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

Magnetar funds trim CoreWeave (CRWV) stake with 296K-share open-market sale

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

Rhea-AI Filing Summary

CoreWeave, Inc. (CRWV) reported that investment entities advised by Magnetar Financial LLC and related Magnetar-affiliated funds executed open-market sales of Class A Common Stock. On 2026-04-23, these funds sold a total of 296,160 shares at prices between $122.09 and $123.24 per share.

The securities are held directly by various Magnetar-managed vehicles, such as CW Opportunity 2 LP and CW Opportunity LLC, while Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman each disclaim beneficial ownership beyond their pecuniary interests.

Positive

  • None.

Negative

  • None.
Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.
Role null | null | null | null
Sold 296,160 shs ($36.19M)
Type Security Shares Price Value
Sale Class A Common Stock 23,135 $122.09 $2.82M
Sale Class A Common Stock 2,607 $123.24 $321K
Sale Class A Common Stock 71,413 $122.09 $8.72M
Sale Class A Common Stock 8,049 $123.24 $992K
Sale Class A Common Stock 9,363 $122.09 $1.14M
Sale Class A Common Stock 1,056 $123.24 $130K
Sale Class A Common Stock 967 $122.09 $118K
Sale Class A Common Stock 108 $123.24 $13K
Sale Class A Common Stock 20,871 $122.09 $2.55M
Sale Class A Common Stock 2,352 $123.24 $290K
Sale Class A Common Stock 28,653 $122.09 $3.50M
Sale Class A Common Stock 3,234 $123.24 $399K
Sale Class A Common Stock 35,916 $122.09 $4.38M
Sale Class A Common Stock 4,047 $123.24 $499K
Sale Class A Common Stock 8,116 $122.09 $991K
Sale Class A Common Stock 915 $123.24 $113K
Sale Class A Common Stock 30,551 $122.09 $3.73M
Sale Class A Common Stock 3,444 $123.24 $424K
Sale Class A Common Stock 18,828 $122.09 $2.30M
Sale Class A Common Stock 2,121 $123.24 $261K
Sale Class A Common Stock 15,168 $122.09 $1.85M
Sale Class A Common Stock 1,710 $123.24 $211K
Sale Class A Common Stock 3,179 $122.09 $388K
Sale Class A Common Stock 357 $123.24 $44K
holding Class A Common Stock -- -- --
Holdings After Transaction: Class A Common Stock — 4,788,684 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 $123.16 to $123.32, 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. Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of CW Opportunity 2 LP, CW Opportunity LLC, Longhorn Special Opportunities Fund LP, 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"). 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 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. These securities are held directly by Longhorn Special Opportunities Fund LP.
Shares sold 296,160 shares Total Class A Common Stock sold on April 23, 2026 by Magnetar-advised funds
High sale price $123.24 per share Price for several open-market sales of CoreWeave Class A Common Stock
Low sale price $122.09 per share Price for several open-market sales of CoreWeave Class A Common Stock
Sale transactions 24 entries Number of sale transactions reported for April 23, 2026
Net share change -296,160 shares Net buy/sell shares from reported transactions, indicating net selling
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 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."
investment adviser financial
"Magnetar Financial LLC serves as the investment adviser to each of"
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.
ten percent owner financial
"is_ten_percent_owner": 1"
Form 4 Insider Transactions: What Each Field Means →
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)
04/23/2026		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
Class A Common Stock04/23/2026S23,135D$122.094,788,684IFootnotes(2)(3)(4)(5)
Class A Common Stock04/23/2026S2,607D$123.24(1)4,786,077IFootnotes(2)(3)(4)(5)
Class A Common Stock04/23/2026S71,413D$122.0919,896,960IFootnotes(2)(3)(4)(6)
Class A Common Stock04/23/2026S8,049D$123.24(1)19,888,911IFootnotes(2)(3)(4)(6)
Class A Common Stock04/23/2026S9,363D$122.091,272,637IFootnotes(2)(3)(4)(7)
Class A Common Stock04/23/2026S1,056D$123.24(1)1,271,581IFootnotes(2)(3)(4)(7)
Class A Common Stock04/23/2026S967D$122.09269,649IFootnotes(2)(3)(4)(8)
Class A Common Stock04/23/2026S108D$123.24(1)269,541IFootnotes(2)(3)(4)(8)
Class A Common Stock04/23/2026S20,871D$122.094,357,485IFootnotes(2)(3)(4)(9)
Class A Common Stock04/23/2026S2,352D$123.24(1)4,355,133IFootnotes(2)(3)(4)(9)
Class A Common Stock04/23/2026S28,653D$122.095,432,793IFootnotes(2)(3)(4)(10)
Class A Common Stock04/23/2026S3,234D$123.24(1)5,429,559IFootnotes(2)(3)(4)(10)
Class A Common Stock04/23/2026S35,916D$122.097,790,163IFootnotes(2)(3)(4)(11)
Class A Common Stock04/23/2026S4,047D$123.24(1)7,786,116IFootnotes(2)(3)(4)(11)
Class A Common Stock04/23/2026S8,116D$122.09925,078IFootnotes(2)(3)(4)(12)
Class A Common Stock04/23/2026S915D$123.24(1)924,163IFootnotes(2)(3)(4)(12)
Class A Common Stock04/23/2026S30,551D$122.097,783,532IFootnotes(2)(3)(4)(13)
Class A Common Stock04/23/2026S3,444D$123.24(1)7,780,088IFootnotes(2)(3)(4)(13)
Class A Common Stock04/23/2026S18,828D$122.092,574,261IFootnotes(2)(3)(4)(14)
Class A Common Stock04/23/2026S2,121D$123.24(1)2,572,140IFootnotes(2)(3)(4)(14)
Class A Common Stock04/23/2026S15,168D$122.092,525,804IFootnotes(2)(3)(4)(15)
Class A Common Stock04/23/2026S1,710D$123.24(1)2,524,094IFootnotes(2)(3)(4)(15)
Class A Common Stock04/23/2026S3,179D$122.09763,987IFootnotes(2)(3)(4)(16)
Class A Common Stock04/23/2026S357D$123.24(1)763,630IFootnotes(2)(3)(4)(16)
Class A Common Stock1,973,782IFootnotes(2)(3)(4)(17)
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
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. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $123.16 to $123.32, 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.
2. Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of CW Opportunity 2 LP, CW Opportunity LLC, Longhorn Special Opportunities Fund LP, 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").
3. 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.
4. 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.
5. These securities are held directly by CW Opportunity 2 LP.
6. These securities are held directly by CW Opportunity LLC.
7. These securities are held directly by Magnetar Alpha Star Fund LLC.
8. These securities are held directly by Magnetar Capital Master Fund, Ltd.
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 Longhorn Fund LP.
12. These securities are held directly by Magnetar SC Fund Ltd.
13. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
14. These securities are held directly by Magnetar Xing He Master Fund Ltd.
15. These securities are held directly by Purpose Alternative Credit Fund - F LLC.
16. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
17. 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 LLC04/24/2026
/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 LP04/24/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC04/24/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman04/24/2026
** 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

