[Form 4] CoreWeave, Inc. Insider Trading Activity

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Magnetar-managed funds reported open-market sales of 1,404,667 shares of CoreWeave, Inc. Class A Common Stock. The sales occurred on April 16, 2026 at weighted average prices within ranges from $117.71 to $120.00 per share. The shares are held by various Magnetar funds, and Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC and David J. Snyderman each disclaim beneficial ownership except for their pecuniary interests. After these sales, individual Magnetar funds continue to hold sizeable CoreWeave positions, including post-transaction balances such as 20,849,994 and 8,191,258 shares for specific funds.

Insights

Magnetar funds sold 1.4M CoreWeave shares but retain large positions.

Several investment funds advised by Magnetar Financial executed open-market sales totaling 1,404,667 CoreWeave Class A shares on April 16, 2026. Sale prices were reported as weighted averages within ranges from $117.71 to $120.00 per share.

The filing clarifies that multiple Magnetar entities, including Magnetar Capital Partners and Supernova Management, are involved structurally, while each party disclaims beneficial ownership beyond its pecuniary interest. The transactions are attributed to underlying Magnetar funds such as CW Opportunity vehicles and several master funds.

Post-transaction balances show these funds still own substantial stakes, including lines with 20,849,994 and 8,191,258 shares following the sales. The pattern reflects sizable but partial position trimming by a large institutional holder rather than a full exit, with no reference to a Rule 10b5-1 trading plan in the excerpt.

Insider Trade Summary

Net Seller: 1,404,667 shares ($166,174,535)

Net Sell 27 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 1,404,667 shs ($166.17M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	109,438	$117.96	$12.91M
Sale	Class A Common Stock	31,624	$119.42	$3.78M
Sale	Class A Common Stock	870	$120.64	$105K
Sale	Class A Common Stock	337,783	$117.96	$39.84M
Sale	Class A Common Stock	97,611	$119.42	$11.66M
Sale	Class A Common Stock	2,683	$120.64	$324K
Sale	Class A Common Stock	44,285	$117.96	$5.22M
Sale	Class A Common Stock	12,797	$119.42	$1.53M
Sale	Class A Common Stock	352	$120.64	$42K
Sale	Class A Common Stock	4,558	$117.96	$538K
Sale	Class A Common Stock	1,322	$119.42	$158K
Sale	Class A Common Stock	36	$120.64	$4K
Sale	Class A Common Stock	98,720	$117.96	$11.65M
Sale	Class A Common Stock	28,526	$119.42	$3.41M
Sale	Class A Common Stock	784	$120.64	$95K
Sale	Class A Common Stock	135,529	$117.96	$15.99M
Sale	Class A Common Stock	39,163	$119.42	$4.68M
Sale	Class A Common Stock	1,077	$120.64	$130K
Sale	Class A Common Stock	169,875	$117.96	$20.04M
Sale	Class A Common Stock	49,090	$119.42	$5.86M
Sale	Class A Common Stock	1,349	$120.64	$163K
Sale	Class A Common Stock	38,392	$117.96	$4.53M
Sale	Class A Common Stock	11,091	$119.42	$1.32M
Sale	Class A Common Stock	305	$120.64	$37K
Sale	Class A Common Stock	144,499	$117.96	$17.05M
Sale	Class A Common Stock	41,760	$119.42	$4.99M
Sale	Class A Common Stock	1,148	$120.64	$138K

Holdings After Transaction: Class A Common Stock — 5,129,942 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 $117.71 to $118.50, 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 footnote 2. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $119.17 to $120.00, inclusive. 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, and Magnetar SC Fund Ltd, 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.

Key Figures

Total shares sold: 1,404,667 shares Price range (first weighted average series): $117.71–$118.50/share Price range (second weighted average series): $119.17–$120.00/share +3 more

6 metrics

Total shares sold 1,404,667 shares Aggregate open-market sales on April 16, 2026

Price range (first weighted average series) $117.71–$118.50/share Multiple transactions reported in footnote F1

Price range (second weighted average series) $119.17–$120.00/share Multiple transactions reported in footnote F2

Post-sale holding (example fund) 20,849,994 shares Largest single post-transaction balance shown

Post-sale holding (another fund) 8,191,258 shares Post-transaction balance for a separate Magnetar fund

Sell transactions count 27 transactions Number of non-derivative sale entries on April 16, 2026

Key Terms

weighted average price, beneficial ownership, pecuniary interest, ten percent owner, +2 more

6 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

beneficial ownership regulatory

"disclaims beneficial ownership of these shares of Common Stock"

