CoreWeave (CRWV)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-12 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: CoreWeave, Inc. (CRWV) CIK: 0001769628 --- Reporting Owner --- Name: Magnetar Financial LLC CIK: 0001352851 Role: 10%+ Owner --- Derivative Transactions --- [Transaction #1] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -183,640 | Price: $3,659,027.00 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 183,640 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F4] These securities are held directly by CW Opportunity 2 LP. [Transaction #2] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -627,486 | Price: $12,502,658.55 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 627,486 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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 LLC. [Transaction #3] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -8,503 | Price: $169,422.28 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 8,503 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F6] These securities are held directly by Magnetar Capital Master Fund, Ltd. [Transaction #4] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -183,381 | Price: $3,653,866.43 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 183,381 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F7] These securities are held directly by Magnetar Constellation Master Fund, Ltd. [Transaction #5] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -251,762 | Price: $5,016,357.85 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 251,762 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F8] These securities are held directly by Magnetar Lake Credit Fund LLC. [Transaction #6] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -315,583 | Price: $6,287,991.28 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 315,583 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F9] These securities are held directly by Magnetar Longhorn Fund LP. [Transaction #7] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -268,446 | Price: $5,348,786.55 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 268,446 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F10] These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities. [Transaction #8] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -133,276 | Price: $2,655,524.30 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 133,276 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F11] These securities are held directly by Purpose Alternative Credit Fund - F LLC. [Transaction #9] Security: Call option (obligation to sell) Date: 2026-08-12 | Code: S (Open market sale) Shares: -27,923 | Price: $556,365.78 Exercisable: N/A | Expires: 2027-03-19 Shares Owned After: 27,923 | Ownership: I (Indirect) | Nature: Footnotes Footnotes: [F1] 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). [F2] 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. [F3] 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. [F12] These securities are held directly by Purpose Alternative Credit Fund - T LLC. --- Footnotes (Complete Index) --- F1: 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, 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 Lake Credit Fund LLC (collectively, the "Magnetar Funds"). F10: These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities. F11: These securities are held directly by Purpose Alternative Credit Fund - F LLC. F12: These securities are held directly by Purpose Alternative Credit Fund - T LLC. F2: 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. F3: 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. F4: These securities are held directly by CW Opportunity 2 LP. F5: These securities are held directly by CW Opportunity LLC. F6: These securities are held directly by Magnetar Capital Master Fund, Ltd. F7: These securities are held directly by Magnetar Constellation Master Fund, Ltd. F8: These securities are held directly by Magnetar Lake Credit Fund LLC. F9: These securities are held directly by Magnetar Longhorn Fund LP. --- Signature --- /s/ /s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC, which is the General Partner of Magnetar Capital Partners LP, which is in turn the Sole Member of Magnetar Financial LLC (2026-08-14)