Form 4: Magnetar-related entities dispose of CoreWeave (CRWV) shares in multiple blocks

Q: What did Magnetar disclose on the Form 4 for CoreWeave (CRWV)?

Magnetar disclosed multiple sales of Class A common stock on 09/19/2025 executed at weighted-average prices between about $121.78 and $128.66, across several affiliated accounts.

Q: How many shares were sold in the largest blocks reported?

Largest reported disposals include individual line items of 196,560 and 209,590 shares among others on the reported date.

Q: Do the filings show changes in beneficial ownership amounts?

Yes. Post-transaction indirect holdings reported in the filing vary by account and range roughly from 1.7 million to 10.9 million shares depending on the entity.

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

CoreWeave insider transaction summary: Multiple Magnetar-related reporting persons disclosed a series of sales of Class A common stock executed on 09/19/2025 across several blocks at weighted-average prices in the $121.78–$128.66 range. The sales reduce indirect beneficial holdings reported for various Magnetar-managed funds and affiliated entities, with individual line items showing disposals from low thousands to over 200,000 shares and resulting indirect holdings reported in the range of roughly 1.7 million to 10.9 million shares across different accounts. The filing includes footnotes clarifying entity relationships, disclaimers of beneficial ownership except for pecuniary interest, and weighted-average price explanations for multiple-sale ranges.

Positive

Complete disclosure identifying reporting persons, affiliate relationships, and footnotes clarifying beneficial ownership
Weighted-average prices and price ranges are disclosed for multi-trade executions, improving transparency about execution levels

Negative

Large aggregated dispositions across affiliated Magnetar accounts (multiple line items include six-figure share sales) that reduce indirect holdings substantially
No explanatory context in the filing for the reason for the sales or indication of a Rule 10b5-1 plan providing affirmative defense

Insights

TL;DR: Significant block sales by Magnetar entities were disclosed, lowering indirect holdings across multiple funds without stated causal explanation.

The Form 4 shows concentrated dispositions on a single transaction date across multiple affiliated accounts with several large blocks (notably transactions of 196,560 and 209,590 shares in two accounts). The weighted-average prices span about $121.78 to $128.66, indicating sales executed across a modest price band. For investors, the moves represent liquidity taken by large shareholders but the filing provides no context for motive, proceeds use, or whether sales were pre-arranged under Rule 10b5-1.

TL;DR: Disclosure appears complete with standard entity and disclaimer footnotes; large affiliated insider sales merit governance attention.

The filing properly identifies reporting persons and includes explanatory footnotes about advisory and ownership structures and disclaimers of beneficial ownership except for pecuniary interest. Multiple signatures by an attorney-in-fact are provided. From a governance perspective, clustered sales by related entities can raise questions about coordination and timing; the form, however, does not allege any trading plan or contract triggering affirmative defense protections.

Insider Trade Summary

Net Seller: 1,151,054 shares ($144,567,443)

Net Sell 30 txns

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

Role 10% Owner | 10% Owner | 10% Owner | 10% Owner

Sold 1,151,054 shs ($144.57M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	2,662	$121.90	$324K
Sale	Class A Common Stock	30,243	$124.67	$3.77M
Sale	Class A Common Stock	143,171	$125.30	$17.94M
Sale	Class A Common Stock	26,208	$126.60	$3.32M
Sale	Class A Common Stock	20,163	$127.96	$2.58M
Sale	Class A Common Stock	2,016	$128.66	$259K
Sale	Class A Common Stock	3,654	$121.90	$445K
Sale	Class A Common Stock	41,523	$124.67	$5.18M
Sale	Class A Common Stock	196,560	$125.30	$24.63M
Sale	Class A Common Stock	35,984	$126.60	$4.56M
Sale	Class A Common Stock	27,683	$127.96	$3.54M
Sale	Class A Common Stock	2,768	$128.66	$356K
Sale	Class A Common Stock	1,039	$121.90	$127K
Sale	Class A Common Stock	11,760	$124.67	$1.47M
Sale	Class A Common Stock	55,668	$125.30	$6.98M
Sale	Class A Common Stock	10,192	$126.60	$1.29M
Sale	Class A Common Stock	7,840	$127.96	$1.00M
Sale	Class A Common Stock	784	$128.66	$101K
Sale	Class A Common Stock	3,896	$121.90	$475K
Sale	Class A Common Stock	44,280	$124.67	$5.52M
Sale	Class A Common Stock	209,590	$125.30	$26.26M
Sale	Class A Common Stock	38,376	$126.60	$4.86M
Sale	Class A Common Stock	29,520	$127.96	$3.78M
Sale	Class A Common Stock	2,952	$128.66	$380K
Sale	Class A Common Stock	2,403	$121.90	$293K
Sale	Class A Common Stock	27,288	$124.67	$3.40M
Sale	Class A Common Stock	129,172	$125.30	$16.19M
Sale	Class A Common Stock	23,647	$126.60	$2.99M
Sale	Class A Common Stock	18,193	$127.96	$2.33M
Sale	Class A Common Stock	1,819	$128.66	$234K

