CoreWeave (CRWV) sees Magnetar funds sell calls on 300,000 shares

Rhea-AI Filing Summary

CoreWeave, Inc. reported that investment funds advised by Magnetar Financial LLC entered into open-market sales of call options referencing 300,000 shares of CoreWeave Class A common stock. These call options carry a $180.00 exercise price and an exercise and expiration date of December 18, 2026.

The options are held indirectly through multiple Magnetar-managed vehicles, including CW Opportunity 2 LP, CW Opportunity LLC and various Magnetar and Purpose funds. Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman each disclaim beneficial ownership of the underlying shares except to the extent of their pecuniary interest.

Insights

Equity derivatives analyst

Magnetar-related funds sold call options on 300,000 CoreWeave shares at a fixed strike.

Investment vehicles advised by Magnetar Financial sold call options referencing 300,000 CoreWeave Class A shares with a strike price of $180.00 and a common exercise and expiration date of December 18, 2026. These are derivative transactions, not direct share sales.

The trades represent 100% net-sell activity in this filing’s transaction summary, but they are executed through funds that hold the positions and are reported on an indirect basis. The reporting parties collectively disclaim beneficial ownership beyond their pecuniary interest, so the economic exposure sits primarily at the fund level rather than personally.

Insider Trade Summary

Net Seller: 300,000 shares ($265,376,509,560)

Net Sell 11 txns

Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.

Role null | null | null | null

Sold 300,000 shs ($265.38B)

Type	Security	Shares	Price	Value
Sale	Call option (obligation to sell)	26,244	$524,880.00	$13.77B
Sale	Call option (obligation to sell)	83,223	$1,664,460.00	$138.52B
Sale	Call option (obligation to sell)	10,911	$218,220.00	$2.38B
Sale	Call option (obligation to sell)	1,128	$22,560.00	$25.45M
Sale	Call option (obligation to sell)	24,321	$486,420.00	$11.83B
Sale	Call option (obligation to sell)	33,391	$667,820.00	$22.30B
Sale	Call option (obligation to sell)	41,856	$837,120.00	$35.04B
Sale	Call option (obligation to sell)	35,604	$712,080.00	$25.35B
Sale	Call option (obligation to sell)	21,943	$438,860.00	$9.63B
Sale	Call option (obligation to sell)	17,676	$353,520.00	$6.25B
Sale	Call option (obligation to sell)	3,703	$74,060.00	$274.24M

Holdings After Transaction: Call option (obligation to sell) — 26,244 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.

Key Figures

Underlying shares: 300,000 shares Strike price: $180.00 per share Expiration date: December 18, 2026 +3 more

6 metrics

Underlying shares 300,000 shares Total CoreWeave Class A shares referenced by call options in this filing

Strike price $180.00 per share Conversion or exercise price of the reported call options

Expiration date December 18, 2026 Exercise and expiration date for all reported call options

Derivative transaction count 11 transactions Number of call option sale entries reported

Net share direction 300,000 share equivalent sold Transaction summary net-sell shares from derivative activity

Insider status Ten percent owner Reporting persons flagged as 10% owners of CoreWeave

Key Terms

Call option (obligation to sell), ten percent owner, indirect, pecuniary interest, +2 more

6 terms

Call option (obligation to sell) financial

"security_title: "Call option (obligation to sell)""

ten percent owner regulatory

"reporting persons are marked as "is_ten_percent_owner": 1"

indirect financial

"ownership_type": "indirect", "ownership_code": "I""

pecuniary interest financial

"disclaims beneficial ownership... except to the extent of its or his pecuniary interest therein"

beneficial ownership regulatory

"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.

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.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED 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)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/05/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form 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)
			Code	V	Amount	(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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Call option (obligation to sell)	$180	05/05/2026		S			26,244	12/18/2026	12/18/2026	Class A Common Stock	26,244	$524,880	26,244	I	Footnotes(1)(2)(3)(4)
Call option (obligation to sell)	$180	05/05/2026		S			83,223	12/18/2026	12/18/2026	Class A Common Stock	83,223	$1,664,460	83,223	I	Footnotes(1)(2)(3)(5)
Call option (obligation to sell)	$180	05/05/2026		S			10,911	12/18/2026	12/18/2026	Class A Common Stock	10,911	$218,220	10,911	I	Footnotes(1)(2)(3)(6)
Call option (obligation to sell)	$180	05/05/2026		S			1,128	12/18/2026	12/18/2026	Class A Common Stock	1,128	$22,560	1,128	I	Footnotes(1)(2)(3)(7)
Call option (obligation to sell)	$180	05/05/2026		S			24,321	12/18/2026	12/18/2026	Class A Common Stock	24,321	$486,420	24,321	I	Footnotes(1)(2)(3)(8)
Call option (obligation to sell)	$180	05/05/2026		S			33,391	12/18/2026	12/18/2026	Class A Common Stock	33,391	$667,820	33,391	I	Footnotes(1)(2)(3)(9)
Call option (obligation to sell)	$180	05/05/2026		S			41,856	12/18/2026	12/18/2026	Class A Common Stock	41,856	$837,120	41,856	I	Footnotes(1)(2)(3)(10)
Call option (obligation to sell)	$180	05/05/2026		S			35,604	12/18/2026	12/18/2026	Class A Common Stock	35,604	$712,080	35,604	I	Footnotes(1)(2)(3)(11)
Call option (obligation to sell)	$180	05/05/2026		S			21,943	12/18/2026	12/18/2026	Class A Common Stock	21,943	$438,860	21,943	I	Footnotes(1)(2)(3)(12)
Call option (obligation to sell)	$180	05/05/2026		S			17,676	12/18/2026	12/18/2026	Class A Common Stock	17,676	$353,520	17,676	I	Footnotes(1)(2)(3)(13)
Call option (obligation to sell)	$180	05/05/2026		S			3,703	12/18/2026	12/18/2026	Class A Common Stock	3,703	$74,060	3,703	I	Footnotes(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

	Director	X	10% 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

	Director	X	10% 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

	Director	X	10% 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

	Director	X	10% 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 LLC	05/06/2026
	/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 LP	05/06/2026
	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC	05/06/2026
	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman	05/06/2026
	** Signature of Reporting Person	Date
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)

FAQ

What did Magnetar-related entities do in this CoreWeave (CRWV) Form 4 filing?

Funds advised by Magnetar Financial sold call options referencing 300,000 CoreWeave Class A shares. These options were reported as open-market derivative sales, not direct stock trades, with all positions held indirectly through various Magnetar-managed and Purpose Alternative Credit funds.

How many CoreWeave shares are tied to the call options sold by Magnetar funds?

The filing shows call option sales tied to 300,000 shares of CoreWeave Class A common stock. Each option references one underlying share, and the transaction summary aggregates all 11 derivative sales into this single 300,000-share notional exposure figure.

What is the strike price and maturity of the CoreWeave call options sold?

All reported call options have a conversion or exercise price of $180.00 per share. The exercise date and expiration date are both listed as December 18, 2026, meaning the obligations associated with these options are linked to that single future date.

Who actually holds the CoreWeave options reported by Magnetar Financial LLC?

The derivatives are held by multiple funds, including CW Opportunity 2 LP, CW Opportunity LLC, Magnetar Alpha Star Fund LLC and other Magnetar and Purpose vehicles. Magnetar Financial and related entities report indirectly and disclaim beneficial ownership except for their pecuniary interest.

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

No. The filing states that Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman each disclaim beneficial ownership, except to the extent of their pecuniary interest. The securities are held directly by various Magnetar Funds and Purpose Alternative Credit funds.