CoreWeave (CRWV) holder Magnetar funds trim 228K shares in sales

Rhea-AI Filing Summary

CoreWeave, Inc. reported insider activity showing investment funds advised by Magnetar Financial LLC and related entities executing open-market sales of 228,045 shares of Class A Common Stock on April 16, 2026. The trades were reported as indirect holdings with beneficial ownership disclaimed except for pecuniary interests.

The shares were sold in multiple transactions at weighted average prices ranging from about $117.71 to $120.64 per share. After these transactions, the Magnetar-related vehicles continue to report sizable indirect positions, including 806,391 shares and 2,728,230 shares in different funds.

Insights

Institutional ownership analyst

Large holder Magnetar funds sold 228,045 CoreWeave shares but retain sizable positions.

Investment funds advised by Magnetar Financial LLC reported open-market sales totaling 228,045 Class A shares of CoreWeave on April 16, 2026. Sale prices used weighted averages between roughly $117.71 and $120.64 per share, indicating execution across several price levels.

All positions are reported as indirect, with Magnetar entities and David J. Snyderman disclaiming beneficial ownership beyond their pecuniary interest. The filing still shows large holdings, including positions of 806,391 and 2,728,230 shares in different funds, suggesting these trades represent a partial trim rather than a full exit.

The transactions use code S, signifying open-market or private sales, and there are no derivative exercises or tax-withholding entries. Subsequent filings may clarify whether this selling pattern continues or remains a one-day liquidity event.

Insider Trade Summary

Net Seller: 228,045 shares ($26,978,121)

Net Sell 10 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 228,045 shs ($26.98M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	89,055	$117.96	$10.50M
Sale	Class A Common Stock	25,737	$119.42	$3.07M
Sale	Class A Common Stock	707	$120.64	$85K
Sale	Class A Common Stock	71,739	$117.96	$8.46M
Sale	Class A Common Stock	20,734	$119.42	$2.48M
Sale	Class A Common Stock	570	$120.64	$69K
Sale	Class A Common Stock	15,039	$117.96	$1.77M
Sale	Class A Common Stock	4,345	$119.42	$519K
Sale	Class A Common Stock	119	$120.64	$14K
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 2,851,994 shares (Indirect, Footnotes)

Footnotes (1)

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 Magnetar Xing He Master Fund Ltd, Purpose Alternative Credit Fund - F LLC, Purpose Alternative Credit Fund - T LLC, and Longhorn Special Opportunities Fund LP (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 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. These securities are held directly by Longhorn Special Opportunities Fund LP.

Key Figures

Shares sold: 228,045 shares Weighted price range (block 1): $117.71–$118.50 per share Weighted price range (block 2): $119.17–$120.00 per share +3 more

6 metrics

Shares sold 228,045 shares Total Class A shares sold on April 16, 2026

Weighted price range (block 1) $117.71–$118.50 per share Multiple transactions in first disclosed range

Weighted price range (block 2) $119.17–$120.00 per share Multiple transactions in second disclosed range

Holding example 1 806,391 shares Indirect Class A holdings after a reported sale

Holding example 2 2,728,230 shares Indirect Class A holdings after another reported sale

Sell transactions count 9 transactions Number of open-market sales reported

Key Terms

weighted average price, open-market sale, indirect ownership, beneficial ownership, +1 more

5 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.

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.

indirect ownership financial

""direct_or_indirect": "I", "ownership_type": "indirect""

beneficial ownership financial

"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"

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)
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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	04/16/2026		S		89,055	D	$117.96(1)	2,851,994	I	Footnotes(3)(4)(5)(6)
Class A Common Stock	04/16/2026		S		25,737	D	$119.42(2)	2,826,257	I	Footnotes(3)(4)(5)(6)
Class A Common Stock	04/16/2026		S		707	D	$120.64	2,825,550	I	Footnotes(3)(4)(5)(6)
Class A Common Stock	04/16/2026		S		71,739	D	$117.96(1)	2,749,534	I	Footnotes(3)(4)(5)(7)
Class A Common Stock	04/16/2026		S		20,734	D	$119.42(2)	2,728,800	I	Footnotes(3)(4)(5)(7)
Class A Common Stock	04/16/2026		S		570	D	$120.64	2,728,230	I	Footnotes(3)(4)(5)(7)
Class A Common Stock	04/16/2026		S		15,039	D	$117.96(1)	810,855	I	Footnotes(3)(4)(5)(8)
Class A Common Stock	04/16/2026		S		4,345	D	$119.42(2)	806,510	I	Footnotes(3)(4)(5)(8)
Class A Common Stock	04/16/2026		S		119	D	$120.64	806,391	I	Footnotes(3)(4)(5)(8)
Class A Common Stock								1,973,782	I	Footnotes(3)(4)(5)(9)

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

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 Magnetar Xing He Master Fund Ltd, Purpose Alternative Credit Fund - F LLC, Purpose Alternative Credit Fund - T LLC, and Longhorn Special Opportunities Fund LP (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 Magnetar Xing He Master Fund Ltd.

7. These securities are held directly by Purpose Alternative Credit Fund - F LLC.

8. These securities are held directly by Purpose Alternative Credit Fund - T LLC.

9. These securities are held directly by Longhorn Special Opportunities 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)