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CoreWeave (CRWV): Magnetar funds enter call options on 1,000,000 shares

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

Magnetar-related entities reported 22 derivative transactions involving call options on CoreWeave, Inc. Class A Common Stock on 2026-08-13. The options create an obligation to sell 1,000,000 underlying shares at exercise prices of $135 and $140 per share, exercisable and expiring on 2027-03-19. The positions are held through various Magnetar funds, which, along with Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC and David J. Snyderman, disclaim beneficial ownership except to the extent of their pecuniary interest.

Positive

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Negative

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Insights

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Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.
Role 10% Owner | 10% Owner | 10% Owner | 10% Owner
Sold 1,000,000 shs ($1558.70B)
Type Security Shares Price Value
Sale Call option (obligation to sell) F1, F2, F3, F4 41,654 $828,914.60 $34.53B
Sale Call option (obligation to sell) F1, F2, F3, F4 41,655 $874,755.00 $36.44B
Sale Call option (obligation to sell) F1, F2, F3, F5 142,334 $2,832,446.60 $403.15B
Sale Call option (obligation to sell) F1, F2, F3, F5 142,333 $2,988,993.00 $425.43B
Sale Call option (obligation to sell) F1, F2, F3, F6 19,723 $392,487.70 $7.74B
Sale Call option (obligation to sell) F1, F2, F3, F6 19,722 $414,162.00 $8.17B
Sale Call option (obligation to sell) F1, F2, F3, F7 1,929 $38,387.10 $74.05M
Sale Call option (obligation to sell) F1, F2, F3, F7 1,929 $40,509.00 $78.14M
Sale Call option (obligation to sell) F1, F2, F3, F8 41,596 $827,760.40 $34.43B
Sale Call option (obligation to sell) F1, F2, F3, F8 41,597 $873,537.00 $36.34B
Sale Call option (obligation to sell) F1, F2, F3, F9 57,108 $1,136,449.20 $64.90B
Sale Call option (obligation to sell) F1, F2, F3, F9 57,107 $1,199,247.00 $68.49B
Sale Call option (obligation to sell) F1, F2, F3, F10 71,584 $1,424,521.60 $101.97B
Sale Call option (obligation to sell) F1, F2, F3, F10 71,584 $1,503,264.00 $107.61B
Sale Call option (obligation to sell) F1, F2, F3, F11 17,384 $345,941.60 $6.01B
Sale Call option (obligation to sell) F1, F2, F3, F11 17,384 $365,064.00 $6.35B
Sale Call option (obligation to sell) F1, F2, F3, F12 60,892 $1,211,750.80 $73.79B
Sale Call option (obligation to sell) F1, F2, F3, F12 60,892 $1,278,732.00 $77.86B
Sale Call option (obligation to sell) F1, F2, F3, F13 39,463 $785,313.70 $30.99B
Sale Call option (obligation to sell) F1, F2, F3, F13 39,463 $828,723.00 $32.70B
Sale Call option (obligation to sell) F1, F2, F3, F14 6,333 $126,026.70 $798.13M
Sale Call option (obligation to sell) F1, F2, F3, F14 6,334 $133,014.00 $842.51M
Holdings After Transaction: Call option (obligation to sell) — 1,000,000 shares (Indirect, Footnotes)
Footnotes (14)
  1. 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, Magnetar SC Fund Ltd, Magnetar Xing He Master Fund Ltd 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").
  2. 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.
  3. 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.
  4. F4. These securities are held directly by CW Opportunity 2 LP.
  5. F5. These securities are held directly by CW Opportunity LLC.
  6. F6. These securities are held directly by Magnetar Alpha Star Fund LLC.
  7. F7. These securities are held directly by Magnetar Capital Master Fund, Ltd.
  8. F8. These securities are held directly by Magnetar Constellation Master Fund, Ltd.
  9. F9. These securities are held directly by Magnetar Lake Credit Fund LLC.
  10. F10. These securities are held directly by Magnetar Longhorn Fund LP.
  11. F11. These securities are held directly by Magnetar SC Fund Ltd.
  12. F12. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
  13. F13. These securities are held directly by Magnetar Xing He Master Fund Ltd.
  14. F14. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
Underlying shares 1,000,000 shares Total underlying Class A Common Stock tied to reported call options
Exercise prices $135 and $140 per share Conversion or exercise prices for the call options
Exercise and expiration date 2027-03-19 Date on which the options are exercisable and expire
Derivative transactions 22 Number of derivative entries reported, all coded as sales (S)
Net derivative direction -1,000,000 shares NetSellShares in transaction summary, indicating a net sell of underlying exposure
10b5-1 plan checkbox false Document-level Rule 10b5-1 checkbox was not marked as an affirmed plan
call option (obligation to sell) financial
"security_title: "Call option (obligation to sell)""
beneficial ownership financial
"disclaims beneficial ownership of these shares of Common Stock of the Issuer"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"disclaims beneficial ownership ... except to the extent of its or his pecuniary interest"
investment adviser financial
"Magnetar Financial LLC serves as the investment adviser to each of CW Opportunity 2 LP"
An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.
ten percent owner financial
"each reporting person is listed as is_ten_percent_owner"

FAQ

What did Magnetar entities report in this Form 4 for CRWV?
They reported 22 derivative transactions on 2026-08-13 involving call options that create an obligation to sell 1,000,000 CoreWeave Class A shares at set exercise prices in March 2027.

How many CoreWeave (CRWV) shares are tied to the reported options?
The call options reported are linked to 1,000,000 underlying shares of CoreWeave Class A Common Stock, based on the filing’s aggregate sellShares total in the transaction summary.

What are the exercise terms of the CoreWeave (CRWV) call options?
The options have exercise prices of $135 and $140 per share and are both exercisable and set to expire on 2027-03-19, according to the derivative transaction details.

