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  4. [Form 4/A] CoreWeave, Inc. Amended Insider Trading Activity

Magnetar funds sell CoreWeave (CRWV) stock at $108–$110

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

CoreWeave, Inc. (CRWV) received an amended Form 4 from Magnetar-affiliated reporting persons correcting how share sales on August 14, 2026 were allocated among various Magnetar Funds. The amendment states that the aggregate number of Class A Common Stock shares sold is unchanged.

Across 24 indirect transactions by different Magnetar Funds, the reporting group sold 307,131 shares of CoreWeave Class A Common Stock at weighted-average and fixed prices between $108.00 and $110.00 per share. The Magnetar entities and David J. Snyderman disclaim beneficial ownership except to the extent of their pecuniary interests.

Positive

  • None.

Negative

  • None.
Insider Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, Snyderman David J.
Role 10% Owner | 10% Owner | 10% Owner | 10% Owner
Sold 307,131 shs ($33.40M)
Type Security Shares Price Value
Sale Class A Common Stock F1, F2, F3, F4, F5 24,708 $108.48 $2.68M
Sale Class A Common Stock F2, F3, F4, F5 4,912 $109.99 $540K
Sale Class A Common Stock F2, F3, F4, F5 552 $110.00 $61K
Sale Class A Common Stock F1, F2, F3, F4, F6 24,743 $108.48 $2.68M
Sale Class A Common Stock F2, F3, F4, F6 4,919 $109.99 $541K
Sale Class A Common Stock F2, F3, F4, F6 553 $110.00 $61K
Sale Class A Common Stock F1, F2, F3, F4, F7 84,544 $108.48 $9.17M
Sale Class A Common Stock F2, F3, F4, F7 16,807 $109.99 $1.85M
Sale Class A Common Stock F2, F3, F4, F7 1,887 $110.00 $208K
Sale Class A Common Stock F1, F2, F3, F4, F8 1,146 $108.48 $124K
Sale Class A Common Stock F2, F3, F4, F8 228 $109.99 $25K
Sale Class A Common Stock F2, F3, F4, F8 26 $110.00 $3K
Sale Class A Common Stock F1, F2, F3, F4, F9 33,922 $108.48 $3.68M
Sale Class A Common Stock F2, F3, F4, F9 6,743 $109.99 $742K
Sale Class A Common Stock F2, F3, F4, F9 758 $110.00 $83K
Sale Class A Common Stock F1, F2, F3, F4, F10 36,168 $108.48 $3.92M
Sale Class A Common Stock F2, F3, F4, F10 7,190 $109.99 $791K
Sale Class A Common Stock F2, F3, F4, F10 808 $110.00 $89K
Sale Class A Common Stock F1, F2, F3, F4, F11 3,763 $108.48 $408K
Sale Class A Common Stock F2, F3, F4, F11 748 $109.99 $82K
Sale Class A Common Stock F2, F3, F4, F11 84 $110.00 $9K
Sale Class A Common Stock F1, F2, F3, F4, F12 42,519 $108.48 $4.61M
Sale Class A Common Stock F2, F3, F4, F12 8,453 $109.99 $930K
Sale Class A Common Stock F2, F3, F4, F12 950 $110.00 $105K
holding Class A Common Stock F2, F3, F4, F13 -- -- --
holding Class A Common Stock F2, F3, F4, F14 -- -- --
holding Class A Common Stock F2, F3, F4, F15 -- -- --
holding Class A Common Stock F2, F3, F4, F16 -- -- --
holding Class A Common Stock F2, F3, F4, F17 -- -- --
Holdings After Transaction: Class A Common Stock — 13,327,765 shares (Indirect, Footnotes)
Footnotes (17)
  1. F1. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $108.00 to $108.72, 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. F2. 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. F3. 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. F4. 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. F5. These securities are held directly by Magnetar Constellation Master Fund, Ltd.
  6. F6. These securities are held directly by CW Opportunity 2 LP.
  7. F7. These securities are held directly by CW Opportunity LLC.
  8. F8. These securities are held directly by Magnetar Capital Master Fund, Ltd.
  9. F9. These securities are held directly by Magnetar Lake Credit Fund LLC.
  10. F10. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
  11. F11. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
  12. F12. These securities are held directly by Longhorn Special Opportunities Fund LP.
  13. F13. These securities are held directly by Magnetar Alpha Star Fund LLC.
  14. F14. These securities are held directly by Magnetar Longhorn Fund LP.
  15. F15. These securities are held directly by Magnetar SC Fund Ltd.
  16. F16. These securities are held directly by Magnetar Xing He Master Fund Ltd.
  17. F17. These securities are held directly by Purpose Alternative Credit Fund - F LLC.
Total shares sold 307,131 shares Aggregate shares of CoreWeave Class A Common Stock sold on August 14, 2026 by Magnetar Funds
Number of sale transactions 24 Non-derivative sale entries for Class A Common Stock reported in the amendment
Weighted-average price range $108.00–$108.72 Range of prices underlying weighted-average sales noted in Footnote F1
Other reported sale prices $109.99 and $110.00 per share Fixed per-share prices for several Class A Common Stock sale transactions
Holding entries 5 Indirect holding-type rows for various Magnetar Funds with no share amounts stated
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.
ten percent owner regulatory
"each is listed as a ten percent owner of CoreWeave, Inc."
beneficial ownership regulatory
"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."

