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

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

Rhea-AI Filing Summary

CoreWeave, Inc. reported that investment entities associated with Magnetar sold exchange-traded call options referencing an aggregate of 2,000,000 shares of its Class A Common Stock. The options carry a conversion or exercise price of $160.00 per share and an exercise and expiration date of December 18, 2026.

The transactions, all dated April 15, 2026, are classified as open-market sales of derivative securities and are held indirectly through various Magnetar-managed funds, including CW Opportunity 2 LP and CW Opportunity LLC. Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC and David J. Snyderman each disclaim beneficial ownership of the underlying shares except to the extent of their pecuniary interest.

Positive

  • None.

Negative

  • None.

Insights

Magnetar-managed funds sold call options on 2M CoreWeave shares, a sizable but portfolio-context-dependent hedge or exposure shift.

Entities referred to as the Magnetar Funds executed 12 open-market sales of call options tied to an aggregate 2,000,000 CoreWeave Class A shares. Each option has a $160.00 conversion or exercise price and a common exercise and expiration date of December 18, 2026. The filing classifies all positions as derivative securities.

The options are held indirectly through specific funds such as CW Opportunity 2 LP and CW Opportunity LLC. Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC and David J. Snyderman are listed as reporting persons but disclaim beneficial ownership of the underlying stock beyond their pecuniary interest. With no remaining derivative positions listed in the derivativeSummary, this snapshot focuses solely on the reported call positions and does not quantify their size relative to CoreWeave’s overall float.

Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.
Role 10% Owner | 10% Owner | 10% Owner | 10% Owner
Sold 2,000,000 shs ($11417.97B)
Type Security Shares Price Value
Sale Call option (obligation to sell) 173,850 $3,563,925.00 $619.59B
Sale Call option (obligation to sell) 536,619 $11,000,689.50 $5903.18B
Sale Call option (obligation to sell) 70,352 $1,442,216.00 $101.46B
Sale Call option (obligation to sell) 7,272 $149,076.00 $1.08B
Sale Call option (obligation to sell) 156,825 $3,214,912.50 $504.18B
Sale Call option (obligation to sell) 215,305 $4,413,752.50 $950.30B
Sale Call option (obligation to sell) 269,883 $5,532,601.50 $1493.16B
Sale Call option (obligation to sell) 60,979 $1,250,069.50 $76.23B
Sale Call option (obligation to sell) 229,572 $4,706,226.00 $1080.42B
Sale Call option (obligation to sell) 141,487 $2,900,483.50 $410.38B
Sale Call option (obligation to sell) 113,976 $2,336,508.00 $266.31B
Sale Call option (obligation to sell) 23,880 $489,540.00 $11.69B
Holdings After Transaction: Call option (obligation to sell) — 173,850 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 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 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 SC Fund Ltd. These securities are held directly by Magnetar Structured Credit Fund, LP. 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 2,000,000 shares Aggregate Class A Common Stock referenced by call options
Exercise price $160.00 per share Conversion or exercise price of the call options
Expiration date December 18, 2026 Exercise and expiration date of the call options
Derivative transactions 12 entries Number of derivative call option sales reported
Net share direction -2,000,000 shares Net sell direction from transaction summary for underlying shares
Call option (obligation to sell financial
"security_title: "Call option (obligation to sell)" for each transaction"
pecuniary interest financial
"disclaims beneficial ownership of these shares ... except to the extent of its or his pecuniary interest therein"
indirect ownership financial
"direct_or_indirect: "I" and ownership_type: "indirect" for all transactions"
ten percent owner regulatory
"each reporting person is marked as "is_ten_percent_owner": 1"
investment adviser financial
"Magnetar Financial LLC serves as the investment adviser to each of the Magnetar Funds"
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.
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)
04/15/2026		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)$16004/15/2026S173,85012/18/202612/18/2026Class A Common Stock173,850$3,563,925173,850IFootnotes(1)(2)(3)(4)
Call option (obligation to sell)$16004/15/2026S536,61912/18/202612/18/2026Class A Common Stock536,619$11,000,689.5536,619IFootnotes(1)(2)(3)(5)
Call option (obligation to sell)$16004/15/2026S70,35212/18/202612/18/2026Class A Common Stock70,352$1,442,21670,352IFootnotes(1)(2)(3)(6)
Call option (obligation to sell)$16004/15/2026S7,27212/18/202612/18/2026Class A Common Stock7,272$149,0767,272IFootnotes(1)(2)(3)(7)
Call option (obligation to sell)$16004/15/2026S156,82512/18/202612/18/2026Class A Common Stock156,825$3,214,912.5156,825IFootnotes(1)(2)(3)(8)
Call option (obligation to sell)$16004/15/2026S215,30512/18/202612/18/2026Class A Common Stock215,305$4,413,752.5215,305IFootnotes(1)(2)(3)(9)
Call option (obligation to sell)$16004/15/2026S269,88312/18/202612/18/2026Class A Common Stock269,883$5,532,601.5269,883IFootnotes(1)(2)(3)(10)
Call option (obligation to sell)$16004/15/2026S60,97912/18/202612/18/2026Class A Common Stock60,979$1,250,069.560,979IFootnotes(1)(2)(3)(11)
Call option (obligation to sell)$16004/15/2026S229,57212/18/202612/18/2026Class A Common Stock229,572$4,706,226229,572IFootnotes(1)(2)(3)(12)
Call option (obligation to sell)$16004/15/2026S141,48712/18/202612/18/2026Class A Common Stock141,487$2,900,483.5141,487IFootnotes(1)(2)(3)(13)
Call option (obligation to sell)$16004/15/2026S113,97612/18/202612/18/2026Class A Common Stock113,976$2,336,508113,976IFootnotes(1)(2)(3)(14)
Call option (obligation to sell)$16004/15/2026S23,88012/18/202612/18/2026Class A Common Stock23,880$489,54023,880IFootnotes(1)(2)(3)(15)
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, Purpose Alternative Credit Fund - F LLC, and Purpose Alternative Credit Fund - T LLC, the general partner of Magnetar Structured Credit Fund, LP 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.
13. These securities are held directly by Magnetar Xing He Master Fund Ltd.
14. These securities are held directly by Purpose Alternative Credit Fund - F LLC.
15. 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 LLC04/17/2026
/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 LP04/17/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC04/17/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman04/17/2026
** 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

How many CoreWeave (CRWV) shares are referenced by the call options?

The reported call options reference 2,000,000 shares of CoreWeave Class A Common Stock. This figure is the aggregate underlying share amount across 12 derivative transactions, each tied to specified blocks of shares held indirectly via various Magnetar-managed investment funds.

What is the exercise price and maturity of the CoreWeave call options?

Each reported call option has a $160.00 conversion or exercise price and an exercise and expiration date of December 18, 2026. This means counterparties can require the funds to sell CoreWeave shares at $160.00 per share through that date if the options are exercised.

Who actually holds the CoreWeave options reported by Magnetar entities?

The filing states the securities are held directly by specific Magnetar Funds, including CW Opportunity 2 LP and CW Opportunity LLC. Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC and David J. Snyderman report the positions but disclaim beneficial ownership beyond their pecuniary interest.

Are these CoreWeave (CRWV) transactions direct insider trades by David J. Snyderman?

No. The reported securities are held by Magnetar-managed funds, and a footnote states that Snyderman and related Magnetar entities disclaim beneficial ownership except for pecuniary interest. His role is through control/management entities rather than direct personal ownership of the call option positions.