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  4. [Form 4] CoreWeave, Inc. Insider Trading Activity

Call option sales on 2M CoreWeave (CRWV) shares by Magnetar funds

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

Rhea-AI Filing Summary

CoreWeave, Inc. had large derivative insider activity reported by Magnetar-affiliated entities. The Form 4 shows 12 open-market sales of call options labeled as an “obligation to sell,” tied to an aggregate 2,000,000 shares of Class A Common Stock at a $150.00 exercise price, all dated April 29, 2026 and expiring on December 18, 2026.

The options are held directly by various Magnetar Funds, including CW Opportunity 2 LP, CW Opportunity LLC, Magnetar Alpha Star Fund LLC and others, while Magnetar Financial LLC and related entities report as advisers or parent entities. They each disclaim beneficial ownership of the CoreWeave shares except to the extent of their pecuniary interest.

Positive

  • None.

Negative

  • None.

Insights

Magnetar-managed funds sold call options referencing 2M CoreWeave shares at a $150 strike.

The filing reports 12 derivative transactions, each a call option described as an obligation to sell CoreWeave Class A Common Stock. In total, they reference 2,000,000 underlying shares at a conversion or exercise price of $150.00 per share, expiring on December 18, 2026.

The securities are held directly by multiple Magnetar Funds such as CW Opportunity 2 LP and CW Opportunity LLC, while Magnetar Financial LLC and related entities act as adviser or parent entities and disclaim beneficial ownership except for pecuniary interest. The transactions are all coded as open-market sales of derivatives, and the summary shows a net-sell direction, but the filing does not provide CoreWeave’s total shares outstanding to gauge proportional impact.

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
Type Security Shares Price Value
Sale Call option (obligation to sell) 169,612 $3,434,643.00 as filed --
Sale Call option (obligation to sell) 537,865 $10,891,766.25 as filed --
Sale Call option (obligation to sell) 70,515 $1,427,928.75 $100.69B
Sale Call option (obligation to sell) 7,289 $147,602.25 $1.08B
Sale Call option (obligation to sell) 157,189 $3,183,077.25 as filed --
Sale Call option (obligation to sell) 215,805 $4,370,051.25 as filed --
Sale Call option (obligation to sell) 270,509 $5,477,807.25 as filed --
Sale Call option (obligation to sell) 61,120 $1,237,680.00 $75.65B
Sale Call option (obligation to sell) 230,106 $4,659,646.50 as filed --
Sale Call option (obligation to sell) 141,815 $2,871,753.75 as filed --
Sale Call option (obligation to sell) 114,240 $2,313,360.00 as filed --
Sale Call option (obligation to sell) 23,935 $484,683.75 $11.60B
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $3,434,643.00 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $10,891,766.25 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $3,183,077.25 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $4,370,051.25 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $5,477,807.25 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $4,659,646.50 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $2,871,753.75 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
  • Call option (obligation to sell), Apr 29, 2026. Price shown as filed: $2,313,360.00 per share is far above the $114.19 close on Apr 29, 2026, so no transaction value is shown.
Holdings After Transaction: Call option (obligation to sell) — 2,000,000 shares (Indirect, Footnotes)
Footnotes (15)
  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, 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. 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 - F LLC.
  15. F15. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
Underlying shares in call options 2,000,000 shares Aggregate underlying Class A Common Stock in 12 derivative sales on April 29, 2026
Exercise price $150.00 per share Conversion or exercise price for each call option (obligation to sell)
Largest single call option sale 537,865 options One derivative transaction dated April 29, 2026 referencing Class A shares
Derivative transactions reported 12 entries Call option (obligation to sell) transactions in this Form 4
Net share direction 2,000,000 shares sold transactionSummary netBuySellShares with net-sell direction
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 therein"
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.
general partner financial
"Magnetar Capital Partners LP is the sole member and parent holding company ... and the general partner"
A general partner is the person or firm that runs an investment partnership and legally represents it — they make the day-to-day decisions, choose which assets to buy or sell, and are responsible for the partnership’s obligations. Investors care because the general partner’s judgment, risk-taking and fee and profit-sharing arrangements determine both the potential returns and the level of exposure to losses; think of the GP as the ship’s captain whose skill and honesty shape the voyage’s outcome.