FAQ

What does the Form 4/A filing involving CoreWeave (CRWV) and Magnetar report?
It reports that Magnetar-affiliated funds sold 307,131 shares of CoreWeave Class A Common Stock on August 14, 2026. The amendment corrects which Magnetar Funds executed specific sales but leaves the aggregate shares sold unchanged from the original filing.

Why was the CoreWeave (CRWV) Form 4/A amended by the Magnetar reporting persons?
It was amended to correct misstatements in the original Form 4 about which Magnetar Funds sold particular share blocks. The filing states that only fund-level attributions and share breakdowns changed; the total number of shares sold did not change.

Who are the reporting persons on the CoreWeave (CRWV) Form 4/A amendment?
The reporting persons are Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman, each listed as a ten percent owner. They report indirect holdings through various Magnetar Funds and disclaim beneficial ownership beyond their pecuniary interests.

Were the CoreWeave (CRWV) share sales under a Rule 10b5-1 trading plan?
The filing’s Rule 10b5-1 checkbox is not marked as an affirmative plan, and no footnote states that the trades were made under a Rule 10b5-1 plan. The transactions are described simply as sales in open market or private transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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)
08/14/2026		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)
08/14/2026
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 Stock08/14/2026S24,708D$108.48(1)3,309,861IFootnotes(2)(3)(4)(5)
Class A Common Stock08/14/2026S4,912D$109.993,304,949IFootnotes(2)(3)(4)(5)
Class A Common Stock08/14/2026S552D$1103,304,397IFootnotes(2)(3)(4)(5)
Class A Common Stock08/14/2026S24,743D$108.48(1)3,713,016IFootnotes(2)(3)(4)(6)
Class A Common Stock08/14/2026S4,919D$109.993,708,097IFootnotes(2)(3)(4)(6)
Class A Common Stock08/14/2026S553D$1103,707,544IFootnotes(2)(3)(4)(6)
Class A Common Stock08/14/2026S84,544D$108.48(1)16,312,272IFootnotes(2)(3)(4)(7)
Class A Common Stock08/14/2026S16,807D$109.9916,295,465IFootnotes(2)(3)(4)(7)
Class A Common Stock08/14/2026S1,887D$11016,293,578IFootnotes(2)(3)(4)(7)
Class A Common Stock08/14/2026S1,146D$108.48(1)221,064IFootnotes(2)(3)(4)(8)
Class A Common Stock08/14/2026S228D$109.99220,836IFootnotes(2)(3)(4)(8)
Class A Common Stock08/14/2026S26D$110220,810IFootnotes(2)(3)(4)(8)
Class A Common Stock08/14/2026S33,922D$108.48(1)3,994,508IFootnotes(2)(3)(4)(9)
Class A Common Stock08/14/2026S6,743D$109.993,987,765IFootnotes(2)(3)(4)(9)
Class A Common Stock08/14/2026S758D$1103,987,007IFootnotes(2)(3)(4)(9)
Class A Common Stock08/14/2026S36,168D$108.48(1)6,249,941IFootnotes(2)(3)(4)(10)
Class A Common Stock08/14/2026S7,190D$109.996,242,751IFootnotes(2)(3)(4)(10)
Class A Common Stock08/14/2026S808D$1106,241,943IFootnotes(2)(3)(4)(10)
Class A Common Stock08/14/2026S3,763D$108.48(1)604,454IFootnotes(2)(3)(4)(11)
Class A Common Stock08/14/2026S748D$109.99603,706IFootnotes(2)(3)(4)(11)
Class A Common Stock08/14/2026S84D$110603,622IFootnotes(2)(3)(4)(11)