Holdings After Transaction: Class A Common Stock — 6,604,823 shares (Indirect, Footnotes)

Footnotes (1)

The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $121.78 to $122.03, inclusive. The reporting person undertakes to provide to CoreWeave, Inc. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote and in footnotes 2, 3, 4 and 5. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $124.00 to $124.95, inclusive. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $125.00 to $125.76, inclusive. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $126.00 to $126.98, inclusive. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $127.58 to $128.30, inclusive. Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of Magnetar Constellation Master Fund, Ltd, Magnetar SC Fund Ltd and Magnetar Xing He Master Fund Ltd, the general partner of Magnetar Structured Credit Fund, LP and the manager of 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 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 Magnetar Constellation Master Fund, Ltd. These securities are held directly by Magnetar Lake Credit Fund LLC. 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.

Form 4 Insider Transactions: What Each Field Means →

09/22/2025 - 08:19 PM

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

60201

(City)

(State)

(Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
09/19/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

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

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	09/19/2025		S		2,662	D	$121.9⁽¹⁾	6,604,823	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽⁹⁾
Class A Common Stock	09/19/2025		S		30,243	D	$124.67⁽²⁾	6,574,580	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽⁹⁾
Class A Common Stock	09/19/2025		S		143,171	D	$125.3⁽³⁾	6,431,409	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽⁹⁾
Class A Common Stock	09/19/2025		S		26,208	D	$126.6⁽⁴⁾	6,405,201	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽⁹⁾
Class A Common Stock	09/19/2025		S		20,163	D	$127.96⁽⁵⁾	6,385,038	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽⁹⁾
Class A Common Stock	09/19/2025		S		2,016	D	$128.66	6,383,022	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽⁹⁾
Class A Common Stock	09/19/2025		S		3,654	D	$121.9⁽¹⁾	8,398,451	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹⁰⁾
Class A Common Stock	09/19/2025		S		41,523	D	$124.67⁽²⁾	8,356,928	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹⁰⁾
Class A Common Stock	09/19/2025		S		196,560	D	$125.3⁽³⁾	8,160,368	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹⁰⁾
Class A Common Stock	09/19/2025		S		35,984	D	$126.6⁽⁴⁾	8,124,384	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹⁰⁾
Class A Common Stock	09/19/2025		S		27,683	D	$127.96⁽⁵⁾	8,096,701	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹⁰⁾
Class A Common Stock	09/19/2025		S		2,768	D	$128.66	8,093,933	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹⁰⁾
Class A Common Stock	09/19/2025		S		1,039	D	$121.9⁽¹⁾	1,798,884	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹¹⁾
Class A Common Stock	09/19/2025		S		11,760	D	$124.67⁽²⁾	1,787,124	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹¹⁾
Class A Common Stock	09/19/2025		S		55,668	D	$125.3⁽³⁾	1,731,456	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹¹⁾
Class A Common Stock	09/19/2025		S		10,192	D	$126.6⁽⁴⁾	1,721,264	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹¹⁾
Class A Common Stock	09/19/2025		S		7,840	D	$127.96⁽⁵⁾	1,713,424	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹¹⁾
Class A Common Stock	09/19/2025		S		784	D	$128.66	1,712,640	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹¹⁾
Class A Common Stock	09/19/2025		S		3,896	D	$121.9⁽¹⁾	10,894,067	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹²⁾
Class A Common Stock	09/19/2025		S		44,280	D	$124.67⁽²⁾	10,849,787	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹²⁾
Class A Common Stock	09/19/2025		S		209,590	D	$125.3⁽³⁾	10,640,197	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹²⁾
Class A Common Stock	09/19/2025		S		38,376	D	$126.6⁽⁴⁾	10,601,821	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹²⁾
Class A Common Stock	09/19/2025		S		29,520	D	$127.96⁽⁵⁾	10,572,301	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹²⁾
Class A Common Stock	09/19/2025		S		2,952	D	$128.66	10,569,349	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹²⁾
Class A Common Stock	09/19/2025		S		2,403	D	$121.9⁽¹⁾	4,601,749	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹³⁾
Class A Common Stock	09/19/2025		S		27,288	D	$124.67⁽²⁾	4,574,461	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹³⁾
Class A Common Stock	09/19/2025		S		129,172	D	$125.3⁽³⁾	4,445,289	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹³⁾
Class A Common Stock	09/19/2025		S		23,647	D	$126.6⁽⁴⁾	4,421,642	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹³⁾
Class A Common Stock	09/19/2025		S		18,193	D	$127.96⁽⁵⁾	4,403,449	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹³⁾
Class A Common Stock	09/19/2025		S		1,819	D	$128.66	4,401,630	I	Footnotes⁽⁶⁾⁽⁷⁾⁽⁸⁾⁽¹³⁾

