directly by Magnetar Constellation Master Fund, Ltd.