Class A Common Stock08/14/2026S42,519D$108.48(1)1,338,133IFootnotes(2)(3)(4)(12)
Class A Common Stock08/14/2026S8,453D$109.991,329,680IFootnotes(2)(3)(4)(12)
Class A Common Stock08/14/2026S950D$1101,328,730IFootnotes(2)(3)(4)(12)
Class A Common Stock932,981IFootnotes(2)(3)(4)(13)
Class A Common Stock6,622,946IFootnotes(2)(3)(4)(14)
Class A Common Stock768,748IFootnotes(2)(3)(4)(15)
Class A Common Stock1,891,986IFootnotes(2)(3)(4)(16)
Class A Common Stock1,782,374IFootnotes(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 $108.00 to $108.72, 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 Magnetar Constellation Master Fund, Ltd.
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 Capital Master Fund, Ltd.
9. These securities are held directly by Magnetar Lake Credit Fund LLC.
10. These securities are held directly by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund. They are not separate legal entities.
11. These securities are held directly by Purpose Alternative Credit Fund - T LLC.
12. These securities are held directly by Longhorn Special Opportunities Fund LP.
13. These securities are held directly by Magnetar Alpha Star Fund LLC.
14. These securities are held directly by Magnetar Longhorn Fund LP.
15. These securities are held directly by Magnetar SC Fund Ltd.
16. These securities are held directly by Magnetar Xing He Master Fund Ltd.
17. These securities are held directly by Purpose Alternative Credit Fund - F LLC.
Remarks:
On August 14, 2026, the reporting persons filed a Form 4 which incorrectly stated the numbers of shares in Columns 4 and 5 in Table 1 with respect to certain Magnetar Funds. The amendment does not change the aggregate number of shares sold by the Magnetar Funds. The prior Form 4 inadvertently listed the sales of shares by (i) CW Opportunity 2 LP when such sales were by Magnetar Constellation Master Fund, Ltd, (ii) CW Opportunity LLC when such sales were by CW Opportunity 2 LP, (iii) Longhorn Special Opportunities Fund LP when such sales were by CW Opportunity LLC, (iv) Magnetar Constellation Master Fund, Ltd when such sales were by Magnetar Lake Credit Fund LLC, (v) Magnetar Lake Credit Fund LLC when such sales were by Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund (They are not separate legal entities), (vi) Magnetar Structured Credit Fund, LP DBA Magnetar Constellation Onshore Fund (They are not separate legal entities) when such sales were by Purpose Alternative Credit Fund - T LLC and (vii) Purpose Alternative Credit Fund - T LLC when such sales were by Longhorn Special Opportunities Fund LP. This amended Form 4 is being filed for purposes of correcting this misstatement and listing the correct number of shares sold by each Magnetar Fund. The reporting persons are restating the entire initial Form 4's transactions.
/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 LLC08/18/2026
/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 LP08/18/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC08/18/2026
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman08/18/2026
** 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