FAQ

How many CoreWeave (CRWV) shares are tied to the reported call option sales?
The Form 4 shows call option sales tied to 2,000,000 underlying shares of CoreWeave Class A Common Stock. These positions are spread across 12 derivative transactions, each reported as an open-market sale with a conversion or exercise price of $150.00 per share.

Who directly holds the CoreWeave (CRWV) option positions reported in this Form 4?
The securities are held directly by various Magnetar Funds, including CW Opportunity 2 LP, CW Opportunity LLC, Magnetar Alpha Star Fund LLC and several related vehicles. Magnetar Financial LLC and affiliated entities report as adviser or parent entities rather than direct holders of the CoreWeave securities.

Do Magnetar entities claim full beneficial ownership of the CoreWeave (CRWV) securities?
No. The filing states that each Magnetar Fund and related Magnetar entities disclaim beneficial ownership of the CoreWeave Common Stock, except to the extent of its or his pecuniary interest. This means they only acknowledge economic exposure rather than full beneficial ownership of all reported shares.

What are the key terms of the CoreWeave (CRWV) call options sold by Magnetar funds?
Each reported derivative is a call option labeled as an obligation to sell Class A Common Stock with a conversion or exercise price of $150.00 per share. All options share a common expiration date of December 18, 2026, according to the Form 4 transaction details.

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

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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)
04/29/2026		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)$15004/29/2026S169,61212/18/202612/18/2026Class A Common Stock169,612$3,434,643169,612IFootnotes(1)(2)(3)(4)
Call option (obligation to sell)$15004/29/2026S537,86512/18/202612/18/2026Class A Common Stock537,865$10,891,766.25537,865IFootnotes(1)(2)(3)(5)
Call option (obligation to sell)$15004/29/2026S70,51512/18/202612/18/2026Class A Common Stock70,515$1,427,928.7570,515IFootnotes(1)(2)(3)(6)
Call option (obligation to sell)$15004/29/2026S7,28912/18/202612/18/2026Class A Common Stock7,289$147,602.257,289IFootnotes(1)(2)(3)(7)
Call option (obligation to sell)$15004/29/2026S157,18912/18/202612/18/2026Class A Common Stock157,189$3,183,077.25157,189IFootnotes(1)(2)(3)(8)
Call option (obligation to sell)$15004/29/2026S215,80512/18/202612/18/2026Class A Common Stock215,805$4,370,051.25215,805IFootnotes(1)(2)(3)(9)
Call option (obligation to sell)$15004/29/2026S270,50912/18/202612/18/2026Class A Common Stock270,509$5,477,807.25270,509IFootnotes(1)(2)(3)(10)
Call option (obligation to sell)$15004/29/2026S61,12012/18/202612/18/2026Class A Common Stock61,120$1,237,68061,120IFootnotes(1)(2)(3)(11)
Call option (obligation to sell)$15004/29/2026S230,10612/18/202612/18/2026Class A Common Stock230,106$4,659,646.5230,106IFootnotes(1)(2)(3)(12)
Call option (obligation to sell)$15004/29/2026S141,81512/18/202612/18/2026Class A Common Stock141,815$2,871,753.75141,815IFootnotes(1)(2)(3)(13)
Call option (obligation to sell)$15004/29/2026S114,24012/18/202612/18/2026Class A Common Stock114,240$2,313,360114,240IFootnotes(1)(2)(3)(14)
Call option (obligation to sell)$15004/29/2026S23,93512/18/202612/18/2026Class A Common Stock23,935$484,683.7523,935IFootnotes(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 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 - 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 LLC05/01/2026
/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 LP05/01/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC05/01/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman05/01/2026
** 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