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

Magnetar funds sell 323,452 CoreWeave (CRWV) shares in market trades

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

Rhea-AI Filing Summary

CoreWeave, Inc. received a Form 4 showing that investment entities advised by Magnetar sold Class A Common Stock. On April 21, 2026, Magnetar-affiliated funds completed 12 open-market sales totaling 323,452 shares of CoreWeave Class A stock at a weighted average price of $118.26 per share.

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

Positive

  • None.

Negative

  • None.
Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.
Role null | null | null | null
Sold 323,452 shs ($38.25M)
Type Security Shares Price Value
Sale Class A Common Stock 28,117 $118.26 $3.33M
Sale Class A Common Stock 86,783 $118.26 $10.26M
Sale Class A Common Stock 11,376 $118.26 $1.35M
Sale Class A Common Stock 1,179 $118.26 $139K
Sale Class A Common Stock 25,361 $118.26 $3.00M
Sale Class A Common Stock 34,817 $118.26 $4.12M
Sale Class A Common Stock 43,649 $118.26 $5.16M
Sale Class A Common Stock 9,859 $118.26 $1.17M
Sale Class A Common Stock 37,129 $118.26 $4.39M
Sale Class A Common Stock 22,886 $118.26 $2.71M
Sale Class A Common Stock 18,435 $118.26 $2.18M
Sale Class A Common Stock 3,861 $118.26 $457K
holding Class A Common Stock -- -- --
Holdings After Transaction: Class A Common Stock — 5,023,856 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 $118.00 to $118.74, 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 323,452 shares Total CoreWeave Class A shares sold on April 21, 2026
Weighted average sale price $118.26 per share Average price across multiple sale transactions
Sale price range $118.00–$118.74 per share Price range for CoreWeave share sales disclosed in footnote
Number of sale transactions 12 transactions Non-derivative open-market sales of Class A Common Stock
Net share direction -323,452 shares Net buy/sell shares for this Form 4 period
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 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.
pecuniary interest financial
"except to the extent of its or his pecuniary interest therein."
ten percent owner regulatory
"is_ten_percent_owner": 1"
indirect ownership regulatory
""ownership_type": "indirect""
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 →
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)
04/21/2026		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 Stock04/21/2026S28,117D$118.26(1)5,023,856IFootnotes(2)(3)(4)(5)
Class A Common Stock04/21/2026S86,783D$118.26(1)20,622,833IFootnotes(2)(3)(4)(6)
Class A Common Stock04/21/2026S11,376D$118.26(1)1,367,799IFootnotes(2)(3)(4)(7)
Class A Common Stock04/21/2026S1,179D$118.26(1)279,489IFootnotes(2)(3)(4)(8)
Class A Common Stock04/21/2026S25,361D$118.26(1)4,569,619IFootnotes(2)(3)(4)(9)
Class A Common Stock04/21/2026S34,817D$118.26(1)5,724,032IFootnotes(2)(3)(4)(10)
Class A Common Stock04/21/2026S43,649D$118.26(1)8,155,224IFootnotes(2)(3)(4)(11)
Class A Common Stock04/21/2026S9,859D$118.26(1)1,007,567IFootnotes(2)(3)(4)(12)
Class A Common Stock04/21/2026S37,129D$118.26(1)8,094,072IFootnotes(2)(3)(4)(13)
Class A Common Stock04/21/2026S22,886D$118.26(1)2,765,650IFootnotes(2)(3)(4)(14)
Class A Common Stock04/21/2026S18,435D$118.26(1)2,679,978IFootnotes(2)(3)(4)(15)
Class A Common Stock04/21/2026S3,861D$118.26(1)796,282IFootnotes(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 $118.00 to $118.74, 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 LLC04/22/2026
/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 LP04/22/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC04/22/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman04/22/2026
** 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 in CoreWeave (CRWV) shares?

Magnetar-affiliated funds reported selling CoreWeave Class A shares in the open market. The Form 4 shows 12 separate transactions totaling 323,452 shares on April 21, 2026, all at a weighted average price of $118.26 per share, reflecting a sizable institutional trade.

How many CoreWeave (CRWV) shares were sold and at what price?

The filing reports total sales of 323,452 CoreWeave Class A shares. These were executed across multiple transactions at prices ranging from $118.00 to $118.74, with a weighted average sale price of $118.26 per share, as disclosed in the footnotes.

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

No, the filing states that Magnetar funds, Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman disclaim beneficial ownership. They only acknowledge beneficial ownership to the extent of their pecuniary interest in the CoreWeave shares held by the underlying investment funds.

What does the weighted average price mean in this CoreWeave insider sale?

The weighted average price of $118.26 represents the average sale price across many small trades. The footnote explains shares were sold between $118.00 and $118.74, and the filer will provide detailed breakdowns of the number of shares at each price upon request.

Are these CoreWeave (CRWV) sales direct or indirect holdings for the reporting persons?

All reported CoreWeave transactions are classified as indirect holdings. The shares are owned by limited partnerships, LLCs and offshore funds for which Magnetar Financial acts as adviser, with the higher-level Magnetar entities and David J. Snyderman positioned above them in the ownership structure.