Who are the reporting persons in the CoreWeave (CRWV) Form 4?
The reporting persons are Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman, all listed as ten percent owners in relation to CoreWeave, Inc.

Which entities directly hold the CoreWeave (CRWV) derivatives for Magnetar?
The options are held directly by various Magnetar funds, including entities such as CW Opportunity 2 LP, CW Opportunity LLC, Magnetar Alpha Star Fund LLC, and others identified in the footnotes for specific transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Magnetar Financial LLC
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
CoreWeave, Inc. [ CRWV ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/13/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Call option (obligation to sell)$13508/13/2026S41,65403/19/202703/19/2027Class A Common Stock41,654$828,914.641,654IFootnotes(1)(2)(3)(4)
Call option (obligation to sell)$14008/13/2026S41,65503/19/202703/19/2027Class A Common Stock41,655$874,75541,655IFootnotes(1)(2)(3)(4)
Call option (obligation to sell)$13508/13/2026S142,33403/19/202703/19/2027Class A Common Stock142,334$2,832,446.6142,334IFootnotes(1)(2)(3)(5)
Call option (obligation to sell)$14008/13/2026S142,33303/19/202703/19/2027Class A Common Stock142,333$2,988,993142,333IFootnotes(1)(2)(3)(5)
Call option (obligation to sell)$13508/13/2026S19,72303/19/202703/19/2027Class A Common Stock19,723$392,487.719,723IFootnotes(1)(2)(3)(6)
Call option (obligation to sell)$14008/13/2026S19,72203/19/202703/19/2027Class A Common Stock19,722$414,16219,722IFootnotes(1)(2)(3)(6)
Call option (obligation to sell)$13508/13/2026S1,92903/19/202703/19/2027Class A Common Stock1,929$38,387.11,929IFootnotes(1)(2)(3)(7)
Call option (obligation to sell)$14008/13/2026S1,92903/19/202703/19/2027Class A Common Stock1,929$40,5091,929IFootnotes(1)(2)(3)(7)
Call option (obligation to sell)$13508/13/2026S41,59603/19/202703/19/2027Class A Common Stock41,596$827,760.441,596IFootnotes(1)(2)(3)(8)
Call option (obligation to sell)$14008/13/2026S41,59703/19/202703/19/2027Class A Common Stock41,597$873,53741,597IFootnotes(1)(2)(3)(8)
Call option (obligation to sell)$13508/13/2026S57,10803/19/202703/19/2027Class A Common Stock57,108$1,136,449.257,108IFootnotes(1)(2)(3)(9)
Call option (obligation to sell)$14008/13/2026S57,10703/19/202703/19/2027Class A Common Stock57,107$1,199,24757,107IFootnotes(1)(2)(3)(9)
Call option (obligation to sell)$13508/13/2026S71,58403/19/202703/19/2027Class A Common Stock71,584$1,424,521.671,584IFootnotes(1)(2)(3)(10)
Call option (obligation to sell)$14008/13/2026S71,58403/19/202703/19/2027Class A Common Stock71,584$1,503,26471,584IFootnotes(1)(2)(3)(10)
Call option (obligation to sell)$13508/13/2026S17,38403/19/202703/19/2027Class A Common Stock17,384$345,941.617,384IFootnotes(1)(2)(3)(11)
Call option (obligation to sell)$14008/13/2026S17,38403/19/202703/19/2027Class A Common Stock17,384$365,06417,384IFootnotes(1)(2)(3)(11)
Call option (obligation to sell)$13508/13/2026S60,89203/19/202703/19/2027Class A Common Stock60,892$1,211,750.860,892IFootnotes(1)(2)(3)(12)
Call option (obligation to sell)$14008/13/2026S60,89203/19/202703/19/2027Class A Common Stock60,892$1,278,73260,892IFootnotes(1)(2)(3)(12)
Call option (obligation to sell)$13508/13/2026S39,46303/19/202703/19/2027Class A Common Stock39,463$785,313.739,463IFootnotes(1)(2)(3)(13)
Call option (obligation to sell)$14008/13/2026S39,46303/19/202703/19/2027Class A Common Stock39,463$828,72339,463IFootnotes(1)(2)(3)(13)
Call option (obligation to sell)$13508/13/2026S6,33303/19/202703/19/2027Class A Common Stock6,333$126,026.76,333IFootnotes(1)(2)(3)(14)
Call option (obligation to sell)$14008/13/2026S6,33403/19/202703/19/2027Class A Common Stock6,334$133,0146,334IFootnotes(1)(2)(3)(14)
1. Name and Address of Reporting Person*
Magnetar Financial LLC
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Magnetar Capital Partners LP
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Supernova Management LLC
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Snyderman David J.
(Last)(First)(Middle)
1603 ORRINGTON AVENUE
13TH FLOOR
(Street)
EVANSTON ILLINOIS 60201
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
Explanation of Responses:
1. 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 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").
2. 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.
3. 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.
4. These securities are held directly by CW Opportunity 2 LP.
5. These securities are held directly by CW Opportunity LLC.
6. These securities are held directly by Magnetar Alpha Star Fund LLC.
7. These securities are held directly by Magnetar Capital Master Fund, Ltd.
8. These securities are held directly by Magnetar Constellation Master Fund, Ltd.
9. These securities are held directly by Magnetar Lake Credit Fund LLC.
10. These securities are held directly by Magnetar Longhorn Fund LP.
11. These securities are held directly by Magnetar SC Fund Ltd.
12. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
13. These securities are held directly by Magnetar Xing He Master Fund Ltd.
14. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
/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 LLC08/14/2026
/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 LP08/14/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC08/14/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman08/14/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR