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Magnetar funds sell calls on CoreWeave (CRWV) tied to 2M shares

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

Rhea-AI Filing Summary

CoreWeave, Inc. reported a Form 4 showing that investment funds advised by entities associated with Magnetar Financial LLC entered into a series of open-market sales of call options on June 1, 2026. These derivative sales cover an aggregate of 2,000,000 shares of CoreWeave Class A Common Stock, with a conversion or exercise price of $170.0000 per share and an exercise and expiration date of December 18, 2026.

The positions are held indirectly through multiple Magnetar-managed vehicles, including CW Opportunity 2 LP and other Magnetar Funds, which are advised or managed by Magnetar Financial and its affiliates. Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman each disclaim beneficial ownership of the issuer’s common stock except to the extent of their pecuniary interests.

Positive

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Insights

Magnetar-managed funds sold call options tied to 2M CoreWeave shares.

Investment funds advised by Magnetar Financial reported selling call options referencing 2,000,000 shares of CoreWeave Class A Common Stock. The options have a $170.0000 per share exercise price and mature on December 18, 2026, indicating a sizable derivative exposure rather than immediate stock sales.

All positions are held indirectly through various Magnetar Funds, and Magnetar entities plus David J. Snyderman disclaim beneficial ownership except for pecuniary interests. The filing does not show remaining derivative positions beyond these, and no Rule 10b5-1 trading plan is referenced in the provided data.

Overall this is a net-sell derivative transaction pattern, but its significance depends on CoreWeave’s total float and Magnetar-related holdings, which are not detailed here. Subsequent company or insider filings may provide additional context on how these options relate to broader ownership and risk management strategies.

Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.
Role null | null | null | null
Sold 2,000,000 shs ($13518.66B)
Type Security Shares Price Value
Sale Call option (obligation to sell) 190,937 $3,837,833.70 $732.78B
Sale Call option (obligation to sell) 605,488 $12,170,308.80 $7368.98B
Sale Call option (obligation to sell) 13,794 $277,259.40 $3.82B
Sale Call option (obligation to sell) 8,205 $164,920.50 $1.35B
Sale Call option (obligation to sell) 176,952 $3,556,735.20 $629.37B
Sale Call option (obligation to sell) 242,937 $4,883,033.70 $1186.27B
Sale Call option (obligation to sell) 304,519 $6,120,831.90 $1863.91B
Sale Call option (obligation to sell) 259,036 $5,206,623.60 $1348.70B
Sale Call option (obligation to sell) 42,584 $855,938.40 $36.45B
Sale Call option (obligation to sell) 128,603 $2,584,920.30 $332.43B
Sale Call option (obligation to sell) 26,945 $541,594.50 $14.59B
Holdings After Transaction: Call option (obligation to sell) — 190,937 shares (Indirect, Footnotes)
Footnotes (1)
  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 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"). 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. 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. These securities are held directly by CW Opportunity 2 LP. These securities are held directly by CW Opportunity LLC. These securities are held directly by Magnetar Alpha Star Fund LLC. These securities are held directly by Magnetar Capital Master Fund, Ltd. These securities are held directly by Magnetar Constellation Master Fund, Ltd. These securities are held directly by Magnetar Lake Credit Fund LLC. These securities are held directly by Magnetar Longhorn Fund LP. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities. These securities are held directly by Magnetar Xing He Master Fund Ltd. These securities are held directly by Purpose Alternative Credit Fund - F LLC. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
Underlying shares for call options sold 2,000,000 shares Aggregate underlying CoreWeave Class A shares for derivative sales on June 1, 2026
Call option exercise price $170.0000 per share Conversion or exercise price for reported CoreWeave call options
Largest single option leg 605,488 shares underlying Single call option position with 605,488 underlying CoreWeave shares
Derivative transactions count 11 transactions Total number of derivative call option sale entries on June 1, 2026
Net buy/sell shares -2,000,000 shares Transaction summary net-sell direction across reported derivative trades
Option expiration date December 18, 2026 Expiration date for all reported CoreWeave call options
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.
indirect ownership financial
"ownership_type: indirect, ownership_code: I"
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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)
06/01/2026		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)$17006/01/2026S190,93712/18/202612/18/2026Class A Common Stock190,937$3,837,833.7190,937IFootnotes(1)(2)(3)(4)
Call option (obligation to sell)$17006/01/2026S605,48812/18/202612/18/2026Class A Common Stock605,488$12,170,308.8605,488IFootnotes(1)(2)(3)(5)
Call option (obligation to sell)$17006/01/2026S13,79412/18/202612/18/2026Class A Common Stock13,794$277,259.413,794IFootnotes(1)(2)(3)(6)
Call option (obligation to sell)$17006/01/2026S8,20512/18/202612/18/2026Class A Common Stock8,205$164,920.58,205IFootnotes(1)(2)(3)(7)
Call option (obligation to sell)$17006/01/2026S176,95212/18/202612/18/2026Class A Common Stock176,952$3,556,735.2176,952IFootnotes(1)(2)(3)(8)
Call option (obligation to sell)$17006/01/2026S242,93712/18/202612/18/2026Class A Common Stock242,937$4,883,033.7242,937IFootnotes(1)(2)(3)(9)
Call option (obligation to sell)$17006/01/2026S304,51912/18/202612/18/2026Class A Common Stock304,519$6,120,831.9304,519IFootnotes(1)(2)(3)(10)
Call option (obligation to sell)$17006/01/2026S259,03612/18/202612/18/2026Class A Common Stock259,036$5,206,623.6259,036IFootnotes(1)(2)(3)(11)
Call option (obligation to sell)$17006/01/2026S42,58412/18/202612/18/2026Class A Common Stock42,584$855,938.442,584IFootnotes(1)(2)(3)(12)
Call option (obligation to sell)$17006/01/2026S128,60312/18/202612/18/2026Class A Common Stock128,603$2,584,920.3128,603IFootnotes(1)(2)(3)(13)
Call option (obligation to sell)$17006/01/2026S26,94512/18/202612/18/2026Class A Common Stock26,945$541,594.526,945IFootnotes(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 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").
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 Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
12. These securities are held directly by Magnetar Xing He Master Fund Ltd.
13. These securities are held directly by Purpose Alternative Credit Fund - F LLC.
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 LLC06/03/2026
/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 LP06/03/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC06/03/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman06/03/2026
** 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

FAQ

What insider activity did CoreWeave (CRWV) disclose in this Form 4?

CoreWeave disclosed that funds advised by Magnetar entities sold call options referencing 2,000,000 shares of CoreWeave Class A Common Stock. These open-market derivative sales occurred on June 1, 2026, establishing obligations to sell shares if the options are exercised.

What are the key terms of the call options Magnetar funds sold on CoreWeave (CRWV)?

The call options sold by Magnetar-advised funds reference CoreWeave Class A Common Stock with an exercise price of $170.0000 per share. Both the exercise date and expiration date are December 18, 2026, creating medium-term derivative exposure rather than immediate stock transactions.

How many CoreWeave shares are tied to Magnetar’s reported call option sales?

The Form 4 shows call option sales tied to an aggregate of 2,000,000 underlying shares of CoreWeave Class A Common Stock. This figure comes from the transaction summary’s total sell shares across 11 derivative transactions reported for June 1, 2026.

Do Magnetar and David J. Snyderman claim full beneficial ownership of these CoreWeave positions?

No. The filing states that each Magnetar Fund, Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman disclaims beneficial ownership of CoreWeave common stock, except to the extent of its or his pecuniary interest in the securities held by the funds.

Are these CoreWeave (CRWV) option transactions direct or indirect holdings for Magnetar?

All reported call option positions are classified as indirect ownership. The securities are held directly by various Magnetar Funds, such as CW Opportunity 2 LP and Magnetar Alpha Star Fund LLC, while Magnetar Financial and affiliates are advisers, general partners or parent entities to those vehicles.