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

1. Name and Address of Reporting Person^*

Magnetar Financial LLC

(Last)

(First)

(Middle)

1603 ORRINGTON AVENUE

13TH FLOOR

(Street)

EVANSTON

60201

(City)

(State)

(Zip)

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

60201

(City)

(State)

(Zip)

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

60201

(City)

(State)

(Zip)

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

60201

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $121.78 to $122.03, inclusive. The reporting person undertakes to provide to CoreWeave, Inc. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote and in footnotes 2, 3, 4 and 5.

2. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $124.00 to $124.95, inclusive.

3. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $125.00 to $125.76, inclusive.

4. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $126.00 to $126.98, inclusive.

5. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $127.58 to $128.30, inclusive.

6. Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of Magnetar Constellation Master Fund, Ltd, Magnetar SC Fund Ltd and Magnetar Xing He Master Fund Ltd, the general partner of Magnetar Structured Credit Fund, LP and the manager of Magnetar Lake Credit Fund LLC (collectively, the "Magnetar Funds").

7. 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 manager of Supernova Management is David J. Snyderman, a citizen of the United States of America.

8. 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.

9. These securities are held directly by Magnetar Constellation Master Fund, Ltd.

10. These securities are held directly by Magnetar Lake Credit Fund LLC.

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.

	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as 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	09/22/2025
	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Manager of Supernova Management LLC, which is the General Partner of Magnetar Capital Partners LP	09/22/2025
	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Manager of Supernova Management LLC	09/22/2025
	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman	09/22/2025
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What did Magnetar disclose on the Form 4 for CoreWeave (CRWV)?

Magnetar disclosed multiple sales of Class A common stock on 09/19/2025 executed at weighted-average prices between about $121.78 and $128.66, across several affiliated accounts.

How many shares were sold in the largest blocks reported?

Largest reported disposals include individual line items of 196,560 and 209,590 shares among others on the reported date.

Do the filings show changes in beneficial ownership amounts?

Yes. Post-transaction indirect holdings reported in the filing vary by account and range roughly from 1.7 million to 10.9 million shares depending on the entity.

Which Magnetar entities are listed as reporting persons?

Reporting persons include Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman with explanatory footnotes on relationships.

Does the Form 4 state whether these sales were under a trading plan?

The filing does not state that the sales were made pursuant to a Rule 10b5-1 trading plan or other contract that would provide an affirmative defense.

Form 4: Magnetar-related entities dispose of CoreWeave (CRWV) shares in multiple blocks

Rhea-AI Filing Summary

Positive

Negative

Insights

Financial Analyst neutral

Corporate Governance Expert neutral

Insider Trade Summary

FAQ

What did Magnetar disclose on the Form 4 for CoreWeave (CRWV)?

How many shares were sold in the largest blocks reported?

Do the filings show changes in beneficial ownership amounts?

Which Magnetar entities are listed as reporting persons?

Does the Form 4 state whether these sales were under a trading plan?