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

"except to the extent of its or his pecuniary interest therein"

ten percent owner regulatory

"is_ten_percent_owner": 1"

Class A Common Stock financial

"security_title": "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 Insider Transactions: What Each Field Means →

04/17/2026 - 08:40 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

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)
04/16/2026

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)
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	04/16/2026		S		109,438	D	$117.96⁽¹⁾	5,129,942	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾
Class A Common Stock	04/16/2026		S		31,624	D	$119.42⁽²⁾	5,098,318	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾
Class A Common Stock	04/16/2026		S		870	D	$120.64	5,097,448	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁶⁾
Class A Common Stock	04/16/2026		S		337,783	D	$117.96⁽¹⁾	20,950,288	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁷⁾
Class A Common Stock	04/16/2026		S		97,611	D	$119.42⁽²⁾	20,852,677	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁷⁾
Class A Common Stock	04/16/2026		S		2,683	D	$120.64	20,849,994	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁷⁾
Class A Common Stock	04/16/2026		S		44,285	D	$117.96⁽¹⁾	1,410,729	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁸⁾
Class A Common Stock	04/16/2026		S		12,797	D	$119.42⁽²⁾	1,397,932	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁸⁾
Class A Common Stock	04/16/2026		S		352	D	$120.64	1,397,580	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁸⁾
Class A Common Stock	04/16/2026		S		4,558	D	$117.96⁽¹⁾	283,928	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁹⁾
Class A Common Stock	04/16/2026		S		1,322	D	$119.42⁽²⁾	282,606	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁹⁾
Class A Common Stock	04/16/2026		S		36	D	$120.64	282,570	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽⁹⁾
Class A Common Stock	04/16/2026		S		98,720	D	$117.96⁽¹⁾	4,665,313	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹⁰⁾
Class A Common Stock	04/16/2026		S		28,526	D	$119.42⁽²⁾	4,636,787	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹⁰⁾
Class A Common Stock	04/16/2026		S		784	D	$120.64	4,636,003	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹⁰⁾
Class A Common Stock	04/16/2026		S		135,529	D	$117.96⁽¹⁾	5,855,412	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹¹⁾
Class A Common Stock	04/16/2026		S		39,163	D	$119.42⁽²⁾	5,816,249	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹¹⁾
Class A Common Stock	04/16/2026		S		1,077	D	$120.64	5,815,172	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹¹⁾
Class A Common Stock	04/16/2026		S		169,875	D	$117.96⁽¹⁾	8,319,913	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹²⁾
Class A Common Stock	04/16/2026		S		49,090	D	$119.42⁽²⁾	8,270,823	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹²⁾
Class A Common Stock	04/16/2026		S		1,349	D	$120.64	8,269,474	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹²⁾
Class A Common Stock	04/16/2026		S		38,392	D	$117.96⁽¹⁾	1,044,770	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹³⁾
Class A Common Stock	04/16/2026		S		11,091	D	$119.42⁽²⁾	1,033,679	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹³⁾
Class A Common Stock	04/16/2026		S		305	D	$120.64	1,033,374	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹³⁾
Class A Common Stock	04/16/2026		S		144,499	D	$117.96⁽¹⁾	8,234,166	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹⁴⁾
Class A Common Stock	04/16/2026		S		41,760	D	$119.42⁽²⁾	8,192,406	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹⁴⁾
Class A Common Stock	04/16/2026		S		1,148	D	$120.64	8,191,258	I	Footnotes⁽³⁾⁽⁴⁾⁽⁵⁾⁽¹⁴⁾

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

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. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $117.71 to $118.50, 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 footnote 2.

2. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $119.17 to $120.00, inclusive.

3. 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, and Magnetar SC Fund Ltd, 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").

4. 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.

5. 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.

6. These securities are held directly by CW Opportunity 2 LP.

7. These securities are held directly by CW Opportunity LLC.

8. These securities are held directly by Magnetar Alpha Star Fund LLC.

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

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

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

12. These securities are held directly by Magnetar Longhorn Fund LP.

13. These securities are held directly by Magnetar SC Fund Ltd.

14. These securities are held directly by Magnetar Structured Credit Fund, LP.

	/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	04/17/2026
	/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 LP	04/17/2026
	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC	04/17/2026
	/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman	04/17/2026
	** 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)

Source: View Original Filing on SEC EDGAR

[Form 4] CoreWeave, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Positive

Negative

Insights

Institutional ownership analyst neutral

Insider Trade Summary

Key Figures

Key Terms