FAQ

What insider activity did Magnetar report for CoreWeave (CRWV) on this Form 4?

The filing shows Magnetar-advised funds executed open-market sales of CoreWeave Class A Common Stock. In total, they sold 296,160 shares on April 23, 2026 at prices just above $122 per share, reflecting net selling activity by these investment entities.

Who actually holds the CoreWeave (CRWV) shares mentioned in Magnetar’s Form 4?

The shares are held directly by various Magnetar-managed funds and vehicles, including CW Opportunity 2 LP, CW Opportunity LLC and several Magnetar-branded funds. Magnetar Financial and related entities are advisers, parent entities or managers to these vehicles rather than direct record holders.

Do Magnetar and David J. Snyderman claim full beneficial ownership of the CoreWeave (CRWV) shares?

No. The filing states that each Magnetar fund, Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman disclaims beneficial ownership of the CoreWeave common stock, except to the extent of its or his pecuniary interest in those securities.

Were the CoreWeave (CRWV) insider sales reported as open-market transactions?

Yes. Each sale entry in the Form 4 is coded “S” and described as a “Sale in open market or private transaction.” The prices and share counts indicate multiple open-market trades executed on April 23, 2026 by Magnetar-advised investment funds.

What does the weighted average price disclosure mean in the CoreWeave (CRWV) Form 4?

One footnote explains that certain reported prices are weighted averages for trades executed in multiple transactions between $123.16 and $123.32 per share. Magnetar undertakes to provide full trade-by-trade price details to CoreWeave, its shareholders or SEC staff upon request.